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Peter Collingbourne f649dc0e0d kasan: fix unit tests with CONFIG_UBSAN_LOCAL_BOUNDS enabled 
These tests deliberately access these arrays out of bounds, which will
cause the dynamic local bounds checks inserted by
CONFIG_UBSAN_LOCAL_BOUNDS to fail and panic the kernel.  To avoid this
problem, access the arrays via volatile pointers, which will prevent the
compiler from being able to determine the array bounds.

These accesses use volatile pointers to char (char *volatile) rather than
the more conventional pointers to volatile char (volatile char *) because
we want to prevent the compiler from making inferences about the pointer
itself (i.e.  its array bounds), not the data that it refers to.

Link: https://lkml.kernel.org/r/20210507025915.1464056-1-pcc@google.com
Link: https://linux-review.googlesource.com/id/I90b1713fbfa1bf68ff895aef099ea77b98a7c3b9
Signed-off-by: Peter Collingbourne <pcc@google.com>
Tested-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: George Popescu <georgepope@android.com>
Cc: Elena Petrova <lenaptr@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-14 19:41:32 -07:00
..
842 kbuild: trace functions in subdirectories of lib/ 2020-08-10 01:32:59 +09:00
crypto crypto: doc - fix kernel-doc notation in chacha.c and af_alg.c 2021-04-22 17:31:29 +10:00
dim Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 14:15:17 -06:00
fonts Fonts: font_ter16x32: Update font with new upstream Terminus release 2021-01-07 21:06:25 +01:00
kunit kunit: support failure from dynamic analysis tools 2021-04-02 14:19:58 -06:00
livepatch Kbuild updates for v5.9 2020-08-09 14:10:26 -07:00
lz4 lib/lz4: explicitly support in-place decompression 2020-12-15 22:46:16 -08:00
lzo lib/lzo/lzo1x_compress.c: make lzogeneric1x_1_compress() static 2020-12-15 22:46:19 -08:00
math - removed get_fs/set_fs 2021-04-29 11:28:08 -07:00
mpi lib/mpi: Remove unused scalar_copied 2020-10-30 17:34:45 +11:00
pldmfw Add pldmfw library for PLDM firmware update 2020-07-28 17:07:06 -07:00
raid6 lib/raid6: Let $(UNROLL) rules work with macOS userland 2021-01-04 10:38:11 +09:00
reed_solomon kbuild: trace functions in subdirectories of lib/ 2020-08-10 01:32:59 +09:00
vdso lib/vdso: Add vdso_data pointer as input to __arch_get_timens_vdso_data() 2021-04-14 23:04:44 +10:00
xz Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 14:15:17 -06:00
zlib_deflate kbuild: trace functions in subdirectories of lib/ 2020-08-10 01:32:59 +09:00
zlib_dfltcc zlib: move EXPORT_SYMBOL() and MODULE_LICENSE() out of dfltcc_syms.c 2020-12-29 15:36:49 -08:00
zlib_inflate lib: Fix fall-through warnings for Clang 2020-11-19 07:23:47 -06:00
zstd lib: Fix fall-through warnings for Clang 2020-11-19 07:23:47 -06:00
.gitignore .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
argv_split.c
ashldi3.c
ashrdi3.c
asn1_decoder.c Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 14:15:17 -06:00
asn1_encoder.c lib: Add ASN.1 encoder 2021-04-14 16:30:30 +03:00
assoc_array.c Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 14:15:17 -06:00
atomic64_test.c
atomic64.c
audit.c
bcd.c
bch.c lib/bch.c: fix a typo in the file bch.c 2021-05-06 19:24:12 -07:00
bitfield_kunit.c lib: kunit: Fix compilation test when using TEST_BIT_FIELD_COMPILE 2020-10-16 13:25:14 -06:00
bitmap.c gpio updates for v5.13 2021-05-05 12:39:29 -07:00
bitrev.c
bootconfig.c Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 14:15:17 -06:00
bsearch.c lib/bsearch: Provide __always_inline variant 2020-06-11 15:14:53 +02:00
btree.c
bucket_locks.c
bug.c bug: Assign values once in bug_get_file_line() 2021-04-01 09:54:37 +01:00
build_OID_registry
