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Nick Desaulniers e5d523f1ae ubsan: disable UBSAN_DIV_ZERO for clang 
Building with UBSAN_DIV_ZERO with clang produces numerous fallthrough
warnings from objtool.

In the case of uncheck division, UBSAN_DIV_ZERO may introduce new
control flow to check for division by zero.

Because the result of the division is undefined, LLVM may optimize the
control flow such that after the call to __ubsan_handle_divrem_overflow
doesn't matter.  If panic_on_warn was set,
__ubsan_handle_divrem_overflow would panic.

The problem is is that panic_on_warn is run time configurable.  If it's
disabled, then we cannot guarantee that we will be able to recover
safely.  Disable this config for clang until we can come up with a
solution in LLVM.

Link: https://github.com/ClangBuiltLinux/linux/issues/1657
Link: https://github.com/llvm/llvm-project/issues/56289
Link: https://lore.kernel.org/lkml/CAHk-=wj1qhf7y3VNACEexyp5EbkNpdcu_542k-xZpzmYLOjiCg@mail.gmail.com/
Reported-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-07-14 15:45:26 -07:00
..
842
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crypto
crypto: memneq - move into lib/
2022-06-12 14:51:51 +08:00
dim
dim: initialize all struct fields
2022-05-09 17:20:37 -07:00
fonts
…
kunit
kunit: fix executor OOM error handling logic on non-UML
2022-05-17 10:01:40 -06:00
livepatch
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lz4
lz4: fix LZ4_decompress_safe_partial read out of bound
2022-04-08 14:20:36 -10:00
lzo
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math
…
mpi
lib/mpi: export mpi_rshift
2022-03-03 10:47:52 +12:00
pldmfw
…
raid6
lib/raid6: Include <asm/ppc-opcode.h> for VPERMXOR
2022-03-08 15:20:21 -08:00
reed_solomon
…
test_fortify
fortify: Detect struct member overflows in memset() at compile-time
2022-02-13 16:50:06 -08:00
vdso
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xz
lib/xz, lib/decompress_unxz.c: Fix spelling in comments
2021-10-19 23:44:30 +08:00
zlib_deflate
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zlib_dfltcc
…
zlib_inflate
…
zstd
lib: zstd: Don't add -O3 to cflags
2021-11-18 13:16:22 -08:00
.gitignore
bootconfig: Support embedding a bootconfig file in kernel
2022-04-26 17:58:51 -04:00
argv_split.c
…
ashldi3.c
…
ashrdi3.c
…
asn1_decoder.c
…
asn1_encoder.c
lib: remove redundant assignment to variable ret
2022-01-20 08:52:55 +02:00
assoc_array.c
assoc_array: Fix BUG_ON during garbage collect
2022-06-01 18:29:06 -07:00
atomic64_test.c
…
atomic64.c
locking/atomic: atomic64: Remove unusable atomic ops
2021-12-13 10:56:09 +01:00
audit.c
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
bcd.c
…
bch.c
…
bitfield_kunit.c
…
bitmap.c
bitmap: Fix return values to be unsigned
2022-06-03 06:52:58 -07:00
bitrev.c
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bootconfig-data.S
bootconfig: Support embedding a bootconfig file in kernel
2022-04-26 17:58:51 -04:00
bootconfig.c
bootconfig: Support embedding a bootconfig file in kernel
2022-04-26 17:58:51 -04:00
bsearch.c
…
btree.c
…
bucket_locks.c
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bug.c
bug: Use normal relative pointers in 'struct bug_entry'
2022-05-19 23:46:10 +02:00
build_OID_registry
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buildid.c
…
bust_spinlocks.c
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check_signature.c
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checksum.c
…
clz_ctz.c
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clz_tab.c
…
cmdline_kunit.c
…
cmdline.c
…
cmpdi2.c
…
compat_audit.c
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
cpu_rmap.c
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cpumask.c
memblock: use memblock_free for freeing virtual pointers
2021-11-06 13:30:41 -07:00
crc4.c
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crc7.c
…
crc8.c
…
crc16.c
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crc32.c
lib/crc32: Make crc32_be weak for arch override
2022-01-31 11:21:43 +11:00
crc32defs.h
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crc32test.c
lib/crc32test: correct printed bytes count
2022-01-31 11:21:43 +11:00
crc64-rocksoft.c
