Commit Graph

529 Commits

Author SHA1 Message Date
Greg Kroah-Hartman
b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00
Kees Cook
e4dca7b7aa treewide: Fix function prototypes for module_param_call()
Several function prototypes for the set/get functions defined by
module_param_call() have a slightly wrong argument types. This fixes
those in an effort to clean up the calls when running under type-enforced
compiler instrumentation for CFI. This is the result of running the
following semantic patch:

@match_module_param_call_function@
declarer name module_param_call;
identifier _name, _set_func, _get_func;
expression _arg, _mode;
@@

 module_param_call(_name, _set_func, _get_func, _arg, _mode);

@fix_set_prototype
 depends on match_module_param_call_function@
identifier match_module_param_call_function._set_func;
identifier _val, _param;
type _val_type, _param_type;
@@

 int _set_func(
-_val_type _val
+const char * _val
 ,
-_param_type _param
+const struct kernel_param * _param
 ) { ... }

@fix_get_prototype
 depends on match_module_param_call_function@
identifier match_module_param_call_function._get_func;
identifier _val, _param;
type _val_type, _param_type;
@@

 int _get_func(
-_val_type _val
+char * _val
 ,
-_param_type _param
+const struct kernel_param * _param
 ) { ... }

Two additional by-hand changes are included for places where the above
Coccinelle script didn't notice them:

	drivers/platform/x86/thinkpad_acpi.c
	fs/lockd/svc.c

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
2017-10-31 15:30:37 +01:00
Linus Torvalds
80c094a47d Revert "apparmor: add base infastructure for socket mediation"
This reverts commit 651e28c553.

This caused a regression:
 "The specific problem is that dnsmasq refuses to start on openSUSE Leap
  42.2.  The specific cause is that and attempt to open a PF_LOCAL socket
  gets EACCES.  This means that networking doesn't function on a system
  with a 4.14-rc2 system."

Sadly, the developers involved seemed to be in denial for several weeks
about this, delaying the revert.  This has not been a good release for
the security subsystem, and this area needs to change development
practices.

Reported-and-bisected-by: James Bottomley <James.Bottomley@hansenpartnership.com>
Tracked-by: Thorsten Leemhuis <regressions@leemhuis.info>
Cc: John Johansen <john.johansen@canonical.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Seth Arnold <seth.arnold@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-10-26 19:35:35 +02:00
Will Deacon
26c4eb192c locking/rwsem, security/apparmor: Replace homebrew use of write_can_lock() with lockdep
The lockdep subsystem provides a robust way to assert that a lock is
held, so use that instead of write_can_lock, which can give incorrect
results for qrwlocks.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: John Johansen <john.johansen@canonical.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1507055129-12300-1-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-10 11:50:17 +02:00
Linus Torvalds
79444df4e7 + Features
- in preparation for secid mapping add support for absolute root view
     based labels
   - add base infastructure for socket mediation
   - add mount mediation
   - add signal mediation
 
 + minor cleanups and changes
   - be defensive, ensure unconfined profiles have dfas initialized
   - add more debug asserts to apparmorfs
   - enable policy unpacking to audit different reasons for failure
   - cleanup conditional check for label in label_print
   - Redundant condition: prev_ns. in [label.c:1498]
 
 + Bug Fixes
   - fix regression in apparmorfs DAC access permissions
   - fix build failure on sparc caused by undeclared signals
   - fix sparse report of incorrect type assignment when freeing label proxies
   - fix race condition in null profile creation
   - Fix an error code in aafs_create()
   - Fix logical error in verify_header()
   - Fix shadowed local variable in unpack_trans_table()
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Merge tag 'apparmor-pr-2017-09-22' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor

Pull apparmor updates from John Johansen:
 "This is the apparmor pull request, similar to SELinux and seccomp.

  It's the same series that I was sent to James' security tree + one
  regression fix that was found after the series was sent to James and
  would have been sent for v4.14-rc2.

  Features:
  - in preparation for secid mapping add support for absolute root view
    based labels
  - add base infastructure for socket mediation
  - add mount mediation
  - add signal mediation

  minor cleanups and changes:
  - be defensive, ensure unconfined profiles have dfas initialized
  - add more debug asserts to apparmorfs
  - enable policy unpacking to audit different reasons for failure
  - cleanup conditional check for label in label_print
  - Redundant condition: prev_ns. in [label.c:1498]

  Bug Fixes:
  - fix regression in apparmorfs DAC access permissions
  - fix build failure on sparc caused by undeclared signals
  - fix sparse report of incorrect type assignment when freeing label proxies
  - fix race condition in null profile creation
  - Fix an error code in aafs_create()
  - Fix logical error in verify_header()
  - Fix shadowed local variable in unpack_trans_table()"

* tag 'apparmor-pr-2017-09-22' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor:
  apparmor: fix apparmorfs DAC access permissions
  apparmor: fix build failure on sparc caused by undeclared signals
  apparmor: fix incorrect type assignment when freeing proxies
  apparmor: ensure unconfined profiles have dfas initialized
  apparmor: fix race condition in null profile creation
  apparmor: move new_null_profile to after profile lookup fns()
  apparmor: add base infastructure for socket mediation
  apparmor: add more debug asserts to apparmorfs
  apparmor: make policy_unpack able to audit different info messages
  apparmor: add support for absolute root view based labels
  apparmor: cleanup conditional check for label in label_print
  apparmor: add mount mediation
  apparmor: add the ability to mediate signals
  apparmor: Redundant condition: prev_ns. in [label.c:1498]
  apparmor: Fix an error code in aafs_create()
  apparmor: Fix logical error in verify_header()
  apparmor: Fix shadowed local variable in unpack_trans_table()
2017-09-23 05:33:29 -10:00
John Johansen
bf81100f63 apparmor: fix apparmorfs DAC access permissions
The DAC access permissions for several apparmorfs files are wrong.

.access - needs to be writable by all tasks to perform queries
the others in the set only provide a read fn so should be read only.

With policy namespace virtualization all apparmor needs to control
the permission and visibility checks directly which means DAC
access has to be allowed for all user, group, and other.

BugLink: http://bugs.launchpad.net/bugs/1713103
Fixes: c97204baf8 ("apparmor: rename apparmor file fns and data to indicate use")
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:20:01 -07:00
John Johansen
b1545dba09 apparmor: fix build failure on sparc caused by undeclared signals
In file included from security/apparmor/ipc.c:23:0:
  security/apparmor/include/sig_names.h:26:3: error: 'SIGSTKFLT' undeclared here (not in a function)
    [SIGSTKFLT] = 16, /* -, 16, - */
     ^
  security/apparmor/include/sig_names.h:26:3: error: array index in initializer not of integer type
  security/apparmor/include/sig_names.h:26:3: note: (near initialization for 'sig_map')
  security/apparmor/include/sig_names.h:51:3: error: 'SIGUNUSED' undeclared here (not in a function)
    [SIGUNUSED] = 34, /* -, 31, - */
     ^
  security/apparmor/include/sig_names.h:51:3: error: array index in initializer not of integer type
  security/apparmor/include/sig_names.h:51:3: note: (near initialization for 'sig_map')

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: c6bf1adaecaa ("apparmor: add the ability to mediate signals")
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:00:58 -07:00
John Johansen
bc4d82fb94 apparmor: fix incorrect type assignment when freeing proxies
sparse reports

poisoning the proxy->label before freeing the struct is resulting in
a sparse build warning.
../security/apparmor/label.c:52:30: warning: incorrect type in assignment (different address spaces)
../security/apparmor/label.c:52:30:    expected struct aa_label [noderef] <asn:4>*label
../security/apparmor/label.c:52:30:    got struct aa_label *<noident>

fix with RCU_INIT_POINTER as this is one of those cases where
rcu_assign_pointer() is not needed.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:00:58 -07:00
John Johansen
15372b97aa apparmor: ensure unconfined profiles have dfas initialized
Generally unconfined has early bailout tests and does not need the
dfas initialized, however if an early bailout test is ever missed
it will result in an oops.

Be defensive and initialize the unconfined profile to have null dfas
(no permission) so if an early bailout test is missed we fail
closed (no perms granted) instead of oopsing.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:00:58 -07:00
John Johansen
290638a52a apparmor: fix race condition in null profile creation
There is a race when null- profile is being created between the
initial lookup/creation of the profile and lock/addition of the
profile. This could result in multiple version of a profile being
added to the list which need to be removed/replaced.