buildid.c bpf: Add size arg to build_id_parse function 2021-01-14 19:29:58 -08:00
bust_spinlocks.c
check_signature.c
checksum.c unify generic instances of csum_partial_copy_nocheck() 2020-08-20 15:45:14 -04:00
clz_ctz.c
clz_tab.c
cmdline_kunit.c lib/cmdline: Allow get_options() to take 0 to validate the input 2021-02-15 11:43:31 +01:00
cmdline.c lib/cmdline: Export next_arg() for being used in modules 2021-05-05 16:07:40 +02:00
cmpdi2.c
compat_audit.c
cpu_rmap.c
cpumask.c Revert "lib: Restrict cpumask_local_spread to houskeeping CPUs" 2021-02-05 23:28:29 +01:00
crc4.c
crc7.c lib/crc7: fix a kernel-doc markup 2021-01-21 14:06:00 -07:00
crc8.c lib: crc8: pointer to data block should be const 2021-05-06 19:24:12 -07:00
crc16.c
crc32.c lib/crc32.c: fix trivial typo in preprocessor condition 2020-10-16 11:11:20 -07:00
crc32defs.h
crc32test.c lib/crc32test: remove extra local_irq_disable/enable 2020-11-02 12:14:19 -08:00
crc64.c lib/: replace HTTP links with HTTPS ones 2020-08-12 10:58:00 -07:00
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c crc-t10dif: clean up some more things 2020-06-18 17:26:43 +10:00
ctype.c
debug_info.c
debug_locks.c lockdep: Prepare for noinstr sections 2020-05-19 15:47:21 +02:00
debugobjects.c debugobjects: Free per CPU pool after CPU unplug 2020-10-01 16:13:54 +02:00
dec_and_lock.c
decompress_bunzip2.c lib: decompress_bunzip2: delete duplicated words 2020-10-16 11:11:19 -07:00
decompress_inflate.c
decompress_unlz4.c
decompress_unlzma.c lib: fix inconsistent indenting in process_bit1() 2021-05-06 19:24:12 -07:00
decompress_unlzo.c
decompress_unxz.c
decompress_unzstd.c lib: decompress_unzstd: Limit output size 2020-09-03 10:13:09 +02:00
decompress.c lib: Add zstd support to decompress 2020-07-31 11:49:08 +02:00
devmem_is_allowed.c lib: Add a generic version of devmem_is_allowed() 2020-12-11 12:28:08 -08:00
devres.c asm-generic/io.h: Add a non-posted variant of ioremap() 2021-04-08 20:18:38 +09:00
digsig.c crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
dump_stack.c stop_machine: Add function and caller debug info 2020-11-10 18:38:57 +01:00
dynamic_debug.c dyndbg: fix parsing file query without a line-range suffix 2021-04-30 07:43:20 +02:00
dynamic_queue_limits.c lib: dynamic_queue_limits: delete duplicated words + fix typo 2020-10-16 11:11:20 -07:00
earlycpio.c lib: remove "expecting prototype" kernel-doc warnings 2021-04-16 16:10:37 -07:00
errname.c kernel.h: split out mathematical helpers 2020-12-15 22:46:15 -08:00
error-inject.c fault-injection: handle EI_ETYPE_TRUE 2020-12-15 22:46:19 -08:00
errseq.c kernel.h: split out mathematical helpers 2020-12-15 22:46:15 -08:00
extable.c sparc32: switch to generic extables 2021-01-03 20:05:18 -05:00
fault-inject-usercopy.c lib, include/linux: add usercopy failure capability 2020-10-16 11:11:22 -07:00
fault-inject.c
fdt_addresses.c
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
find_bit.c lib: add fast path for find_first_*_bit() and find_last_bit() 2021-05-06 19:24:12 -07:00
flex_proportions.c lib/flex_proportions.c: cleanup __fprop_inc_percpu_max 2020-06-04 19:06:25 -07:00
gen_crc32table.c
gen_crc64table.c
genalloc.c lib/genalloc: add parameter description to fix doc compile warning 2021-05-06 19:24:12 -07:00
generic-radix-tree.c
glob.c Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 14:15:17 -06:00
globtest.c
hexdump.c kernel.h: split out min()/max() et al. helpers 2020-10-16 11:11:19 -07:00
hweight.c
idr.c XArray updates for 5.9 2020-10-20 14:39:37 -07:00
inflate.c
interval_tree_test.c
interval_tree.c
iomap_copy.c
iomap.c iomap: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
iommu-helper.c
iov_iter.c iov_iter: lift memzero_page() to highmem.h 2021-05-05 11:27:27 -07:00