crypto: add rocksoft 64b crc guard tag framework
2022-03-07 12:48:35 -07:00
crc64.c
lib: add rocksoft model crc64
2022-03-07 12:48:35 -07:00
crc-ccitt.c
…
crc-itu-t.c
crc-itu-t: fix typo in CRC ITU-T polynomial comment
2022-06-07 10:27:38 +02:00
crc-t10dif.c
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ctype.c
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debug_info.c
…
debug_locks.c
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debugobjects.c
debugobjects: Convert to SPDX license identifier
2022-05-13 12:35:17 +02:00
dec_and_lock.c
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decompress_bunzip2.c
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decompress_inflate.c
…
decompress_unlz4.c
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decompress_unlzma.c
…
decompress_unlzo.c
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decompress_unxz.c
lib/xz, lib/decompress_unxz.c: Fix spelling in comments
2021-10-19 23:44:30 +08:00
decompress_unzstd.c
lib: zstd: Add decompress_sources.h for decompress_unzstd
2021-11-08 16:55:26 -08:00
decompress.c
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devmem_is_allowed.c
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devres.c
…
digsig.c
…
dump_stack.c
printk: rename cpulock functions
2022-04-22 21:30:57 +02:00
dynamic_debug.c
dyndbg: refine verbosity 1-4 summary-detail
2021-10-21 13:01:25 +02:00
dynamic_queue_limits.c
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earlycpio.c
…
errname.c
…
error-inject.c
…
errseq.c
…
extable.c
…
fault-inject-usercopy.c
…
fault-inject.c
mm: fix missing handler for __GFP_NOWARN
2022-05-19 14:08:55 -07:00
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
lib: add find_first_and_bit()
2022-01-15 08:47:31 -08:00
find_bit.c
lib: add find_first_and_bit()
2022-01-15 08:47:31 -08:00
flex_proportions.c
flex_proportions: Allow N events instead of 1
2021-10-18 07:49:39 -04:00
gen_crc32table.c
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gen_crc64table.c
lib: add rocksoft model crc64
2022-03-07 12:48:35 -07:00
genalloc.c
all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriate
2022-01-15 08:47:31 -08:00
generic-radix-tree.c
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glob.c
lib: remove back_str initialization
2022-04-29 14:38:01 -07:00
globtest.c
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hexdump.c
hex2bin: fix access beyond string end
2022-04-27 10:57:33 -07:00
hweight.c
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idr.c
ida: don't use BUG_ON() for debugging
2022-07-10 13:55:49 -07:00
inflate.c
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interval_tree_test.c
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interval_tree.c
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iomap_copy.c
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iomap.c
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iommu-helper.c
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iov_iter.c
iov_iter: fix build issue due to possible type mis-match
2022-06-11 10:30:20 -07:00
irq_poll.c
lib/irq_poll: Prevent softirq pending leak in irq_poll_cpu_dead()
2022-04-13 21:32:21 +02:00
irq_regs.c
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is_single_threaded.c
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kasprintf.c
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Kconfig
crypto: memneq - move into lib/
2022-06-12 14:51:51 +08:00
Kconfig.debug
Merge tag 'cxl-for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
2022-05-27 21:24:19 -07:00
Kconfig.kasan
kasan: clean-up kconfig options descriptions
2022-05-13 07:20:19 -07:00
Kconfig.kcsan
objtool: Make noinstr hacks optional
2022-04-22 12:32:04 +02:00
Kconfig.kfence
kfence: allow use of a deferrable timer
2022-03-22 15:57:11 -07:00
Kconfig.kgdb
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Kconfig.ubsan
ubsan: disable UBSAN_DIV_ZERO for clang
2022-07-14 15:45:26 -07:00
kfifo.c
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klist.c
…
kobject_uevent.c
kobject: remove kset from struct kset_uevent_ops callbacks
2021-12-28 11:26:18 +01:00
kobject.c
kobject: kobj_type: remove default_attrs