Since these are learning profile their is no affect on mediation.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:00:58 -07:00
John Johansen
d07881d2ed apparmor: move new_null_profile to after profile lookup fns()
new_null_profile will need to use some of the profile lookup fns()
so move instead of doing forward fn declarations.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:00:58 -07:00
John Johansen
651e28c553 apparmor: add base infastructure for socket mediation
Provide a basic mediation of sockets. This is not a full net mediation
but just whether a spcific family of socket can be used by an
application, along with setting up some basic infrastructure for
network mediation to follow.

the user space rule hav the basic form of
  NETWORK RULE = [ QUALIFIERS ] 'network' [ DOMAIN ]
                 [ TYPE | PROTOCOL ]

  DOMAIN = ( 'inet' | 'ax25' | 'ipx' | 'appletalk' | 'netrom' |
             'bridge' | 'atmpvc' | 'x25' | 'inet6' | 'rose' |
	     'netbeui' | 'security' | 'key' | 'packet' | 'ash' |
	     'econet' | 'atmsvc' | 'sna' | 'irda' | 'pppox' |
	     'wanpipe' | 'bluetooth' | 'netlink' | 'unix' | 'rds' |
	     'llc' | 'can' | 'tipc' | 'iucv' | 'rxrpc' | 'isdn' |
	     'phonet' | 'ieee802154' | 'caif' | 'alg' | 'nfc' |
	     'vsock' | 'mpls' | 'ib' | 'kcm' ) ','

  TYPE = ( 'stream' | 'dgram' | 'seqpacket' |  'rdm' | 'raw' |
           'packet' )

  PROTOCOL = ( 'tcp' | 'udp' | 'icmp' )

eg.
  network,
  network inet,

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2017-09-22 13:00:58 -07:00
John Johansen
cbf2d0e1a9 apparmor: add more debug asserts to apparmorfs
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2017-09-22 13:00:58 -07:00
John Johansen
2410aa96d6 apparmor: make policy_unpack able to audit different info messages
Switch unpack auditing to using the generic name field in the audit
struct and make it so we can start adding new info messages about
why an unpack failed.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2017-09-22 13:00:58 -07:00
John Johansen
26b7899510 apparmor: add support for absolute root view based labels
With apparmor policy virtualization based on policy namespace View's
we don't generally want/need absolute root based views, however there
are cases like debugging and some secid based conversions where
using a root based view is important.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2017-09-22 13:00:58 -07:00
John Johansen
f872af75d3 apparmor: cleanup conditional check for label in label_print
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2017-09-22 13:00:57 -07:00
John Johansen
2ea3ffb778 apparmor: add mount mediation
Add basic mount mediation. That allows controlling based on basic
mount parameters. It does not include special mount parameters for
apparmor, super block labeling, or any triggers for apparmor namespace
parameter modifications on pivot root.

default userspace policy rules have the form of
  MOUNT RULE = ( MOUNT | REMOUNT | UMOUNT )

  MOUNT = [ QUALIFIERS ] 'mount' [ MOUNT CONDITIONS ] [ SOURCE FILEGLOB ]
          [ '->' MOUNTPOINT FILEGLOB ]

  REMOUNT = [ QUALIFIERS ] 'remount' [ MOUNT CONDITIONS ]
            MOUNTPOINT FILEGLOB

  UMOUNT = [ QUALIFIERS ] 'umount' [ MOUNT CONDITIONS ] MOUNTPOINT FILEGLOB

  MOUNT CONDITIONS = [ ( 'fstype' | 'vfstype' ) ( '=' | 'in' )
                       MOUNT FSTYPE EXPRESSION ]
		       [ 'options' ( '=' | 'in' ) MOUNT FLAGS EXPRESSION ]

  MOUNT FSTYPE EXPRESSION = ( MOUNT FSTYPE LIST | MOUNT EXPRESSION )

  MOUNT FSTYPE LIST = Comma separated list of valid filesystem and
                      virtual filesystem types (eg ext4, debugfs, etc)

  MOUNT FLAGS EXPRESSION = ( MOUNT FLAGS LIST | MOUNT EXPRESSION )

  MOUNT FLAGS LIST = Comma separated list of MOUNT FLAGS.

  MOUNT FLAGS = ( 'ro' | 'rw' | 'nosuid' | 'suid' | 'nodev' | 'dev' |
                  'noexec' | 'exec' | 'sync' | 'async' | 'remount' |
		  'mand' | 'nomand' | 'dirsync' | 'noatime' | 'atime' |
		  'nodiratime' | 'diratime' | 'bind' | 'rbind' | 'move' |
		  'verbose' | 'silent' | 'loud' | 'acl' | 'noacl' |
		  'unbindable' | 'runbindable' | 'private' | 'rprivate' |
		  'slave' | 'rslave' | 'shared' | 'rshared' |
		  'relatime' | 'norelatime' | 'iversion' | 'noiversion' |
		  'strictatime' | 'nouser' | 'user' )

  MOUNT EXPRESSION = ( ALPHANUMERIC | AARE ) ...

  PIVOT ROOT RULE = [ QUALIFIERS ] pivot_root [ oldroot=OLD PUT FILEGLOB ]
                    [ NEW ROOT FILEGLOB ]

  SOURCE FILEGLOB = FILEGLOB

  MOUNTPOINT FILEGLOB = FILEGLOB

eg.
  mount,
  mount /dev/foo,
  mount options=ro /dev/foo -> /mnt/,
  mount options in (ro,atime) /dev/foo -> /mnt/,
  mount options=ro options=atime,

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2017-09-22 13:00:57 -07:00
John Johansen
cd1dbf76b2 apparmor: add the ability to mediate signals
Add signal mediation where the signal can be mediated based on the
signal, direction, or the label or the peer/target. The signal perms
are verified on a cross check to ensure policy consistency in the case
of incremental policy load/replacement.

The optimization of skipping the cross check when policy is guaranteed
to be consistent (single compile unit) remains to be done.

policy rules have the form of
  SIGNAL_RULE = [ QUALIFIERS ] 'signal' [ SIGNAL ACCESS PERMISSIONS ]
                [ SIGNAL SET ] [ SIGNAL PEER ]

  SIGNAL ACCESS PERMISSIONS = SIGNAL ACCESS | SIGNAL ACCESS LIST

  SIGNAL ACCESS LIST = '(' Comma or space separated list of SIGNAL
                           ACCESS ')'

  SIGNAL ACCESS = ( 'r' | 'w' | 'rw' | 'read' | 'write' | 'send' |
                    'receive' )

  SIGNAL SET = 'set' '=' '(' SIGNAL LIST ')'

  SIGNAL LIST = Comma or space separated list of SIGNALS

  SIGNALS = ( 'hup' | 'int' | 'quit' | 'ill' | 'trap' | 'abrt' |
              'bus' | 'fpe' | 'kill' | 'usr1' | 'segv' | 'usr2' |
	      'pipe' | 'alrm' | 'term' | 'stkflt' | 'chld' | 'cont' |
	      'stop' | 'stp' | 'ttin' | 'ttou' | 'urg' | 'xcpu' |
	      'xfsz' | 'vtalrm' | 'prof' | 'winch' | 'io' | 'pwr' |
	      'sys' | 'emt' | 'exists' | 'rtmin+0' ... 'rtmin+32'
            )

  SIGNAL PEER = 'peer' '=' AARE

eg.
  signal,                                 # allow all signals
  signal send set=(hup, kill) peer=foo,

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2017-09-22 13:00:57 -07:00
John Johansen
c5561700c9 apparmor: Redundant condition: prev_ns. in [label.c:1498]
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:00:57 -07:00
Dan Carpenter
5d314a81ec apparmor: Fix an error code in aafs_create()
We accidentally forgot to set the error code on this path.  It means we
return NULL instead of an error pointer.  I looked through a bunch of
callers and I don't think it really causes a big issue, but the
documentation says we're supposed to return error pointers here.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:00:57 -07:00
Christos Gkekas
86aea56f14 apparmor: Fix logical error in verify_header()
verify_header() is currently checking whether interface version is less
than 5 *and* greater than 7, which always evaluates to false. Instead it
should check whether it is less than 5 *or* greater than 7.

Signed-off-by: Christos Gkekas <chris.gekas@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:00:57 -07:00
Geert Uytterhoeven
19fe43a54f apparmor: Fix shadowed local variable in unpack_trans_table()
with W=2:

    security/apparmor/policy_unpack.c: In function ‘unpack_trans_table’:
    security/apparmor/policy_unpack.c:469: warning: declaration of ‘pos’ shadows a previous local
    security/apparmor/policy_unpack.c:451: warning: shadowed declaration is here

Rename the old "pos" to "saved_pos" to fix this.

Fixes: 5379a33120 ("apparmor: support v7 transition format compatible with label_parse")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-09-22 13:00:57 -07:00
Kees Cook
993b3ab064 apparmor: Refactor to remove bprm_secureexec hook
The AppArmor bprm_secureexec hook can be merged with the bprm_set_creds
hook since it's dealing with the same information, and all of the details
are finalized during the first call to the bprm_set_creds hook via
prepare_binprm() (subsequent calls due to binfmt_script, etc, are ignored
via bprm->called_set_creds).

Here, all the comments describe how secureexec is actually calculated
during bprm_set_creds, so this actually does it, drops the bprm flag that
was being used internally by AppArmor, and drops the bprm_secureexec hook.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: James Morris <james.l.morris@oracle.com>
Acked-by: Serge Hallyn <serge@hallyn.com>
2017-08-01 12:03:06 -07:00
Kees Cook
ddb4a1442d exec: Rename bprm->cred_prepared to called_set_creds
The cred_prepared bprm flag has a misleading name. It has nothing to do
with the bprm_prepare_cred hook, and actually tracks if bprm_set_creds has
been called. Rename this flag and improve its comment.

Cc: David Howells <dhowells@redhat.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: John Johansen <john.johansen@canonical.com>
Acked-by: James Morris <james.l.morris@oracle.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Acked-by: Serge Hallyn <serge@hallyn.com>
2017-08-01 12:02:48 -07:00
Linus Torvalds
e24dd9ee53 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security layer updates from James Morris:

 - a major update for AppArmor. From JJ:

     * several bug fixes and cleanups

     * the patch to add symlink support to securityfs that was floated
       on the list earlier and the apparmorfs changes that make use of
       securityfs symlinks

     * it introduces the domain labeling base code that Ubuntu has been
       carrying for several years, with several cleanups applied. And it
       converts the current mediation over to using the domain labeling
       base, which brings domain stacking support with it. This finally
       will bring the base upstream code in line with Ubuntu and provide
       a base to upstream the new feature work that Ubuntu carries.

     * This does _not_ contain any of the newer apparmor mediation
       features/controls (mount, signals, network, keys, ...) that
       Ubuntu is currently carrying, all of which will be RFC'd on top
       of this.

