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Tobin C. Harding 651b709117 lib/string: Add strscpy_pad() function 
[ Upstream commit 458a3bf82df4fe1f951d0f52b1e0c1e9d5a88a3b ]

We have a function to copy strings safely and we have a function to copy
strings and zero the tail of the destination (if source string is
shorter than destination buffer) but we do not have a function to do
both at once.  This means developers must write this themselves if they
desire this functionality.  This is a chore, and also leaves us open to
off by one errors unnecessarily.

Add a function that calls strscpy() then memset()s the tail to zero if
the source string is shorter than the destination buffer.

Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tobin C. Harding <tobin@kernel.org>
Signed-off-by: Shuah Khan <shuah@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-02-23 13:58:12 +01:00
..
842
crypto: 842 - Add CRC and validation support
2015-10-14 22:23:17 +08:00
fonts
Fonts: Replace discarded const qualifier
2020-11-10 10:22:19 +01:00
lz4
lib: lz4: fixed zram with lz4 on big endian machines
2016-05-04 14:48:41 -07:00
lzo
…
mpi
lib/mpi: Fix 64-bit MIPS build with Clang
2020-06-20 10:23:20 +02:00
raid6
lib: raid6: fix awk build warnings
2019-12-21 10:35:22 +01:00
reed_solomon
rslib: Fix handling of of caller provided syndrome
2019-08-04 09:34:48 +02:00
xz
…
zlib_deflate
zlib_deflate/deftree: remove bi_reverse()
2015-09-10 13:29:01 -07:00
zlib_inflate
lib/zlib: remove outdated and incorrect pre-increment optimization
2020-06-29 20:07:53 -04:00
.gitignore
…
argv_split.c
…
asn1_decoder.c
ASN.1: check for error from ASN1_OP_END__ACT actions
2017-12-16 10:33:48 +01:00
assoc_array.c
assoc_array: Fix shortcut creation
2019-03-23 08:44:33 +01:00
atomic64_test.c
x86/cpufeature: Carve out X86_FEATURE_*
2018-07-17 11:31:44 +02:00
atomic64.c
atomic: Provide atomic_{or,xor,and}
2015-07-27 14:06:24 +02:00
audit.c
…
bcd.c
…
bch.c
…
bitmap.c
bitmap: Add bitmap_alloc(), bitmap_zalloc() and bitmap_free()
2020-01-29 10:21:52 +01:00
bitrev.c
ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction
2014-12-22 16:43:06 +00:00
bsearch.c
kprobes: Prohibit probing on bsearch()
2019-04-27 09:33:51 +02:00
btree.c
treewide: Remove old email address
2015-11-23 09:44:58 +01:00
bug.c
module: Sanitize RCU usage and locking
2015-05-28 11:31:52 +09:30
build_OID_registry
…
bust_spinlocks.c
…
check_signature.c
…
checksum.c
lib/checksum.c: fix build for generic csum_tcpudp_nofold
2015-01-29 11:57:38 -08:00
clz_ctz.c
…
clz_tab.c
…
cmdline.c
lib/cmdline.c: fix get_options() overflow while parsing ranges
2017-06-29 12:48:51 +02:00
compat_audit.c
…
cordic.c
…
cpu_rmap.c
sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask()
2015-05-27 15:22:15 +02:00
cpu-notifier-error-inject.c
…
cpumask.c
sched/fair, cpumask: Export for_each_cpu_wrap()
2020-05-27 16:40:27 +02:00
crc7.c
…
crc8.c
…
crc16.c
…
crc32.c
lib/crc32.c: fix trivial typo in preprocessor condition
2020-10-29 09:03:06 +01:00
crc32defs.h
…
crc-ccitt.c
…
crc-itu-t.c
lib: crc-itu-t.[ch] fix 0x0x prefix in integer constants
2015-05-26 15:26:43 +02:00
crc-t10dif.c
lib: introduce crc_t10dif_update()
2015-05-30 22:42:24 -07:00
ctype.c
…
debug_info.c
kbuild: include core debug info when DEBUG_INFO_REDUCED
2015-06-11 15:08:32 +02:00
debug_locks.c
locking/lockdep: Fix debug_locks off performance problem
2018-11-21 09:27:31 +01:00
debugobjects.c
debugobjects: avoid recursive calls with kmemleak
2018-12-17 21:55:12 +01:00
dec_and_lock.c
…
decompress_bunzip2.c
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
decompress_inflate.c
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
decompress_unlz4.c
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
decompress_unlzma.c
lib/decompress_unlzma: Do a NULL check for pointer
2015-09-10 13:29:01 -07:00
decompress_unlzo.c
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
decompress_unxz.c
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
decompress.c
lib/decompress: set the compressor name to NULL on error