2022-04-05 15:39:19 +02:00
kstrtox.c
lib/kstrtox.c: add "false"/"true" support to kstrtobool()
2022-05-13 07:20:13 -07:00
kstrtox.h
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libcrc32c.c
…
linear_ranges.c
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list_debug.c
lib/list_debug.c: print more list debugging context in __list_del_entry_valid()
2022-01-20 08:52:53 +02:00
list_sort.c
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list-test.c
list: test: Test the hlist structure
2022-04-05 13:32:27 -06:00
llist.c
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locking-selftest-hardirq.h
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locking-selftest-mutex.h
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locking-selftest-rlock-hardirq.h
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locking-selftest-rlock-softirq.h
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locking-selftest-rlock.h
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locking-selftest-rsem.h
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locking-selftest-rtmutex.h
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locking-selftest-softirq.h
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locking-selftest-spin-hardirq.h
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locking-selftest-spin-softirq.h
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locking-selftest-spin.h
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locking-selftest-wlock-hardirq.h
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locking-selftest-wlock-softirq.h
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locking-selftest-wlock.h
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locking-selftest-wsem.h
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locking-selftest.c
lockdep/selftests: Adapt ww-tests for PREEMPT_RT
2021-12-04 10:56:24 +01:00
lockref.c
lockref: remove unused 'lockref_get_or_lock()' function
2022-07-03 14:40:28 -07:00
logic_iomem.c
lib/logic_iomem: correct fallback config references
2022-03-11 10:42:56 +01:00
logic_pio.c
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lru_cache.c
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lshrdi3.c
…
Makefile
crypto: memneq - move into lib/
2022-06-12 14:51:51 +08:00
memcat_p.c
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memcpy_kunit.c
string.h: Introduce memset_startat() for wiping trailing members and padding
2021-10-18 12:28:52 -07:00
memneq.c
crypto: memneq - move into lib/
2022-06-12 14:51:51 +08:00
memory-notifier-error-inject.c
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memregion.c
…
memweight.c
…
muldi3.c
…
net_utils.c
…
netdev-notifier-error-inject.c
…
nlattr.c
…
nmi_backtrace.c
printk: rename cpulock functions
2022-04-22 21:30:57 +02:00
nodemask.c
nodemask: Fix return values to be unsigned
2022-06-03 06:52:58 -07:00
notifier-error-inject.c
…
notifier-error-inject.h
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objagg.c
lib: objagg: Use the bitmap API when applicable
2021-12-24 14:54:29 -08:00
of-reconfig-notifier-error-inject.c
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oid_registry.c
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once.c
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overflow_kunit.c
lib: overflow: Convert to Kunit
2022-02-27 09:29:02 -08:00
packing.c
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parman.c
…
parser.c
…
pci_iomap.c
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percpu_counter.c
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percpu_test.c
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percpu-refcount.c
percpu_ref_init(): clean ->percpu_count_ref on failure
2022-05-18 02:20:17 -04:00
plist.c
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pm-notifier-error-inject.c
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polynomial.c
lib: add generic polynomial calculation
2022-05-22 11:32:30 -07:00
radix-tree.c
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random32.c
random32: use real rng for non-deterministic randomness
2022-05-18 15:53:52 +02:00
ratelimit.c
…
rbtree_test.c
…
rbtree.c