 - Notable also is the Infiniband work in SELinux, and the new file:map
   permission. From Paul:

      "While we're down to 21 patches for v4.13 (it was 31 for v4.12),
       the diffstat jumps up tremendously with over 2k of line changes.

       Almost all of these changes are the SELinux/IB work done by
       Daniel Jurgens; some other noteworthy changes include a NFS v4.2
       labeling fix, a new file:map permission, and reporting of policy
       capabilities on policy load"

   There's also now genfscon labeling support for tracefs, which was
   lost in v4.1 with the separation from debugfs.

 - Smack incorporates a safer socket check in file_receive, and adds a
   cap_capable call in privilege check.

 - TPM as usual has a bunch of fixes and enhancements.

 - Multiple calls to security_add_hooks() can now be made for the same
   LSM, to allow LSMs to have hook declarations across multiple files.

 - IMA now supports different "ima_appraise=" modes (eg. log, fix) from
   the boot command line.

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (126 commits)
  apparmor: put back designators in struct initialisers
  seccomp: Switch from atomic_t to recount_t
  seccomp: Adjust selftests to avoid double-join
  seccomp: Clean up core dump logic
  IMA: update IMA policy documentation to include pcr= option
  ima: Log the same audit cause whenever a file has no signature
  ima: Simplify policy_func_show.
  integrity: Small code improvements
  ima: fix get_binary_runtime_size()
  ima: use ima_parse_buf() to parse template data
  ima: use ima_parse_buf() to parse measurements headers
  ima: introduce ima_parse_buf()
  ima: Add cgroups2 to the defaults list
  ima: use memdup_user_nul
  ima: fix up #endif comments
  IMA: Correct Kconfig dependencies for hash selection
  ima: define is_ima_appraise_enabled()
  ima: define Kconfig IMA_APPRAISE_BOOTPARAM option
  ima: define a set of appraisal rules requiring file signatures
  ima: extend the "ima_policy" boot command line to support multiple policies
  ...
2017-07-05 11:26:35 -07:00
Stephen Rothwell
c4758fa592 apparmor: put back designators in struct initialisers
Fixes: 8014370f12 ("apparmor: move path_link mediation to using labels")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: John Johansen <john.johansen@canonical.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-06-28 15:50:43 +10:00
John Johansen
33f2eadabb apparmor: export that basic profile namespaces are supported
Allow userspace to detect that basic profile policy namespaces are
available.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:48 -07:00
John Johansen
6c5fc8f17a apparmor: add stacked domain labels interface
Update the user interface to support the stacked change_profile transition.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:48 -07:00
John Johansen
40cde7fcc3 apparmor: add domain label stacking info to apparmorfs
Now that the domain label transition is complete advertise it to
userspace.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:47 -07:00
John Johansen
e00b02bb6a apparmor: move change_profile mediation to using labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:47 -07:00
John Johansen
89dbf1962a apparmor: move change_hat mediation to using labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:46 -07:00
John Johansen
93c98a484c apparmor: move exec domain mediation to using labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:46 -07:00
John Johansen
5379a33120 apparmor: support v7 transition format compatible with label_parse
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:45 -07:00
John Johansen
064dc9472f apparmor: mediate files when they are received
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:45 -07:00
John Johansen
496c931966 apparmor: rework file permission to cache file access in file->ctx
This is a temporary step, towards using the file->ctx for delegation,
and also helps speed up file queries, until the permission lookup
cache is introduced.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:44 -07:00
John Johansen
8014370f12 apparmor: move path_link mediation to using labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:44 -07:00
John Johansen
aebd873e8d apparmor: refactor path name lookup and permission checks around labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:43 -07:00
John Johansen
98c3d18232 apparmor: update aa_audit_file() to use labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:43 -07:00
John Johansen
190a95189e apparmor: move aa_file_perm() to use labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:42 -07:00
John Johansen
290f458a4f apparmor: allow ptrace checks to be finer grained than just capability
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:42 -07:00
John Johansen
b2d09ae449 apparmor: move ptrace checks to using labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:41 -07:00
John Johansen
ca916e8e2d apparmor: add cross check permission helper macros
The cross check permission helper macros will help simplify code
that does cross task permission checks like ptrace.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:41 -07:00
John Johansen
86b92cb782 apparmor: move resource checks to using labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:40 -07:00
John Johansen
c70c86c421 apparmor: move capability checks to using labels
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:40 -07:00
John Johansen
317d9a054e apparmor: update query interface to support label queries
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:39 -07:00
John Johansen
76a1d263ab apparmor: switch getprocattr to using label_print fns()
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:39 -07:00
John Johansen
637f688dc3 apparmor: switch from profiles to using labels on contexts
Begin the actual switch to using domain labels by storing them on
the context and converting the label to a singular profile where
possible.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:38 -07:00
John Johansen
f1bd904175 apparmor: add the base fns() for domain labels
Begin moving apparmor to using broader domain labels, that will allow
run time computation of domain type splitting via "stacking" of
profiles into a domain label vec.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:38 -07:00
John Johansen
192ca6b55a apparmor: revalidate files during exec
Instead of running file revalidation lazily when read/write are called
copy selinux and revalidate the file table on exec. This avoids
extra mediation overhead in read/write and also prevents file handles
being passed through to a grand child unchecked.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:37 -07:00
John Johansen
2835a13bbd apparmor: cleanup rename XXX_file_context() to XXX_file_ctx()
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:37 -07:00
John Johansen
df8073c67f apparmor: convert aa_change_XXX bool parameters to flags
Instead of passing multiple booleans consolidate on a single flags
field.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:36 -07:00
John Johansen
dca91402e9 apparmor: cleanup remove unused and not fully implemented profile rename
Remove the partially implemented code, until this can be properly
implemented.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:36 -07:00
John Johansen
435222bc1b apparmor: refactor updating profiles to the newest parent
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:35 -07:00
John Johansen
a1bd627b46 apparmor: share profile name on replacement
The profile names are the same, leverage this.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:35 -07:00
John Johansen
cf797c0e5e apparmor: convert to profile block critical sections
There are still a few places where profile replacement fails to update
and a stale profile is used for mediation. Fix this by moving to
accessing the current label through a critical section that will
always ensure mediation is using the current label regardless of
whether the tasks cred has been updated or not.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:34 -07:00
John Johansen
fe864821d5 apparmor: move bprm_committing_creds/committed_creds to lsm.c
There is no reason to have the small stubs that don't use domain
private functions in domain.c, instead move them to lsm.c and make
them static.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:34 -07:00
John Johansen
d9f02d9c23 apparmor: fix display of ns name
The ns name being displayed should go through an ns view lookup.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:33 -07:00
John Johansen
5262ef60b1 apparmor: fix apparmor_query data
The data being queried isn't always the current profile and a lookup
relative to the current profile should be done.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:33 -07:00
John Johansen
60285eb3e7 apparmor: fix policy load/remove semantics
The namespace being passed into the replace/remove profiles fns() is
not the view, but the namespace specified by the inode from the
file hook (if present) or the loading tasks ns, if accessing the
top level virtualized load/replace file interface.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:32 -07:00
John Johansen
3664268f19 apparmor: add namespace lookup fns()
Currently lookups are restricted to a single ns component in the
path. However when namespaces are allowed to have separate views, and
scopes this will not be sufficient, as it will be possible to have
a multiple component ns path in scope.

Add some ns lookup fns() to allow this and use them.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:32 -07:00
John Johansen
ae3b316536 apparmor: cleanup __find_child()
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:31 -07:00
John Johansen
39d84824ea apparmor: provide information about path buffer size at boot
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:31 -07:00
John Johansen
4f3b3f2d79 apparmor: add profile permission query ability
Allow userspace to query a profile about permissions, through the
transaction interface that is already used to allow userspace to
query about key,value data.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:30 -07:00
John Johansen
2d679f3cb0 apparmor: switch from file_perms to aa_perms
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:30 -07:00
John Johansen
aa9aeea8d4 apparmor: add gerneric permissions struct and support fns
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:30 -07:00
John Johansen
b5b2557c0a apparmor: add fn to test if profile supports a given mediation class
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:29 -07:00
John Johansen
1dea3b41e8 apparmor: speed up transactional queries
The simple_transaction interface is slow. It requires 4 syscalls
(open, write, read, close) per query and shares a single lock for each
queries.

So replace its use with a compatible in multi_transaction interface.
It allows for a faster 2 syscall pattern per query. After an initial
open, an arbitrary number of writes and reads can be issued. Each
write will reset the query with new data that can be read. Reads do
not clear the data, and can be issued multiple times, and used with
seek, until a new write is performed which will reset the data
available and the seek position.

Note: this keeps the single lock design, if needed moving to a per
file lock will have to come later.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:29 -07:00
John Johansen
a83bd86e83 apparmor: add label data availability to the feature set
gsettings mediation needs to be able to determine if apparmor supports
label data queries. A label data query can be done to test for support
but its failure is indistinguishable from other failures, making it an
unreliable indicator.

Fix by making support of label data queries available as a flag in the
apparmorfs features dir tree.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:28 -07:00
John Johansen
4ae47f3335 apparmor: add mkdir/rmdir interface to manage policy namespaces
When setting up namespaces for containers its easier for them to use
an fs interface to create the namespace for the containers
policy. Allow mkdir/rmdir under the policy/namespaces/ dir to be used
to create and remove namespaces.

BugLink: http://bugs.launchpad.net/bugs/1611078

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:27 -07:00
John Johansen
d9bf2c268b apparmor: add policy revision file interface
Add a policy revision file to find the current revision of a ns's policy.
There is a revision file per ns, as well as a virtualized global revision
file in the base apparmor fs directory. The global revision file when
opened will provide the revision of the opening task namespace.