irq_poll.c
irq_regs.c
is_single_threaded.c
kasprintf.c
Kconfig lib: Add ASN.1 encoder 2021-04-14 16:30:30 +03:00
Kconfig.debug mm/memtest: add ARCH_USE_MEMTEST 2021-04-30 11:20:36 -07:00
Kconfig.kasan kasan: remove redundant config option 2021-04-16 16:10:36 -07:00
Kconfig.kcsan kcsan: Make test follow KUnit style recommendations 2021-03-08 14:27:43 -08:00
Kconfig.kfence kfence: await for allocation using wait_event 2021-05-05 11:27:27 -07:00
Kconfig.kgdb kgdb: Honour the kprobe blocklist when setting breakpoints 2020-09-28 12:14:08 +01:00
Kconfig.ubsan ubsan: remove overflow checks 2021-02-26 09:41:05 -08:00
kfifo.c
klist.c
kobject_uevent.c kobject_uevent: remove warning in init_uevent_argv() 2021-04-10 11:09:41 +02:00
kobject.c kobject: Drop unneeded conditional in __kobject_del() 2020-09-07 11:24:17 +02:00
kstrtox.c lib: Fix fall-through warnings for Clang 2020-11-19 07:23:47 -06:00
kstrtox.h
libcrc32c.c lib: libcrc32c: delete duplicated words 2020-10-16 11:11:19 -07:00
linear_ranges.c lib/linear_ranges: fix repeated words & one typo 2020-12-28 12:24:47 +00:00
list_debug.c
list_sort.c lib/list_sort.c: fix typo in function description 2021-05-06 19:24:12 -07:00
list-test.c
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/selftests: Add local_lock inversion tests 2021-01-14 11:20:18 +01:00
lockref.c
logic_pio.c PCI: Fix pci_register_io_range() memory leak 2021-02-17 17:31:06 -06:00
lru_cache.c lib: remove "expecting prototype" kernel-doc warnings 2021-04-16 16:10:37 -07:00
lshrdi3.c
Makefile lib: Add ASN.1 encoder 2021-04-14 16:30:30 +03:00
memcat_p.c
memory-notifier-error-inject.c
memregion.c lib/memregion.c: include memregion.h 2020-09-26 10:33:57 -07:00
memweight.c
muldi3.c
net_utils.c
netdev-notifier-error-inject.c
nlattr.c net: fix nla_strcmp to handle more then one trailing null character 2021-05-05 12:48:46 -07:00
nmi_backtrace.c lib: Add backtrace_idle parameter to force backtrace of idle CPUs 2020-08-24 14:24:25 -07:00
nodemask.c
notifier-error-inject.c
notifier-error-inject.h
objagg.c
of-reconfig-notifier-error-inject.c
oid_registry.c x509: Detect sm2 keys by their parameters OID 2021-03-26 19:41:58 +11:00
once.c
packing.c lib: packing: add documentation for pbuflen argument 2020-06-28 20:45:27 -07:00
parman.c lib: remove "expecting prototype" kernel-doc warnings 2021-04-16 16:10:37 -07:00
parser.c lib: parser: clean up kernel-doc 2021-05-06 19:24:12 -07:00
pci_iomap.c
percpu_counter.c lib/percpu_counter: tame kernel-doc compile warning 2021-05-06 19:24:12 -07:00
percpu_test.c
percpu-refcount.c percpu_ref: Dump mem_dump_obj() info upon reference-count underflow 2021-01-22 15:24:23 -08:00
plist.c
pm-notifier-error-inject.c
radix-tree.c lib: remove "expecting prototype" kernel-doc warnings 2021-04-16 16:10:37 -07:00
random32.c random32: add a selftest for the prandom32 code 2020-10-24 20:21:57 +02:00
ratelimit.c
rbtree_test.c
rbtree.c lib/: replace HTTP links with HTTPS ones 2020-08-12 10:58:00 -07:00
refcount.c
rhashtable.c rhashtable: Restore RCU marking on rhash_lock_head 2020-07-28 17:09:49 -07:00
sbitmap.c scsi: sbitmap: Add sbitmap_calculate_shift() helper 2021-03-04 17:36:59 -05:00
scatterlist.c lib/scatterlist: use consistent sg_copy_buffer() return type 2020-10-29 08:55:45 -06:00
seq_buf.c seq_buf: Export seq_buf_printf 2020-06-15 18:22:43 -07:00
sg_pool.c
sg_split.c
sha1.c crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
show_mem.c
siphash.c Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 14:15:17 -06:00
smp_processor_id.c sched: Make migrate_disable/enable() independent of RT 2020-11-24 11:25:44 +01:00
sort.c
stackdepot.c lib: stackdepot: turn depot_lock spinlock to raw_spinlock 2021-05-06 19:24:12 -07:00
