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J. Bruce Fields ea053e164c nfsd: escape high characters in binary data 
I'm exposing some information about NFS clients in pseudofiles.  I
expect to eventually have simple tools to help read those pseudofiles.

But it's also helpful if the raw files are human-readable to the extent
possible.  It aids debugging and makes them usable on systems that don't
have the latest nfs-utils.

A minor challenge there is opaque client-generated protocol objects like
state owners and client identifiers.  Some clients generate those to
include handy information in plain ascii.  But they may also include
arbitrary byte sequences.

I think the simplest approach is to limit to isprint(c) && isascii(c)
and escape everything else.

That means you can just cat the file and get something that looks OK.
Also, I'm trying to keep these files legal YAML, which requires them to
UTF-8, and this is a simple way to guarantee that.

Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-07-03 17:52:50 -04:00
..
842 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
fonts treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
livepatch livepatch: Proper error handling in the shadow variables selftest 2019-02-06 11:01:57 +01:00
lz4 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
lzo treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
math treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mpi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 26 2019-05-24 17:27:10 +02:00
raid6 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 83 2019-05-24 17:37:52 +02:00
reed_solomon treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
xz treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zlib_deflate treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zlib_inflate treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zstd treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
.gitignore lib: add crc64 calculation routines 2018-08-22 10:52:48 -07:00
argv_split.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
ashldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ashrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
asn1_decoder.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
assoc_array.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
atomic64_test.c
atomic64.c atomics/generic: Define atomic64_fetch_add_unless() 2018-06-21 14:25:21 +02:00
audit.c
bcd.c
bch.c lib/bch: fix possible stack overrun 2018-10-12 09:17:46 +02:00
bitmap.c lib: rework bitmap_parselist 2019-05-14 19:52:49 -07:00
bitrev.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
bsearch.c kprobes: Prohibit probing on bsearch() 2019-02-13 08:16:41 +01:00
btree.c btree: avoid variable-length allocations 2018-03-14 16:55:29 -07:00
bucket_locks.c ila: make lockdep happy again 2018-08-16 12:14:42 -07:00
bug.c lib/bug.c: exclude non-BUG/WARN exceptions from report_bug() 2018-03-09 16:40:01 -08:00
build_OID_registry treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
bust_spinlocks.c s390: use common bust_spinlocks() 2018-11-30 07:22:05 +01:00
chacha.c crypto: chacha - add XChaCha12 support 2018-11-20 14:26:55 +08:00
check_signature.c
checksum.c
clz_ctz.c
clz_tab.c
cmdline.c lib/cmdline.c: mark expected switch fall-throughs 2019-04-08 18:39:23 -05:00
cmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
compat_audit.c
cpu_rmap.c
cpumask.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
crc4.c
crc7.c
crc8.c
crc16.c
crc32.c lib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases as __pure 2019-02-15 19:50:07 +01:00
crc32defs.h lib/crc: Move polynomial definition to separate header 2018-07-27 19:04:33 +08:00
crc32test.c
crc64.c lib: add crc64 calculation routines 2018-08-22 10:52:48 -07:00
ctype.c
debug_info.c
debug_locks.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
debugobjects.c debugobjects: call debug_objects_mem_init eariler 2018-12-28 12:11:45 -08:00
dec_and_lock.c atomic: Add irqsave variant of atomic_dec_and_lock() 2018-06-12 23:33:24 +02:00
decompress_bunzip2.c lib: Use existing define with polynomial 2018-07-27 19:16:38 +08:00
decompress_inflate.c
decompress_unlz4.c
decompress_unlzma.c
decompress_unlzo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 95 2019-05-24 17:37:53 +02:00
decompress_unxz.c
decompress.c
devres.c devres: always use dev_name() in devm_ioremap_resource() 2019-01-31 19:28:40 +01:00
digsig.c crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
dump_stack.c printk: move dump stack related code to lib/dump_stack.c 2018-03-15 13:25:36 +01:00
dynamic_debug.c RDMA/core: Introduce RDMA subsystem ibdev_* print functions 2019-05-01 12:29:28 -04:00
dynamic_queue_limits.c