The revision file can be waited on via select/poll to detect apparmor
policy changes from the last read revision of the opened file. This
means that the revision file must be read after the select/poll other
wise update data will remain ready for reading.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:27 -07:00
John Johansen
18e99f191a apparmor: provide finer control over policy management
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-10 17:11:20 -07:00
John Johansen
e53cfe6c7c apparmor: rework perm mapping to a slightly broader set
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-09 05:59:22 -07:00
John Johansen
fc7e0b26b8 apparmor: move permissions into their own file to be more easily shared
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08 12:51:53 -07:00
John Johansen
c961ee5f21 apparmor: convert from securityfs to apparmorfs for policy ns files
Virtualize the apparmor policy/ directory so that the current
namespace affects what part of policy is seen. To do this convert to
using apparmorfs for policy namespace files and setup a magic symlink
in the securityfs apparmor dir to access those files.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Seth Arnold <seth.arnold@canonical.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
2017-06-08 12:51:52 -07:00
John Johansen
98407f0a0d apparmor: allow specifying an already created dir to create ns entries in
Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Seth Arnold <seth.arnold@canonical.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
2017-06-08 12:51:52 -07:00
John Johansen
c97204baf8 apparmor: rename apparmor file fns and data to indicate use
prefixes are used for fns/data that are not static to apparmorfs.c
with the prefixes being
  aafs   - special magic apparmorfs for policy namespace data
  aa_sfs - for fns/data that go into securityfs
  aa_fs  - for fns/data that may be used in the either of aafs or
           securityfs

Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Seth Arnold <seth.arnold@canonical.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
2017-06-08 12:51:52 -07:00
John Johansen
a481f4d917 apparmor: add custom apparmorfs that will be used by policy namespace files
AppArmor policy needs to be able to be resolved based on the policy
namespace a task is confined by. Add a base apparmorfs filesystem that
(like nsfs) will exist as a kern mount and be accessed via jump_link
through a securityfs file.

Setup the base apparmorfs fns and data, but don't use it yet.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Seth Arnold <seth.arnold@canonical.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
2017-06-08 12:51:51 -07:00
John Johansen
64c8697045 apparmor: use macro template to simplify namespace seq_files
Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Seth Arnold <seth.arnold@canonical.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
2017-06-08 12:51:51 -07:00
John Johansen
52b97de322 apparmor: use macro template to simplify profile seq_files
Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Seth Arnold <seth.arnold@canonical.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
2017-06-08 12:51:50 -07:00
John Johansen
5d5182cae4 apparmor: move to per loaddata files, instead of replicating in profiles
The loaddata sets cover more than just a single profile and should
be tracked at the ns level. Move the load data files under the namespace
and reference the files from the profiles via a symlink.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Seth Arnold <seth.arnold@canonical.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
2017-06-08 12:51:49 -07:00
John Johansen
4227c333f6 apparmor: Move path lookup to using preallocated buffers
Dynamically allocating buffers is problematic and is an extra layer
that is a potntial point of failure and can slow down mediation.
Change path lookup to use the preallocated per cpu buffers.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08 11:29:34 -07:00
John Johansen
72c8a76864 apparmor: allow profiles to provide info to disconnected paths
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08 11:29:34 -07:00
John Johansen
b91deb9db1 apparmor: make internal lib fn skipn_spaces available to the rest of apparmor
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08 11:29:33 -07:00
John Johansen
af7caa8f8d apparmor: move file context into file.h
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08 11:29:33 -07:00
Thomas Schneider
651e54953b security/apparmor: Use POSIX-compatible "printf '%s'"
When using a strictly POSIX-compliant shell, "-n #define ..." gets
written into the file.  Use "printf '%s'" to avoid this.

Signed-off-by: Thomas Schneider <qsx@qsx.re>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08 11:29:27 -07:00
Dan Carpenter
ffac1de6cf apparmor: Fix error cod in __aa_fs_profile_mkdir()
We can either return PTR_ERR(NULL) or a PTR_ERR(a valid pointer) here.
Returning NULL is probably not good, but since this happens at boot
then we are probably already toasted if we were to hit this bug in real
life.  In other words, it seems like a very low severity bug to me.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08 11:21:05 -07:00
Markus Elfring
47dbd1cdbb apparmorfs: Use seq_putc() in two functions
Two single characters (line breaks) should be put into a sequence.
Thus use the corresponding function "seq_putc".

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08 11:21:02 -07:00
Markus Elfring
0ff3d97f76 apparmorfs: Combine two function calls into one in aa_fs_seq_raw_abi_show()
A bit of data was put into a sequence by two separate function calls.
Print the same data by a single function call instead.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-06-08 11:20:58 -07:00
Kees Cook
26fccd9ed2 doc: ReSTify apparmor.txt
Adjusts for ReST markup and moves under LSM admin guide.

Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-05-18 10:32:38 -06:00
Deepa Dinamani
24d0d03c2e apparmorfs: replace CURRENT_TIME with current_time()
CURRENT_TIME macro is not y2038 safe on 32 bit systems.

The patch replaces all the uses of CURRENT_TIME by current_time().

This is also in preparation for the patch that transitions vfs
timestamps to use 64 bit time and hence make them y2038 safe.
current_time() is also planned to be transitioned to y2038 safe behavior
along with this change.

CURRENT_TIME macro will be deleted before merging the aforementioned
change.

Link: http://lkml.kernel.org/r/1491613030-11599-11-git-send-email-deepa.kernel@gmail.com
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-05-08 17:15:15 -07:00
Michal Hocko
a7c3e901a4 mm: introduce kv[mz]alloc helpers
Patch series "kvmalloc", v5.

There are many open coded kmalloc with vmalloc fallback instances in the
tree.  Most of them are not careful enough or simply do not care about
the underlying semantic of the kmalloc/page allocator which means that
a) some vmalloc fallbacks are basically unreachable because the kmalloc
part will keep retrying until it succeeds b) the page allocator can
invoke a really disruptive steps like the OOM killer to move forward
which doesn't sound appropriate when we consider that the vmalloc
fallback is available.

As it can be seen implementing kvmalloc requires quite an intimate
knowledge if the page allocator and the memory reclaim internals which
strongly suggests that a helper should be implemented in the memory
subsystem proper.

Most callers, I could find, have been converted to use the helper
instead.  This is patch 6.  There are some more relying on __GFP_REPEAT
in the networking stack which I have converted as well and Eric Dumazet
was not opposed [2] to convert them as well.

[1] http://lkml.kernel.org/r/20170130094940.13546-1-mhocko@kernel.org
[2] http://lkml.kernel.org/r/1485273626.16328.301.camel@edumazet-glaptop3.roam.corp.google.com

This patch (of 9):

Using kmalloc with the vmalloc fallback for larger allocations is a
common pattern in the kernel code.  Yet we do not have any common helper
for that and so users have invented their own helpers.  Some of them are
really creative when doing so.  Let's just add kv[mz]alloc and make sure
it is implemented properly.  This implementation makes sure to not make
a large memory pressure for > PAGE_SZE requests (__GFP_NORETRY) and also
to not warn about allocation failures.  This also rules out the OOM
killer as the vmalloc is a more approapriate fallback than a disruptive
user visible action.

This patch also changes some existing users and removes helpers which
are specific for them.  In some cases this is not possible (e.g.
ext4_kvmalloc, libcfs_kvzalloc) because those seems to be broken and
require GFP_NO{FS,IO} context which is not vmalloc compatible in general
(note that the page table allocation is GFP_KERNEL).  Those need to be
fixed separately.

While we are at it, document that __vmalloc{_node} about unsupported gfp
mask because there seems to be a lot of confusion out there.
kvmalloc_node will warn about GFP_KERNEL incompatible (which are not
superset) flags to catch new abusers.  Existing ones would have to die
slowly.

[sfr@canb.auug.org.au: f2fs fixup]
  Link: http://lkml.kernel.org/r/20170320163735.332e64b7@canb.auug.org.au
Link: http://lkml.kernel.org/r/20170306103032.2540-2-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>	[ext4 part]
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-05-08 17:15:12 -07:00
John Johansen
622f6e3265 apparmor: Make path_max parameter readonly
The path_max parameter determines the max size of buffers allocated
but it should  not be setable at run time. If can be used to cause an
oops

root@ubuntu:~# echo 16777216 > /sys/module/apparmor/parameters/path_max
root@ubuntu:~# cat /sys/module/apparmor/parameters/path_max
Killed