2015-07-17 16:39:54 -07:00
devres.c
devres: allow const resource arguments
2020-01-29 10:21:45 +01:00
digsig.c
lib/digsig: fix dereference of NULL user_key_payload
2017-10-27 10:23:17 +02:00
div64.c
lib/div64.c: off by one in shift
2019-04-27 09:33:59 +02:00
dma-debug.c
dma-debug: add a schedule point in debug_dma_dump_mappings()
2020-01-04 13:34:27 +01:00
dump_stack.c
dump_stack: avoid the livelock of the dump_lock
2019-11-12 19:13:19 +01:00
dynamic_debug.c
dyndbg: fix a BUG_ON in ddebug_describe_flags
2020-08-21 10:52:59 +02:00
dynamic_queue_limits.c
lib/dynamic_queue_limits.c: simplify includes
2015-02-12 18:54:15 -08:00
earlycpio.c
…
extable.c
…
fault-inject.c
fault-inject: fix inverted interval/probability values in printk
2015-10-23 17:55:10 +09:00
fdt_empty_tree.c
…
fdt_ro.c
…
fdt_rw.c
…
fdt_strerror.c
…
fdt_sw.c
…
fdt_wip.c
…
fdt.c
…
find_bit.c
lib: rename lib/find_next_bit.c to lib/find_bit.c
2015-04-17 09:03:54 -04:00
flex_array.c
…
flex_proportions.c
…
gcd.c
…
gen_crc32table.c
lib: crc32: constify crc32 lookup table
2015-02-13 21:21:35 -08:00
genalloc.c
lib/genalloc: fix the overflow when size is too big
2021-01-12 19:47:54 +01:00
glob.c
…
halfmd4.c
lib/halfmd4.c: use rol32 inline function in the ROUND macro
2015-11-06 17:50:42 -08:00
hexdump.c
lib/hexdump.c: truncate output in case of overflow
2015-11-06 17:50:42 -08:00
hweight.c
x86/hweight: Get rid of the special calling convention
2018-04-24 09:32:04 +02:00
idr.c
mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd
2015-11-06 17:50:42 -08:00
inflate.c
…
int_sqrt.c
lib/int_sqrt: optimize initial value compute
2019-04-27 09:33:47 +02:00
interval_tree_test.c
lib/interval_tree_test.c: allow users to limit scope of endpoint
2018-12-21 14:09:49 +01:00
interval_tree.c
lib/interval_tree.c: simplify includes
2015-02-12 18:54:15 -08:00
iomap_copy.c
…
iomap.c
…
iommu-common.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
2015-11-05 16:34:48 -08:00
iommu-helper.c
…
ioremap.c
ioremap: Update pgtable free interfaces with addr
2018-08-17 20:56:45 +02:00
iov_iter.c
fix iov_iter_fault_in_readable()
2016-09-24 10:07:43 +02:00
irq_regs.c
…
is_single_threaded.c
lib/is_single_threaded.c: change current_is_single_threaded() to use for_each_thread()
2015-11-06 17:50:42 -08:00
jedec_ddr_data.c
…
kasprintf.c
lib/kasprintf.c: introduce kvasprintf_const
2015-11-06 17:50:42 -08:00
Kconfig
lib: sw842: select crc32
2016-03-03 15:07:24 -08:00
Kconfig.debug
kmemleak: increase DEBUG_KMEMLEAK_EARLY_LOG_SIZE default to 16K
2019-10-07 21:01:03 +02:00
Kconfig.kasan
mm, slub, kasan: enable user tracking by default with KASAN=y
2015-11-05 19:34:48 -08:00
Kconfig.kgdb
…
Kconfig.kmemcheck
…
kfifo.c
Partially revert "kfifo: fix kfifo_alloc() and kfifo_init()"
2020-01-29 10:21:47 +01:00
klist.c
scsi: klist: Make it safe to use klists in atomic context
2018-10-10 08:52:05 +02:00
kobject_uevent.c
lib/kobject_uevent.c: remove redundant include
2015-02-12 18:54:15 -08:00
kobject.c
kobject: Export kobject_get_unless_zero()
2020-01-14 20:02:59 +01:00
kstrtox.c
lib: add "on"/"off" support to kstrtobool
2016-10-28 03:01:31 -04:00
kstrtox.h
…
lcm.c
block: fix blk_stack_limits() regression due to lcm() change
2015-03-31 09:45:50 -06:00
libcrc32c.c
crypto: crc32c - Fix crc32c soft dependency
2016-02-17 12:31:04 -08:00
list_debug.c
…
list_sort.c
lib/list_sort: use late_initcall to hook in self tests
2015-06-16 14:12:35 -04:00
llist.c
lib/llist.c: fix data race in llist_del_first
2015-11-06 17:50:42 -08:00
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-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
…
lockref.c
locking/lockref: Remove homebrew cmpxchg64_relaxed() macro definition
2015-08-12 11:59:04 +02:00
lru_cache.c
lru_cache: remove use of seq_printf return value
2015-04-15 16:35:25 -07:00
Makefile
siphash: add cryptographically secure PRF
2019-09-06 10:18:12 +02:00
md5.c
lib/md5.c: simplify include
2015-02-12 18:54:15 -08:00
memory-notifier-error-inject.c
…
memweight.c
…
net_utils.c
…
nlattr.c
netlink: pad nla_memcpy dest buffer with zeroes