earlycpio.c
error-inject.c treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively 2019-04-09 14:19:06 +02:00
errseq.c errseq: Always report a writeback error once 2018-04-27 08:51:26 -04:00
extable.c
fault-inject.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
fdt_empty_tree.c
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
fdt.c
find_bit_benchmark.c lib/find_bit_benchmark.c: align test_find_next_and_bit with others 2019-01-04 13:13:46 -08:00
find_bit.c lib: optimize cpumask_next_and() 2018-02-06 18:32:44 -08:00
flex_proportions.c
gen_crc32table.c lib/crc: Use consistent naming for CRC-32 polynomials 2018-07-27 19:04:33 +08:00
gen_crc64table.c lib: don't depend on linux headers being installed. 2018-12-29 11:36:44 -08:00
genalloc.c lib/genalloc.c: include vmalloc.h 2019-01-05 13:54:53 -08:00
generic-radix-tree.c generic radix trees 2019-03-12 10:04:02 -07:00
glob.c
globtest.c
hexdump.c
hweight.c x86/kconfig: Disable CONFIG_GENERIC_HWEIGHT and remove __HAVE_ARCH_SW_HWEIGHT 2019-05-13 11:07:33 +02:00
idr.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
inflate.c
interval_tree_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
interval_tree.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
iomap_copy.c
iomap.c iomap: introduce io{read|write}64_{lo_hi|hi_lo} 2019-01-22 13:39:59 +01:00
iommu-helper.c iommu-helper: mark iommu_is_span_boundary as inline 2018-05-09 06:55:44 +02:00
ioremap.c lib/ioremap: ensure break-before-make is used for huge p4d mappings 2018-12-28 12:11:50 -08:00
iov_iter.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
irq_poll.c lib/irq_poll: Support schedules in non-interrupt contexts 2019-02-19 20:52:19 -07:00
irq_regs.c
is_single_threaded.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
jedec_ddr_data.c
kasprintf.c
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.debug treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.kasan treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.kgdb treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.ubsan treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
kfifo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
klist.c scsi: klist: Make it safe to use klists in atomic context 2018-07-02 16:20:23 -04:00
kobject_uevent.c kobject: Don't trigger kobject_uevent(KOBJ_REMOVE) twice. 2019-04-01 07:37:12 +02:00
kobject.c kobject: clean up the kobject add documentation a bit more 2019-05-03 08:26:51 +02:00
kstrtox.c lib/kstrtox.c: delete unnecessary casts 2018-10-31 08:54:13 -07:00
kstrtox.h
libcrc32c.c crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
list_debug.c lib/list_debug.c: print unmangled addresses 2018-04-11 10:28:35 -07:00
list_sort.c lib/list_sort: optimize number of calls to comparison function 2019-05-14 19:52:49 -07:00
llist.c
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-rtmutex.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c locking/lockdep: Make it easy to detect whether or not inside a selftest 2019-02-28 07:55:43 +01:00
lockref.c lockref: Add lockref_put_not_zero 2018-04-12 09:41:19 -07:00
logic_pio.c lib: Add generic PIO mapping method 2018-03-21 17:18:34 -05:00
lru_cache.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 91 2019-05-24 17:37:53 +02:00
lshrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
Makefile lib: Move mathematic helpers to separate folder 2019-05-14 19:52:49 -07:00
memcat_p.c lib: Fix ia64 bootloader linkage 2018-10-16 13:45:44 +02:00
memory-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
memweight.c
muldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
net_utils.c
netdev-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nlattr.c netlink: add validation of NLA_F_NESTED flag 2019-05-04 01:27:11 -04:00
nmi_backtrace.c printk/nmi: Prevent deadlock when accessing the main log buffer in NMI 2018-07-09 14:10:40 +02:00
nodemask.c
notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
notifier-error-inject.h
objagg.c lib: objagg: fix handling of object with 0 users when assembling hints 2019-02-14 12:41:54 -05:00
of-reconfig-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
oid_registry.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
once.c
packing.c lib: Add support for generic packing operations 2019-05-03 10:49:17 -04:00
parman.c
parser.c lib/parser.c: switch match_number() over to use match_strdup() 2018-10-31 08:54:12 -07:00
pci_iomap.c
percpu_counter.c notifier: Remove notifier header file wherever not used 2018-08-30 12:56:40 +02:00
percpu_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
percpu-refcount.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
plist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 10 2019-05-21 11:28:45 +02:00