[  122.141911] BUG: unable to handle kernel paging request at ffff880080945fff
[  122.143497] IP: [<ffffffff81228844>] d_absolute_path+0x44/0xa0
[  122.144742] PGD 220c067 PUD 0
[  122.145453] Oops: 0002 [#1] SMP
[  122.146204] Modules linked in: vmw_vsock_vmci_transport vsock ppdev vmw_balloon snd_ens1371 btusb snd_ac97_codec gameport snd_rawmidi btrtl snd_seq_device ac97_bus btbcm btintel snd_pcm input_leds bluetooth snd_timer snd joydev soundcore serio_raw coretemp shpchp nfit parport_pc i2c_piix4 8250_fintek vmw_vmci parport mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd vmwgfx psmouse mptspi ttm mptscsih drm_kms_helper mptbase syscopyarea scsi_transport_spi sysfillrect
[  122.163365]  ahci sysimgblt e1000 fb_sys_fops libahci drm pata_acpi fjes
[  122.164747] CPU: 3 PID: 1501 Comm: bash Not tainted 4.4.0-59-generic #80-Ubuntu
[  122.166250] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[  122.168611] task: ffff88003496aa00 ti: ffff880076474000 task.ti: ffff880076474000
[  122.170018] RIP: 0010:[<ffffffff81228844>]  [<ffffffff81228844>] d_absolute_path+0x44/0xa0
[  122.171525] RSP: 0018:ffff880076477b90  EFLAGS: 00010206
[  122.172462] RAX: ffff880080945fff RBX: 0000000000000000 RCX: 0000000001000000
[  122.173709] RDX: 0000000000ffffff RSI: ffff880080946000 RDI: ffff8800348a1010
[  122.174978] RBP: ffff880076477bb8 R08: ffff880076477c80 R09: 0000000000000000
[  122.176227] R10: 00007ffffffff000 R11: ffff88007f946000 R12: ffff88007f946000
[  122.177496] R13: ffff880076477c80 R14: ffff8800348a1010 R15: ffff8800348a2400
[  122.178745] FS:  00007fd459eb4700(0000) GS:ffff88007b6c0000(0000) knlGS:0000000000000000
[  122.180176] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  122.181186] CR2: ffff880080945fff CR3: 0000000073422000 CR4: 00000000001406e0
[  122.182469] Stack:
[  122.182843]  00ffffff00000001 ffff880080946000 0000000000000000 0000000000000000
[  122.184409]  00000000570f789c ffff880076477c30 ffffffff81385671 ffff88007a2e7a58
[  122.185810]  0000000000000000 ffff880076477c88 01000000008a1000 0000000000000000
[  122.187231] Call Trace:
[  122.187680]  [<ffffffff81385671>] aa_path_name+0x81/0x370
[  122.188637]  [<ffffffff813875dd>] profile_transition+0xbd/0xb80
[  122.190181]  [<ffffffff811af9bc>] ? zone_statistics+0x7c/0xa0
[  122.191674]  [<ffffffff81389b20>] apparmor_bprm_set_creds+0x9b0/0xac0
[  122.193288]  [<ffffffff812e1971>] ? ext4_xattr_get+0x81/0x220
[  122.194793]  [<ffffffff812e800c>] ? ext4_xattr_security_get+0x1c/0x30
[  122.196392]  [<ffffffff813449b9>] ? get_vfs_caps_from_disk+0x69/0x110
[  122.198004]  [<ffffffff81232d4f>] ? mnt_may_suid+0x3f/0x50
[  122.199737]  [<ffffffff81344b03>] ? cap_bprm_set_creds+0xa3/0x600
[  122.201377]  [<ffffffff81346e53>] security_bprm_set_creds+0x33/0x50
[  122.203024]  [<ffffffff81214ce5>] prepare_binprm+0x85/0x190
[  122.204515]  [<ffffffff81216545>] do_execveat_common.isra.33+0x485/0x710
[  122.206200]  [<ffffffff81216a6a>] SyS_execve+0x3a/0x50
[  122.207615]  [<ffffffff81838795>] stub_execve+0x5/0x5
[  122.208978]  [<ffffffff818384f2>] ? entry_SYSCALL_64_fastpath+0x16/0x71
[  122.210615] Code: f8 31 c0 48 63 c2 83 ea 01 48 c7 45 e8 00 00 00 00 48 01 c6 85 d2 48 c7 45 f0 00 00 00 00 48 89 75 e0 89 55 dc 78 0c 48 8d 46 ff <c6> 46 ff 00 48 89 45 e0 48 8d 55 e0 48 8d 4d dc 48 8d 75 e8 e8
[  122.217320] RIP  [<ffffffff81228844>] d_absolute_path+0x44/0xa0
[  122.218860]  RSP <ffff880076477b90>
[  122.219919] CR2: ffff880080945fff
[  122.220936] ---[ end trace 506cdbd85eb6c55e ]---

Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-04-07 08:58:36 +10:00
John Johansen
545de8fe0f apparmor: fix parameters so that the permission test is bypassed at boot
Boot parameters are written before apparmor is ready to answer whether
the user is policy_view_capable(). Setting the parameters at boot results
in an oops and failure to boot. Setting the parameters at boot is
obviously allowed so skip the permission check when apparmor is not
initialized.

While we are at it move the more complicated check to last.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-04-07 08:58:36 +10:00
John Johansen
b9b144bcaf apparmor: fix invalid reference to index variable of iterator line 836
Once the loop on lines 836-853 is complete and exits normally, ent is a
pointer to the dummy list head value.  The derefernces accessible from eg
the goto fail on line 860 or the various goto fail_lock's afterwards thus
seem incorrect.

Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-04-07 08:58:36 +10:00
Nicolas Iooss
9814448da7 apparmor: use SHASH_DESC_ON_STACK
When building the kernel with clang, the compiler fails to build
security/apparmor/crypto.c with the following error:

    security/apparmor/crypto.c:36:8: error: fields must have a constant
    size: 'variable length array in structure' extension will never be
    supported
                    char ctx[crypto_shash_descsize(apparmor_tfm)];
                         ^

Since commit a0a77af141 ("crypto: LLVMLinux: Add macro to remove use
of VLAIS in crypto code"), include/crypto/hash.h defines
SHASH_DESC_ON_STACK to work around this issue. Use it in aa_calc_hash()
and aa_calc_profile_hash().

Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-04-07 08:58:35 +10:00
Valentin Rothberg
eea7a05f19 security/apparmor/lsm.c: set debug messages
Add the _APPARMOR substring to reference the intended Kconfig option.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-04-07 08:58:35 +10:00
kbuild test robot
b9c42ac76e apparmor: fix boolreturn.cocci warnings
security/apparmor/lib.c:132:9-10: WARNING: return of 0/1 in function 'aa_policy_init' with return type bool

 Return statements in functions returning bool should use
 true/false instead of 1/0.
Generated by: scripts/coccinelle/misc/boolreturn.cocci

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-04-07 08:58:35 +10:00
James Morris
ca97d939db security: mark LSM hooks as __ro_after_init
Mark all of the registration hooks as __ro_after_init (via the
__lsm_ro_after_init macro).

Signed-off-by: James Morris <james.l.morris@oracle.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: Kees Cook <keescook@chromium.org>
2017-03-06 11:00:15 +11:00
Ingo Molnar
b2d0910310 sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>
We don't actually need the full rculist.h header in sched.h anymore,
we will be able to include the smaller rcupdate.h header instead.

But first update code that relied on the implicit header inclusion.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-02 08:42:38 +01:00
Ingo Molnar
5b825c3af1 sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
Add #include <linux/cred.h> dependencies to all .c files rely on sched.h
doing that for them.

Note that even if the count where we need to add extra headers seems high,
it's still a net win, because <linux/sched.h> is included in over
2,200 files ...

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-02 08:42:31 +01:00
Linus Torvalds
f1ef09fde1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull namespace updates from Eric Biederman:
 "There is a lot here. A lot of these changes result in subtle user
  visible differences in kernel behavior. I don't expect anything will
  care but I will revert/fix things immediately if any regressions show
  up.

  From Seth Forshee there is a continuation of the work to make the vfs
  ready for unpriviled mounts. We had thought the previous changes
  prevented the creation of files outside of s_user_ns of a filesystem,
  but it turns we missed the O_CREAT path. Ooops.

  Pavel Tikhomirov and Oleg Nesterov worked together to fix a long
  standing bug in the implemenation of PR_SET_CHILD_SUBREAPER where only
  children that are forked after the prctl are considered and not
  children forked before the prctl. The only known user of this prctl
  systemd forks all children after the prctl. So no userspace
  regressions will occur. Holding earlier forked children to the same
  rules as later forked children creates a semantic that is sane enough
  to allow checkpoing of processes that use this feature.

  There is a long delayed change by Nikolay Borisov to limit inotify
  instances inside a user namespace.

  Michael Kerrisk extends the API for files used to maniuplate
  namespaces with two new trivial ioctls to allow discovery of the
  hierachy and properties of namespaces.

  Konstantin Khlebnikov with the help of Al Viro adds code that when a
  network namespace exits purges it's sysctl entries from the dcache. As
  in some circumstances this could use a lot of memory.

  Vivek Goyal fixed a bug with stacked filesystems where the permissions
  on the wrong inode were being checked.

  I continue previous work on ptracing across exec. Allowing a file to
  be setuid across exec while being ptraced if the tracer has enough
  credentials in the user namespace, and if the process has CAP_SETUID
  in it's own namespace. Proc files for setuid or otherwise undumpable
  executables are now owned by the root in the user namespace of their
  mm. Allowing debugging of setuid applications in containers to work
  better.

  A bug I introduced with permission checking and automount is now
  fixed. The big change is to mark the mounts that the kernel initiates
  as a result of an automount. This allows the permission checks in sget
  to be safely suppressed for this kind of mount. As the permission
  check happened when the original filesystem was mounted.

  Finally a special case in the mount namespace is removed preventing
  unbounded chains in the mount hash table, and making the semantics
  simpler which benefits CRIU.