2015-03-31 14:07:24 -04:00
nmi_backtrace.c
ARM: 8439/1: Fix backtrace generation when IPI is masked
2015-10-03 16:40:51 +01:00
notifier-error-inject.c
…
notifier-error-inject.h
…
of-reconfig-notifier-error-inject.c
…
oid_registry.c
509: fix printing uninitialized stack memory when OID is empty
2018-02-25 11:03:40 +01:00
once.c
once: make helper generic for calling functions once
2015-10-08 05:26:36 -07:00
parser.c
…
pci_iomap.c
Merge tag 'libnvdimm-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2015-09-08 14:35:59 -07:00
percpu_counter.c
percpu_counter: batch size aware __percpu_counter_compare()
2015-05-29 07:39:34 +10:00
percpu_ida.c
mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM
2015-11-06 17:50:42 -08:00
percpu_test.c
…
percpu-refcount.c
…
plist.c
lib/plist.c: remove redundant include
2015-02-12 18:54:16 -08:00
pm-notifier-error-inject.c
…
proportions.c
treewide: Remove old email address
2015-11-23 09:44:58 +01:00
radix-tree.c
radix-tree: fix race in gang lookup
2016-02-25 12:01:23 -08:00
random32.c
random32: make prandom_u32() output unpredictable
2020-11-18 18:25:02 +01:00
ratelimit.c
…
rational.c
…
rbtree_test.c
lib/rbtree-test: lower default params
2018-12-21 14:09:49 +01:00
rbtree.c
rbtree: Make lockless searches non-fatal
2015-05-28 11:32:04 +09:30
reciprocal_div.c
…
rhashtable.c
rhashtable: add schedule points
2019-02-08 11:25:31 +01:00
scatterlist.c
lib/scatterlist.c: adjust indentation in __sg_alloc_table
2020-02-28 15:39:09 +01:00
seq_buf.c
seq_buf: Make seq_buf_puts() null-terminate the buffer
2019-02-20 10:13:12 +01:00
sg_split.c
lib: scatterlist: add sg splitting function
2015-08-24 14:28:01 -06:00
sha1.c
lib: EXPORT_SYMBOL sha_init
2015-03-23 22:12:08 -04:00
show_mem.c
lib/show_mem.c: correct reserved memory calculation
2015-09-08 15:35:28 -07:00
siphash.c
siphash: implement HalfSipHash1-3 for hash tables
2019-09-06 10:18:13 +02:00
smp_processor_id.c
…
sort.c
lib/sort: Add 64 bit swap function
2015-06-25 17:00:40 -07:00
stmp_device.c
lib/stmp_device.c: replace module.h include
2015-02-12 18:54:16 -08:00
string_helpers.c
string_helpers: fix precision loss for some inputs
2016-02-25 12:01:21 -08:00
string.c
lib/string: Add strscpy_pad() function
2021-02-23 13:58:12 +01:00
strncpy_from_user.c
mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions
2019-06-11 12:23:56 +02:00
strnlen_user.c
mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions
2019-06-11 12:23:56 +02:00
swiotlb.c
swiotlb: fix "x86: Don't panic if can not alloc buffer for swiotlb"
2020-11-18 18:25:01 +01:00
syscall.c
…
test_bpf.c
bpf: fix selftests/bpf test_kmod.sh failure when CONFIG_BPF_JIT_ALWAYS_ON=y
2018-05-30 07:48:56 +02:00
test_firmware.c
test: firmware_class: report errors properly on failure
2017-11-15 17:13:13 +01:00
test_kasan.c
lib/test_kasan.c: fix memory leak in kmalloc_oob_krealloc_more()
2020-02-14 16:29:55 -05:00
test_module.c
…
test_printf.c
test_printf: test printf family at runtime
2015-11-06 17:50:42 -08:00
test_rhashtable.c
rhashtable-test: extend to test concurrency
2015-08-17 14:33:47 -07:00
test_siphash.c
siphash: implement HalfSipHash1-3 for hash tables
2019-09-06 10:18:13 +02:00
test_static_key_base.c
locking/static_keys: Provide a selftest
2015-08-03 11:51:12 +02:00
test_static_keys.c
locking/static_keys: Make verify_keys() static
2015-08-05 09:53:40 +02:00
test_user_copy.c
usercopy: Adjust tests to deal with SMAP/PAN
2017-06-14 13:16:27 +02:00
test-hexdump.c
test_hexdump: use memcpy instead of strncpy
2019-02-20 10:13:14 +01:00
test-kstrtox.c
kstrto*: accept "-0" for signed conversion
2015-09-10 13:29:01 -07:00
test-string_helpers.c
lib/test-string_helpers.c: fix and improve string_get_size() tests
2016-05-11 11:21:26 +02:00
textsearch.c
…
timerqueue.c
timerqueue: Let timerqueue_add/del return information
2015-04-22 17:06:49 +02:00
ts_bm.c
…
ts_fsm.c
…
ts_kmp.c
…
ucs2_string.c
lib/ucs2_string: Correct ucs2 -> utf8 conversion
2016-03-03 15:07:09 -08:00
usercopy.c
…
uuid.c
…
vsprintf.c
lib/vsprintf: Remove atomic-unsafe support for %pCr
2018-07-03 11:21:27 +02:00