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Linus Torvalds 81429eb8d9 arm64 fix for 5.4
- Ensure PAN is re-enabled following user fault in uaccess routines
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fix from Will Deacon:
 "Ensure PAN is re-enabled following user fault in uaccess routines.

  After I thought we were done for 5.4, we had a report this week of a
  nasty issue that has been shown to leak data between different user
  address spaces thanks to corruption of entries in the TLB. In
  hindsight, we should have spotted this in review when the PAN code was
  merged back in v4.3, but hindsight is 20/20 and I'm trying not to beat
  myself up too much about it despite being fairly miserable.

  Anyway, the fix is "obvious" but the actual failure is more more
  subtle, and is described in the commit message. I've included a fairly
  mechanical follow-up patch here as well, which moves this checking out
  into the C wrappers which is what we do for {get,put}_user() already
  and allows us to remove these bloody assembly macros entirely. The
  patches have passed kernelci [1] [2] [3] and CKI [4] tests over night,
  as well as some targetted testing [5] for this particular issue.

  The first patch is tagged for stable and should be applied to 4.14,
  4.19 and 5.3. I have separate backports for 4.4 and 4.9, which I'll
  send out once this has landed in your tree (although the original
  patch applies cleanly, it won't build for those two trees).

  Thanks to Pavel Tatashin for reporting this and Mark Rutland for
  helping to diagnose the issue and review/test the solution"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: uaccess: Remove uaccess_*_not_uao asm macros
  arm64: uaccess: Ensure PAN is re-enabled after unhandled uaccess fault
2019-11-21 12:15:24 -08:00
arch arm64 fix for 5.4 2019-11-21 12:15:24 -08:00
block iocost: check active_list of all the ancestors in iocg_activate() 2019-11-14 13:56:54 -07:00
certs PKCS#7: Refactor verify_pkcs7_signature() 2019-08-05 18:40:18 -04:00
crypto Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
Documentation Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-12 10:53:24 -08:00
drivers for-linus-20191121 2019-11-21 12:04:50 -08:00
fs afs: Fix missing timeout reset 2019-11-19 14:36:38 -08:00
include IOMMU Fixes for Linux v5.4-rc7 2019-11-17 11:27:44 -08:00
init Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
ipc ipc/sem.c: convert to use built-in RCU list checking 2019-09-25 17:51:41 -07:00
kernel fork: fix pidfd_poll()'s return type 2019-11-20 11:48:50 +01:00
lib lib/xz: fix XZ_DYNALLOC to avoid useless memory reallocations 2019-11-15 18:34:00 -08:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
mm mm/debug.c: PageAnon() is true for PageKsm() pages 2019-11-15 18:34:00 -08:00
net ipmr: Fix skb headroom in ipmr_get_route(). 2019-11-16 13:06:54 -08:00
samples samples/bpf: fix build by setting HAVE_ATTR_TEST to zero 2019-10-31 21:39:15 +01:00
scripts arm64 fix for -rc8 / final 2019-11-15 09:14:23 -08:00
security efi/efi_test: Lock down /dev/efi_test and require CAP_SYS_ADMIN 2019-10-31 09:40:21 +01:00
sound ALSA: usb-audio: Fix incorrect size check for processing/extension units 2019-11-14 18:01:22 +01:00
tools GPIO fixes for v5.4: 2019-11-21 12:01:30 -08:00
usr kbuild: update compile-test header list for v5.4-rc2 2019-10-05 15:29:49 +09:00
virt KVM: Add a comment describing the /dev/kvm no_compat handling 2019-11-15 10:14:04 +01:00
.clang-format clang-format: Update with the latest for_each macro list 2019-08-31 10:00:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Modules updates for v5.4 2019-09-22 10:34:46 -07:00
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
Kbuild kbuild: do not descend to ./Kbuild when cleaning 2019-08-21 21:03:58 +09:00
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS IOMMU Fixes for Linux v5.4-rc7 2019-11-17 11:27:44 -08:00
Makefile Linux 5.4-rc8 2019-11-17 14:47:30 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.