  The vfs fix along with related work in ima and evm I believe makes us
  ready to finish developing and merge fully unprivileged mounts of the
  fuse filesystem. The cleanups of the mount namespace makes discussing
  how to fix the worst case complexity of umount. The stacked filesystem
  fixes pave the way for adding multiple mappings for the filesystem
  uids so that efficient and safer containers can be implemented"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  proc/sysctl: Don't grab i_lock under sysctl_lock.
  vfs: Use upper filesystem inode in bprm_fill_uid()
  proc/sysctl: prune stale dentries during unregistering
  mnt: Tuck mounts under others instead of creating shadow/side mounts.
  prctl: propagate has_child_subreaper flag to every descendant
  introduce the walk_process_tree() helper
  nsfs: Add an ioctl() to return owner UID of a userns
  fs: Better permission checking for submounts
  exit: fix the setns() && PR_SET_CHILD_SUBREAPER interaction
  vfs: open() with O_CREAT should not create inodes with unknown ids
  nsfs: Add an ioctl() to return the namespace type
  proc: Better ownership of files for non-dumpable tasks in user namespaces
  exec: Remove LSM_UNSAFE_PTRACE_CAP
  exec: Test the ptracer's saved cred to see if the tracee can gain caps
  exec: Don't reset euid and egid when the tracee has CAP_SETUID
  inotify: Convert to using per-namespace limits
2017-02-23 20:33:51 -08:00
Linus Torvalds
c9341ee0af Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security layer updates from James Morris:
 "Highlights:

   - major AppArmor update: policy namespaces & lots of fixes

   - add /sys/kernel/security/lsm node for easy detection of loaded LSMs

   - SELinux cgroupfs labeling support

   - SELinux context mounts on tmpfs, ramfs, devpts within user
     namespaces

   - improved TPM 2.0 support"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (117 commits)
  tpm: declare tpm2_get_pcr_allocation() as static
  tpm: Fix expected number of response bytes of TPM1.2 PCR Extend
  tpm xen: drop unneeded chip variable
  tpm: fix misspelled "facilitate" in module parameter description
  tpm_tis: fix the error handling of init_tis()
  KEYS: Use memzero_explicit() for secret data
  KEYS: Fix an error code in request_master_key()
  sign-file: fix build error in sign-file.c with libressl
  selinux: allow changing labels for cgroupfs
  selinux: fix off-by-one in setprocattr
  tpm: silence an array overflow warning
  tpm: fix the type of owned field in cap_t
  tpm: add securityfs support for TPM 2.0 firmware event log
  tpm: enhance read_log_of() to support Physical TPM event log
  tpm: enhance TPM 2.0 PCR extend to support multiple banks
  tpm: implement TPM 2.0 capability to get active PCR banks
  tpm: fix RC value check in tpm2_seal_trusted
  tpm_tis: fix iTPM probe via probe_itpm() function
  tpm: Begin the process to deprecate user_read_timer
  tpm: remove tpm_read_index and tpm_write_index from tpm.h
  ...
2017-02-21 12:49:56 -08:00
James Morris
a2a15479d6 Merge branch 'stable-4.11' of git://git.infradead.org/users/pcmoore/selinux into next 2017-02-10 10:28:49 +11:00
Eric W. Biederman
9227dd2a84 exec: Remove LSM_UNSAFE_PTRACE_CAP
With previous changes every location that tests for
LSM_UNSAFE_PTRACE_CAP also tests for LSM_UNSAFE_PTRACE making the
LSM_UNSAFE_PTRACE_CAP redundant, so remove it.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2017-01-24 12:03:08 +13:00
Casey Schaufler
d69dece5f5 LSM: Add /sys/kernel/security/lsm
I am still tired of having to find indirect ways to determine
what security modules are active on a system. I have added
/sys/kernel/security/lsm, which contains a comma separated
list of the active security modules. No more groping around
in /proc/filesystems or other clever hacks.

Unchanged from previous versions except for being updated
to the latest security next branch.

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-01-19 13:18:29 +11:00
John Johansen
3ccb76c5df apparmor: fix undefined reference to `aa_g_hash_policy'
The kernel build bot turned up a bad config combination when
CONFIG_SECURITY_APPARMOR is y and CONFIG_SECURITY_APPARMOR_HASH is n,
resulting in the build error
   security/built-in.o: In function `aa_unpack':
   (.text+0x841e2): undefined reference to `aa_g_hash_policy'

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 13:21:27 -08:00
John Johansen
e6bfa25deb apparmor: replace remaining BUG_ON() asserts with AA_BUG()
AA_BUG() uses WARN and won't break the kernel like BUG_ON().

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:56 -08:00
John Johansen
2c17cd3681 apparmor: fix restricted endian type warnings for policy unpack
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:55 -08:00
John Johansen
e6e8bf4188 apparmor: fix restricted endian type warnings for dfa unpack
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:54 -08:00
John Johansen
ca4bd5ae0a apparmor: add check for apparmor enabled in module parameters missing it
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:53 -08:00
John Johansen
d4669f0b03 apparmor: add per cpu work buffers to avoid allocating buffers at every hook
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:53 -08:00
Tyler Hicks
e3ea1ca59a apparmor: sysctl to enable unprivileged user ns AppArmor policy loading
If this sysctl is set to non-zero and a process with CAP_MAC_ADMIN in
the root namespace has created an AppArmor policy namespace,
unprivileged processes will be able to change to a profile in the
newly created AppArmor policy namespace and, if the profile allows
CAP_MAC_ADMIN and appropriate file permissions, will be able to load
policy in the respective policy namespace.

Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:52 -08:00
William Hua
e025be0f26 apparmor: support querying extended trusted helper extra data
Allow a profile to carry extra data that can be queried via userspace.
This provides a means to store extra data in a profile that a trusted
helper can extract and use from live policy.

Signed-off-by: William Hua <william.hua@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:51 -08:00
John Johansen
12eb87d50b apparmor: update cap audit to check SECURITY_CAP_NOAUDIT
apparmor should be checking the SECURITY_CAP_NOAUDIT constant. Also
in complain mode make it so apparmor can elect to log a message,
informing of the check.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:50 -08:00
John Johansen
31f75bfecd apparmor: make computing policy hashes conditional on kernel parameter
Allow turning off the computation of the policy hashes via the
apparmor.hash_policy kernel parameter.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:50 -08:00
John Johansen
aa9a39ad8f apparmor: convert change_profile to use fqname later to give better control
Moving the use of fqname to later allows learning profiles to be based
on the fqname request instead of just the hname. It also allows cleaning
up some of the name parsing and lookup by allowing the use of
the fqlookupn_profile() lib fn.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:49 -08:00
John Johansen
c3e1e584ad apparmor: fix change_hat debug output
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:48 -08:00
John Johansen
5ef50d014c apparmor: remove unused op parameter from simple_write_to_buffer()
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:48 -08:00
John Johansen
ef88a7ac55 apparmor: change aad apparmor_audit_data macro to a fn macro
The aad macro can replace aad strings when it is not intended to. Switch
to a fn macro so it is only applied when intended.

Also at the same time cleanup audit_data initialization by putting
common boiler plate behind a macro, and dropping the gfp_t parameter
which will become useless.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:47 -08:00
John Johansen
47f6e5cc73 apparmor: change op from int to const char *
Having ops be an integer that is an index into an op name table is
awkward and brittle. Every op change requires an edit for both the
op constant and a string in the table. Instead switch to using const
strings directly, eliminating the need for the table that needs to
be kept in sync.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:46 -08:00
John Johansen
55a26ebf63 apparmor: rename context abreviation cxt to the more standard ctx
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:45 -08:00
John Johansen
a20aa95fbe apparmor: fail task profile update if current_cred isn't real_cred
Trying to update the task cred while the task current cred is not the
real cred will result in an error at the cred layer. Avoid this by
failing early and delaying the update.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:45 -08:00
John Johansen
b7fd2c0340 apparmor: add per policy ns .load, .replace, .remove interface files
Having per policy ns interface files helps with containers restoring
policy.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:44 -08:00
John Johansen
12dd7171d6 apparmor: pass the subject profile into profile replace/remove
This is just setup for new ns specific .load, .replace, .remove interface
files.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:43 -08:00
John Johansen
04dc715e24 apparmor: audit policy ns specified in policy load
Verify that profiles in a load set specify the same policy ns and
audit the name of the policy ns that policy is being loaded for.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:43 -08:00
John Johansen
5ac8c355ae apparmor: allow introspecting the loaded policy pre internal transform
Store loaded policy and allow introspecting it through apparmorfs. This
has several uses from debugging, policy validation, and policy checkpoint
and restore for containers.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:42 -08:00
John Johansen
fc1c9fd10a apparmor: add ns name to the audit data for policy loads
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:41 -08:00
John Johansen
078c73c63f apparmor: add profile and ns params to aa_may_manage_policy()
Policy management will be expanded beyond traditional unconfined root.
This will require knowning the profile of the task doing the management
and the ns view.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:40 -08:00
John Johansen
fd2a80438d apparmor: add ns being viewed as a param to policy_admin_capable()
Prepare for a tighter pairing of user namespaces and apparmor policy
namespaces, by making the ns to be viewed available.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:40 -08:00
John Johansen
2bd8dbbf22 apparmor: add ns being viewed as a param to policy_view_capable()
Prepare for a tighter pairing of user namespaces and apparmor policy
namespaces, by making the ns to be viewed available and checking
that the user namespace level is the same as the policy ns level.

This strict pairing will be relaxed once true support of user namespaces
lands.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:39 -08:00
John Johansen
a6f233003b apparmor: allow specifying the profile doing the management
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:38 -08:00
John Johansen
3e3e569539 apparmor: allow introspecting the policy namespace name
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:37 -08:00
John Johansen
b79473f2de apparmor: Make aa_remove_profile() callable from a different view
This is prep work for fs operations being able to remove namespaces.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:37 -08:00
John Johansen
ee2351e4b0 apparmor: track ns level so it can be used to help in view checks
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:36 -08:00
John Johansen
a71ada3058 apparmor: add special .null file used to "close" fds at exec
Borrow the special null device file from selinux to "close" fds that
don't have sufficient permissions at exec time.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:35 -08:00
John Johansen
34c426acb7 apparmor: provide userspace flag indicating binfmt_elf_mmap change
Commit 9f834ec18d ("binfmt_elf: switch to new creds when switching to new mm")
changed when the creds are installed by the binfmt_elf handler. This
affects which creds are used to mmap the executable into the address
space. Which can have an affect on apparmor policy.