stmp_device.c
string_helpers.c lib: string_helpers: provide kfree_strarray() 2020-09-30 10:50:30 +02:00
string.c lib/string: remove unnecessary #undefs 2020-12-15 22:46:16 -08:00
strncpy_from_user.c lib/strncpy_from_user.c: Mask out bytes after NUL terminator. 2020-11-19 11:56:16 -08:00
strnlen_user.c uaccess: Selectively open read or write user access 2020-05-01 12:35:21 +10:00
syscall.c lib/syscall: fix syscall registers retrieval on 32-bit platforms 2020-12-03 09:52:44 -08:00
test_bitmap.c lib: test_bitmap: add tests for "N" alias 2021-03-08 14:16:58 -08:00
test_bitops.c lib/test_bitops: do the full test during module init 2020-08-12 10:57:59 -07:00
test_bits.c lib/test_bits.c: add tests of GENMASK 2020-08-12 10:58:00 -07:00
test_blackhole_dev.c
test_bpf.c test_bpf: Remove EXPECTED_FAIL flag from bpf_fill_maxinsns11 2021-01-20 14:13:48 -08:00
test_debug_virtual.c
test_firmware.c lib: cleanup kstrto*() usage 2020-12-15 22:46:16 -08:00
test_fpu.c selftests/fpu: Fix debugfs_simple_attr.cocci warning 2021-01-18 11:03:26 +01:00
test_free_pages.c lib/test_free_pages.c: add basic progress indicators 2020-12-15 22:46:16 -08:00
test_hash.c
test_hexdump.c
test_hmm_uapi.h mm/hmm: add tests for hmm_pfn_to_map_order() 2020-07-10 16:24:28 -03:00
test_hmm.c lib/test_hmm.c: fix an error code in dmirror_allocate_chunk() 2020-10-16 11:11:20 -07:00
test_ida.c
test_kasan_module.c lib/test_kasan_module.c: suppress unused var warning 2021-04-09 14:54:23 -07:00
test_kasan.c kasan: fix unit tests with CONFIG_UBSAN_LOCAL_BOUNDS enabled 2021-05-14 19:41:32 -07:00
test_kmod.c lib: cleanup kstrto*() usage 2020-12-15 22:46:16 -08:00
test_linear_ranges.c lib/test_linear_ranges: add a test for the 'linear_ranges' 2020-05-08 18:18:12 +01:00
test_list_sort.c treewide: Change list_sort to use const pointers 2021-04-08 16:04:22 -07:00
test_lockup.c lib/test_lockup.c: minimum fix to get it compiled on PREEMPT_RT 2020-12-15 22:46:16 -08:00
test_memcat_p.c
test_meminit.c
test_min_heap.c
test_module.c
test_objagg.c test_objagg: Fix potential memory leak in error handling 2020-06-15 13:32:11 -07:00
test_overflow.c
test_parman.c
test_printf.c drm for 5.13-rc1 2021-04-28 10:01:40 -07:00
test_rhashtable.c rhashtable: avoid -Wrestrict warning on overlapping sprintf output 2021-03-24 15:16:09 -07:00
test_siphash.c
test_sort.c
test_stackinit.c
test_static_key_base.c
test_static_keys.c
test_string.c
test_strscpy.c
test_sysctl.c lib: test_sysctl: delete duplicated words 2020-10-16 11:11:20 -07:00
test_ubsan.c ubsan: remove overflow checks 2021-02-26 09:41:05 -08:00
test_user_copy.c
test_uuid.c
test_vmalloc.c lib/test_vmalloc.c: add a new 'nr_threads' parameter 2021-04-30 11:20:40 -07:00
test_xarray.c XArray: Fix splitting to non-zero orders 2021-03-30 13:42:33 -04:00
test-kstrtox.c
test-string_helpers.c lib/test-string_helpers.c: Add string_upper() and string_lower() tests 2020-07-15 12:45:06 +03:00
textsearch.c
timerqueue.c rbtree, timerqueue: Use rb_add_cached() 2021-02-17 14:08:01 +01:00
ts_bm.c lib/: replace HTTP links with HTTPS ones 2020-08-12 10:58:00 -07:00
ts_fsm.c Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 14:15:17 -06:00
ts_kmp.c
ubsan.c ubsan: remove overflow checks 2021-02-26 09:41:05 -08:00
ubsan.h ubsan: implement __ubsan_handle_alignment_assumption 2021-02-05 11:03:47 -08:00
ucmpdi2.c
ucs2_string.c
usercopy.c lib, uaccess: add failure injection to usercopy functions 2020-10-16 11:11:22 -07:00
uuid.c
vsprintf.c drm for 5.13-rc1 2021-04-28 10:01:40 -07:00
win_minmax.c
xarray.c XArray: Fix splitting to non-zero orders 2021-03-30 13:42:33 -04:00
xxhash.c lib/: replace HTTP links with HTTPS ones 2020-08-12 10:58:00 -07:00