pm-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
radix-tree.c radix tree: Don't return retry entries from lookup 2018-12-06 08:26:16 -05:00
random32.c lib: Correct comment of prandom_seed 2019-05-17 11:32:47 -07:00
ratelimit.c
rbtree_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
rbtree.c
refcount.c refcount_t: Add ACQUIRE ordering on success for dec(sub)_and_test() variants 2019-02-04 09:03:31 +01:00
rhashtable.c rhashtable: Fix cmpxchg RCU warnings 2019-05-16 09:45:20 -07:00
sbitmap.c sbitmap: fix improper use of smp_mb__before_atomic() 2019-05-23 10:25:26 -06:00
scatterlist.c lib/scatterlist: Provide a DMA page iterator 2019-02-11 15:02:33 -07:00
seq_buf.c seq_buf: Use size_t for len in seq_buf_puts() 2018-12-22 08:21:03 -05:00
sg_pool.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
sg_split.c
sha1.c
sha256.c kernel/kexec_file.c: move purgatories sha256 to common code 2018-04-13 17:10:28 -07:00
show_mem.c lib/show_mem.c: drop pgdat_resize_lock in show_mem() 2018-12-28 12:11:49 -08:00
siphash.c lib/siphash.c: mark expected switch fall-throughs 2019-04-25 19:47:24 +02:00
smp_processor_id.c kprobes: Prohibit probing on preemption checking debug functions 2019-02-13 08:16:40 +01:00
sort.c lib/sort: avoid indirect calls to built-in swap 2019-05-14 19:52:49 -07:00
stackdepot.c lib/stackdepot: Remove obsolete functions 2019-04-29 12:37:57 +02:00
stmp_device.c
string_helpers.c nfsd: escape high characters in binary data 2019-07-03 17:52:50 -04:00
string.c lib/string: Add strscpy_pad() function 2019-04-08 16:44:21 -06:00
strncpy_from_user.c mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions 2019-04-24 12:19:45 +02:00
strnlen_user.c mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions 2019-04-24 12:19:45 +02:00
syscall.c syscalls: Remove start and number from syscall_get_arguments() args 2019-04-05 09:26:43 -04:00
test_bitfield.c bitfield: add tests 2018-06-27 18:58:49 +03:00
test_bitmap.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_bpf.c bpf: test_bpf: turn off preemption in function __run_once 2019-02-25 22:18:07 +01:00
test_debug_virtual.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_firmware.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_hash.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_hexdump.c test_hexdump: use memcpy instead of strncpy 2018-11-30 12:13:15 -08:00
test_ida.c test_ida: Fix lockdep warning 2018-10-15 16:31:29 -04:00
test_kasan.c kasan: remove use after scope bugs detection. 2019-03-05 21:07:13 -08:00
test_kmod.c lib/test_kmod.c: potential double free in error handling 2019-02-01 15:46:23 -08:00
test_list_sort.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_memcat_p.c lib: Fix ia64 bootloader linkage 2018-10-16 13:45:44 +02:00
test_module.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_objagg.c test_objagg: Uninitialized variable in error handling 2019-02-13 22:13:29 -08:00
test_overflow.c test_overflow: Add shift overflow tests 2018-08-08 09:47:26 -06:00
test_parman.c
test_printf.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_rhashtable.c rhashtable: move dereference inside rht_ptr() 2019-04-12 17:34:45 -07:00
test_siphash.c
test_sort.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_stackinit.c lib: Introduce test_stackinit module 2019-03-04 09:29:52 -08:00
test_static_key_base.c
test_static_keys.c
test_string.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_strscpy.c lib: Add test module for strscpy_pad 2019-04-08 16:44:21 -06:00
test_sysctl.c tools/testing/selftests/sysctl/sysctl.sh: add proc_do_large_bitmap() test case 2019-05-14 19:52:51 -07:00
test_ubsan.c lib/test_ubsan.c: VLA no longer used in kernel 2019-03-07 18:32:00 -08:00
test_user_copy.c treewide: simplify Kconfig dependencies for removed archs 2018-03-26 15:55:57 +02:00
test_uuid.c
test_vmalloc.c lib/test_vmalloc.c:test_func(): eliminate local `ret' 2019-05-14 19:52:49 -07:00
test_xarray.c XArray: Fix xa_reserve for 2-byte aligned entries 2019-02-21 17:54:44 -05:00
test-kstrtox.c
test-string_helpers.c
textsearch.c textsearch: fix kernel-doc warnings and add kernel-api section 2018-04-16 18:53:13 -04:00
timerqueue.c
ts_bm.c
ts_fsm.c
ts_kmp.c
ubsan.c Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-06 11:39:17 -07:00
ubsan.h ubsan: Remove vla bound checks. 2019-05-06 11:12:09 -07:00
ucmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ucs2_string.c lib/ucs2_string.c: add MODULE_LICENSE() 2018-06-07 17:34:39 -07:00
usercopy.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
uuid.c
vsprintf.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
win_minmax.c
xarray.c XArray: Fix xa_reserve for 2-byte aligned entries 2019-02-21 17:54:44 -05:00
xxhash.c