Add a flag to apparmor at
/sys/kernel/security/apparmor/features/domain/fix_binfmt_elf_mmap

to make it possible to detect this semantic change so that the userspace
tools and the regression test suite can correctly deal with the change.

BugLink: http://bugs.launchpad.net/bugs/1630069
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:35 -08:00
John Johansen
11c236b89d apparmor: add a default null dfa
Instead of testing whether a given dfa exists in every code path, have
a default null dfa that is used when loaded policy doesn't provide a
dfa.

This will let us get rid of special casing and avoid dereference bugs
when special casing is missed.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:34 -08:00
John Johansen
6604d4c1c1 apparmor: allow policydb to be used as the file dfa
Newer policy will combine the file and policydb dfas, allowing for
better optimizations. However to support older policy we need to
keep the ability to address the "file" dfa separately. So dup
the policydb as if it is the file dfa and set the appropriate start
state.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:33 -08:00
John Johansen
293a4886f9 apparmor: add get_dfa() fn
The dfa is currently setup to be shared (has the basis of refcounting)
but currently can't be because the count can't be increased.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:32 -08:00
John Johansen
474d6b7510 apparmor: prepare to support newer versions of policy
Newer policy encodes more than just version in the version tag,
so add masking to make sure the comparison remains correct.

Note: this is fully compatible with older policy as it will never set
the bits being masked out.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:32 -08:00
John Johansen
5ebfb12822 apparmor: add support for force complain flag to support learning mode
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:31 -08:00
John Johansen
abbf873403 apparmor: remove paranoid load switch
Policy should always under go a full paranoid verification.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:30 -08:00
John Johansen
181f7c9776 apparmor: name null-XXX profiles after the executable
When possible its better to name a learning profile after the missing
profile in question. This allows for both more informative names and
for profile reuse.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:30 -08:00
John Johansen
30b026a8d1 apparmor: pass gfp_t parameter into profile allocation
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:29 -08:00
John Johansen
73688d1ed0 apparmor: refactor prepare_ns() and make usable from different views
prepare_ns() will need to be called from alternate views, and namespaces
will need to be created via different interfaces. So refactor and
allow specifying the view ns.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:28 -08:00
John Johansen
5fd1b95fc9 apparmor: update policy_destroy to use new debug asserts
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:27 -08:00
John Johansen
d102d89571 apparmor: pass gfp param into aa_policy_init()
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:27 -08:00
John Johansen
bbe4a7c873 apparmor: constify policy name and hname
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:26 -08:00
John Johansen
6e474e3063 apparmor: rename hname_tail to basename
Rename to the shorter and more familiar shell cmd name

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:25 -08:00
John Johansen
efeee83a70 apparmor: rename mediated_filesystem() to path_mediated_fs()
Rename to indicate the test is only about whether path mediation is used,
not whether other types of mediation might be used.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:24 -08:00
John Johansen
680cd62e91 apparmor: add debug assert AA_BUG and Kconfig to control debug info
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:24 -08:00
John Johansen
57e36bbd67 apparmor: add macro for bug asserts to check that a lock is held
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:23 -08:00
John Johansen
92b6d8eff5 apparmor: allow ns visibility question to consider subnses
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:22 -08:00
John Johansen
31617ddfdd apparmor: add fn to lookup profiles by fqname
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:22 -08:00
John Johansen
3b0aaf5866 apparmor: add lib fn to find the "split" for fqnames
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:21 -08:00
John Johansen
9a2d40c12d apparmor: add strn version of aa_find_ns
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:20 -08:00
John Johansen
1741e9eb8c apparmor: add strn version of lookup_profile fn
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:19 -08:00
John Johansen
8399588a7f apparmor: rename replacedby to proxy
Proxy is shorter and a better fit than replaceby, so rename it.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:18:19 -08:00
John Johansen
d97d51d253 apparmor: rename PFLAG_INVALID to PFLAG_STALE
Invalid does not convey the meaning of the flag anymore so rename it.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 01:16:37 -08:00
John Johansen
121d4a91e3 apparmor: rename sid to secid
Move to common terminology with other LSMs and kernel infrastucture

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 00:42:17 -08:00
John Johansen
98849dff90 apparmor: rename namespace to ns to improve code line lengths
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 00:42:16 -08:00
John Johansen
cff281f686 apparmor: split apparmor policy namespaces code into its own file
Policy namespaces will be diverging from profile management and
expanding so put it in its own file.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 00:42:15 -08:00
John Johansen
fe6bb31f59 apparmor: split out shared policy_XXX fns to lib
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 00:42:14 -08:00
John Johansen
12557dcba2 apparmor: move lib definitions into separate lib include
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16 00:42:13 -08:00
Kees Cook
8486adf0d7 apparmor: use designated initializers
Prepare to mark sensitive kernel structures for randomization by making
sure they're using designated initializers. These were identified during
allyesconfig builds of x86, arm, and arm64, with most initializer fixes
extracted from grsecurity.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-15 20:00:32 -08:00
Tetsuo Handa
a7f6c1b63b AppArmor: Use GFP_KERNEL for __aa_kvmalloc().
Calling kmalloc(GFP_NOIO) with order == PAGE_ALLOC_COSTLY_ORDER is not
recommended because it might fall into infinite retry loop without
invoking the OOM killer.

Since aa_dfa_unpack() is the only caller of kvzalloc() and
aa_dfa_unpack() which is calling kvzalloc() via unpack_table() is
doing kzalloc(GFP_KERNEL), it is safe to use GFP_KERNEL from
__aa_kvmalloc().

Since aa_simple_write_to_buffer() is the only caller of kvmalloc()
and aa_simple_write_to_buffer() is calling copy_from_user() which
is GFP_KERNEL context (see memdup_user_nul()), it is safe to use
GFP_KERNEL from __aa_kvmalloc().

Therefore, replace GFP_NOIO with GFP_KERNEL. Also, since we have
vmalloc() fallback, add __GFP_NORETRY so that we don't invoke the OOM
killer by kmalloc(GFP_KERNEL) with order == PAGE_ALLOC_COSTLY_ORDER.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-15 13:41:09 -08:00
Peter Zijlstra
6b1ffa06e5 locking/atomic, kref: Use kref_get_unless_zero() more
For some obscure reason apparmor thinks its needs to locally implement
kref primitives that already exist. Stop doing this.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-14 11:37:20 +01:00
Stephen Smalley
b21507e272 proc,security: move restriction on writing /proc/pid/attr nodes to proc
Processes can only alter their own security attributes via
/proc/pid/attr nodes.  This is presently enforced by each individual
security module and is also imposed by the Linux credentials
implementation, which only allows a task to alter its own credentials.
Move the check enforcing this restriction from the individual
security modules to proc_pid_attr_write() before calling the security hook,
and drop the unnecessary task argument to the security hook since it can
only ever be the current task.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
2017-01-09 10:07:31 -05:00
John Johansen
3d40658c97 apparmor: fix change_hat not finding hat after policy replacement
After a policy replacement, the task cred may be out of date and need
to be updated. However change_hat is using the stale profiles from
the out of date cred resulting in either: a stale profile being applied
or, incorrect failure when searching for a hat profile as it has been
migrated to the new parent profile.

Fixes: 01e2b670aa (failure to find hat)
Fixes: 898127c34e (stale policy being applied)
Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1000287
Cc: stable@vger.kernel.org
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2016-11-21 18:01:28 +11:00
Deepa Dinamani
078cd8279e fs: Replace CURRENT_TIME with current_time() for inode timestamps
CURRENT_TIME macro is not appropriate for filesystems as it
doesn't use the right granularity for filesystem timestamps.
Use current_time() instead.

CURRENT_TIME is also not y2038 safe.

This is also in preparation for the patch that transitions
vfs timestamps to use 64 bit time and hence make them
y2038 safe. As part of the effort current_time() will be
extended to do range checks. Hence, it is necessary for all
file system timestamps to use current_time(). Also,
current_time() will be transitioned along with vfs to be
y2038 safe.

Note that whenever a single call to current_time() is used
to change timestamps in different inodes, it is because they
share the same time granularity.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Felipe Balbi <balbi@kernel.org>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Acked-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-09-27 21:06:21 -04:00
Arnd Bergmann
7616ac70d1 apparmor: fix SECURITY_APPARMOR_HASH_DEFAULT parameter handling
The newly added Kconfig option could never work and just causes a build error
when disabled:

security/apparmor/lsm.c:675:25: error: 'CONFIG_SECURITY_APPARMOR_HASH_DEFAULT' undeclared here (not in a function)
 bool aa_g_hash_policy = CONFIG_SECURITY_APPARMOR_HASH_DEFAULT;

The problem is that the macro undefined in this case, and we need to use the IS_ENABLED()
helper to turn it into a boolean constant.

Another minor problem with the original patch is that the option is even offered
in sysfs when SECURITY_APPARMOR_HASH is not enabled, so this also hides the option
in that case.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 6059f71f1e ("apparmor: add parameter to control whether policy hashing is used")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2016-07-27 17:39:26 +10:00
John Johansen
d4d03f74a7 apparmor: fix arg_size computation for when setprocattr is null terminated
Signed-off-by: John Johansen <john.johansen@canonical.com>
2016-07-12 08:43:10 -07:00
Vegard Nossum
e89b808132 apparmor: fix oops, validate buffer size in apparmor_setprocattr()
When proc_pid_attr_write() was changed to use memdup_user apparmor's
(interface violating) assumption that the setprocattr buffer was always
a single page was violated.

The size test is not strictly speaking needed as proc_pid_attr_write()
will reject anything larger, but for the sake of robustness we can keep
it in.

SMACK and SELinux look safe to me, but somebody else should probably
have a look just in case.

Based on original patch from Vegard Nossum <vegard.nossum@oracle.com>
modified for the case that apparmor provides null termination.

Fixes: bb646cdb12
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: John Johansen <john.johansen@canonical.com>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Cc: stable@kernel.org
Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2016-07-12 08:43:10 -07:00
Heinrich Schuchardt
f4ee2def2d apparmor: do not expose kernel stack
Do not copy uninitalized fields th.td_hilen, th.td_data.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
58acf9d911 apparmor: fix module parameters can be changed after policy is locked
the policy_lock parameter is a one way switch that prevents policy
from being further modified. Unfortunately some of the module parameters
can effectively modify policy by turning off enforcement.

split policy_admin_capable into a view check and a full admin check,
and update the admin check to test the policy_lock parameter.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
5f20fdfed1 apparmor: fix oops in profile_unpack() when policy_db is not present
BugLink: http://bugs.launchpad.net/bugs/1592547

If unpack_dfa() returns NULL due to the dfa not being present,
profile_unpack() is not checking if the dfa is not present (NULL).

Signed-off-by: John Johansen <john.johansen@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
3197f5adf5 apparmor: don't check for vmalloc_addr if kvzalloc() failed
Signed-off-by: John Johansen <john.johansen@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
15756178c6 apparmor: add missing id bounds check on dfa verification
Signed-off-by: John Johansen <john.johansen@canonical.com>
2016-07-12 08:43:10 -07:00
Jeff Mahoney
ff118479a7 apparmor: allow SYS_CAP_RESOURCE to be sufficient to prlimit another task
While using AppArmor, SYS_CAP_RESOURCE is insufficient to call prlimit
on another task. The only other example of a AppArmor mediating access to
another, already running, task (ignoring fork+exec) is ptrace.

The AppArmor model for ptrace is that one of the following must be true:
1) The tracer is unconfined
2) The tracer is in complain mode
3) The tracer and tracee are confined by the same profile
4) The tracer is confined but has SYS_CAP_PTRACE

1), 2, and 3) are already true for setrlimit.

We can match the ptrace model just by allowing CAP_SYS_RESOURCE.

We still test the values of the rlimit since it can always be overridden
using a value that means unlimited for a particular resource.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2016-07-12 08:43:10 -07:00
Geliang Tang
38dbd7d8be apparmor: use list_next_entry instead of list_entry_next
list_next_entry has been defined in list.h, so I replace list_entry_next
with it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
de7c4cc947 apparmor: fix refcount race when finding a child profile
When finding a child profile via an rcu critical section, the profile
may be put and scheduled for deletion after the child is found but
before its refcount is incremented.

Protect against this by repeating the lookup if the profiles refcount
is 0 and is one its way to deletion.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
0b938a2e2c apparmor: fix ref count leak when profile sha1 hash is read
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
23ca7b640b apparmor: check that xindex is in trans_table bounds
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
f7da2de011 apparmor: ensure the target profile name is always audited
The target profile name was not being correctly audited in a few
cases because the target variable was not being set and gotos
passed the code to set it at apply:

Since it is always based on new_profile just drop the target var
and conditionally report based on new_profile.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
7ee6da25dc apparmor: fix audit full profile hname on successful load
Currently logging of a successful profile load only logs the basename
of the profile. This can result in confusion when a child profile has
the same name as the another profile in the set. Logging the hname
will ensure there is no confusion.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
bf15cf0c64 apparmor: fix log failures for all profiles in a set
currently only the profile that is causing the failure is logged. This
makes it more confusing than necessary about which profiles loaded
and which didn't. So make sure to log success and failure messages for
all profiles in the set being loaded.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
f351841f8d apparmor: fix put() parent ref after updating the active ref
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
6059f71f1e apparmor: add parameter to control whether policy hashing is used
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
bd35db8b8c apparmor: internal paths should be treated as disconnected
Internal mounts are not mounted anywhere and as such should be treated
as disconnected paths.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
f2e561d190 apparmor: fix disconnected bind mnts reconnection
Bind mounts can fail to be properly reconnected when PATH_CONNECT is
specified. Ensure that when PATH_CONNECT is specified the path has
a root.

BugLink: http://bugs.launchpad.net/bugs/1319984

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
d671e89020 apparmor: fix update the mtime of the profile file on replacement
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
9049a79221 apparmor: exec should not be returning ENOENT when it denies
The current behavior is confusing as it causes exec failures to report
the executable is missing instead of identifying that apparmor
caused the failure.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
b6b1b81b3a apparmor: fix uninitialized lsm_audit member
BugLink: http://bugs.launchpad.net/bugs/1268727

The task field in the lsm_audit struct needs to be initialized if
a change_hat fails, otherwise the following oops will occur

BUG: unable to handle kernel paging request at 0000002fbead7d08
IP: [<ffffffff8171153e>] _raw_spin_lock+0xe/0x50
PGD 1e3f35067 PUD 0
Oops: 0002 [#1] SMP
Modules linked in: pppox crc_ccitt p8023 p8022 psnap llc ax25 btrfs raid6_pq xor xfs libcrc32c dm_multipath scsi_dh kvm_amd dcdbas kvm microcode amd64_edac_mod joydev edac_core psmouse edac_mce_amd serio_raw k10temp sp5100_tco i2c_piix4 ipmi_si ipmi_msghandler acpi_power_meter mac_hid lp parport hid_generic usbhid hid pata_acpi mpt2sas ahci raid_class pata_atiixp bnx2 libahci scsi_transport_sas [last unloaded: tipc]
CPU: 2 PID: 699 Comm: changehat_twice Tainted: GF          O 3.13.0-7-generic #25-Ubuntu
Hardware name: Dell Inc. PowerEdge R415/08WNM9, BIOS 1.8.6 12/06/2011
task: ffff8802135c6000 ti: ffff880212986000 task.ti: ffff880212986000
RIP: 0010:[<ffffffff8171153e>]  [<ffffffff8171153e>] _raw_spin_lock+0xe/0x50
RSP: 0018:ffff880212987b68  EFLAGS: 00010006
RAX: 0000000000020000 RBX: 0000002fbead7500 RCX: 0000000000000000
RDX: 0000000000000292 RSI: ffff880212987ba8 RDI: 0000002fbead7d08
RBP: ffff880212987b68 R08: 0000000000000246 R09: ffff880216e572a0
R10: ffffffff815fd677 R11: ffffea0008469580 R12: ffffffff8130966f
R13: ffff880212987ba8 R14: 0000002fbead7d08 R15: ffff8800d8c6b830
FS:  00002b5e6c84e7c0(0000) GS:ffff880216e40000(0000) knlGS:0000000055731700
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000002fbead7d08 CR3: 000000021270f000 CR4: 00000000000006e0
Stack:
 ffff880212987b98 ffffffff81075f17 ffffffff8130966f 0000000000000009
 0000000000000000 0000000000000000 ffff880212987bd0 ffffffff81075f7c
 0000000000000292 ffff880212987c08 ffff8800d8c6b800 0000000000000026
Call Trace:
 [<ffffffff81075f17>] __lock_task_sighand+0x47/0x80
 [<ffffffff8130966f>] ? apparmor_cred_prepare+0x2f/0x50
 [<ffffffff81075f7c>] do_send_sig_info+0x2c/0x80
 [<ffffffff81075fee>] send_sig_info+0x1e/0x30
 [<ffffffff8130242d>] aa_audit+0x13d/0x190
 [<ffffffff8130c1dc>] aa_audit_file+0xbc/0x130
 [<ffffffff8130966f>] ? apparmor_cred_prepare+0x2f/0x50
 [<ffffffff81304cc2>] aa_change_hat+0x202/0x530
 [<ffffffff81308fc6>] aa_setprocattr_changehat+0x116/0x1d0
 [<ffffffff8130a11d>] apparmor_setprocattr+0x25d/0x300
 [<ffffffff812cee56>] security_setprocattr+0x16/0x20
 [<ffffffff8121fc87>] proc_pid_attr_write+0x107/0x130
 [<ffffffff811b7604>] vfs_write+0xb4/0x1f0
 [<ffffffff811b8039>] SyS_write+0x49/0xa0
 [<ffffffff8171a1bf>] tracesys+0xe1/0xe6

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
ec34fa24a9 apparmor: fix replacement bug that adds new child to old parent
When set atomic replacement is used and the parent is updated before the
child, and the child did not exist in the old parent so there is no
direct replacement then the new child is incorrectly added to the old
parent. This results in the new parent not having the child(ren) that
it should and the old parent when being destroyed asserting the
following error.

AppArmor: policy_destroy: internal error, policy '<profile/name>' still
contains profiles

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
John Johansen
dcda617a0c apparmor: fix refcount bug in profile replacement
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
2016-07-12 08:43:10 -07:00
Al Viro
3ccee46ab4 constify security_path_{link,rename}
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-28 00:47:36 -04:00
Al Viro
8db0185659 apparmor: remove useless checks for NULL ->mnt
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-28 00:47:28 -04:00
Al Viro
d360775217 constify security_path_{mkdir,mknod,symlink}
... as well as unix_mknod() and may_o_create()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-28 00:47:27 -04:00
Al Viro
989f74e050 constify security_path_{unlink,rmdir}
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-28 00:47:27 -04:00
Al Viro
d6b49f7ad2 apparmor: constify common_perm_...()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-28 00:47:26 -04:00