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ref_tracker.c
ref_tracker: remove filter_irq_stacks() call
2022-02-06 11:05:28 +00:00
refcount.c
…
rhashtable.c
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sbitmap.c
lib/sbitmap: Fix invalid loop in __sbitmap_queue_get_batch()
2022-06-25 10:58:55 -06:00
scatterlist.c
mm/scatterlist: replace the !preemptible warning in sg_miter_stop()
2021-11-09 10:02:50 -08:00
seq_buf.c
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sg_pool.c
…
sg_split.c
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sha1.c
lib/crypto: sha1: re-roll loops to reduce code size
2022-01-18 13:03:55 +01:00
show_mem.c
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siphash.c
Merge tag 'spdx-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx
2022-06-03 10:34:34 -07:00
slub_kunit.c
mm/slub, kunit: Make slub_kunit unaffected by user specified flags
2022-04-06 10:11:48 +02:00
smp_processor_id.c
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sort.c
lib/sort: Add priv pointer to swap function
2022-03-17 20:17:18 -07:00
stackdepot.c
lib/stackdepot: allow requesting early initialization dynamically
2022-04-06 10:55:50 +02:00
stackinit_kunit.c
lib: stackinit: Convert to KUnit
2022-03-21 08:13:04 -07:00
stmp_device.c
…
string_helpers.c
lib/string_helpers: fix not adding strarray to device's resource list
2022-05-12 20:38:36 -07:00
string.c
lib/string.c: simplify str[c]spn
2022-04-29 14:38:01 -07:00
strncpy_from_user.c
lib/strn*,objtool: Enforce user_access_begin() rules
2022-04-19 21:58:47 +02:00
strnlen_user.c
lib/strn*,objtool: Enforce user_access_begin() rules
2022-04-19 21:58:47 +02:00
syscall.c
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test_bitmap.c
lib/bitmap: add test for bitmap_{from,to}_arr64
2022-06-03 06:52:58 -07:00
test_bitops.c
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test_bits.c
…
test_blackhole_dev.c
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test_bpf.c
bpf, tests: Add load store test case for tail call
2022-04-01 00:27:52 +02:00
test_debug_virtual.c
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test_firmware.c
test_firmware: fix end of loop test in upload_read_show()
2022-05-19 19:28:37 +02:00
test_fprobe.c
fprobe: Add a selftest for fprobe
2022-03-17 20:17:14 -07:00
test_fpu.c
…
test_free_pages.c
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test_hash.c
test_hash.c: refactor into kunit
2022-01-20 08:52:54 +02:00
test_hexdump.c
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test_hmm_uapi.h
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test_hmm.c
mm: remove the extra ZONE_DEVICE struct page refcount
2022-03-03 12:47:33 -05:00
test_ida.c
…
test_kasan_module.c
kasan: test: bypass __alloc_size checks
2021-11-06 13:30:33 -07:00
test_kasan.c
kasan: test: Use NULL macros
2022-04-04 14:29:20 -06:00
test_kmod.c
lib/test: use after free in register_test_dev_kmod()
2022-03-29 15:13:36 -07:00
test_kprobes.c
test_kprobes: Move it from kernel/ to lib/
2021-10-26 17:23:46 -04:00
test_linear_ranges.c
…
test_list_sort.c
…
test_lockup.c
lib/test_lockup: fix kernel pointer check for separate address spaces
2022-02-25 09:36:06 +01:00
test_memcat_p.c
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test_meminit.c
lib/test_meminit: optimize do_kmem_cache_rcu_persistent() test
2022-04-29 14:38:00 -07:00
test_min_heap.c
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test_module.c
…
test_objagg.c
…
test_parman.c
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test_printf.c
vsprintf: Make %pGp print the hex value
2021-10-27 13:40:14 +02:00
test_ref_tracker.c
lib: add tests for reference tracker
2021-12-06 16:04:44 -08:00
test_rhashtable.c
…
test_scanf.c
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test_siphash.c
siphash: add SPDX tags as sole licensing authority
2022-05-19 18:54:22 +02:00
test_sort.c
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test_static_key_base.c
…
test_static_keys.c
…
test_string.c
lib/test_string.c: add strspn and strcspn tests
2022-04-29 14:38:00 -07:00
test_strscpy.c
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test_sysctl.c
selftests/sysctl: add sysctl macro test
2022-05-03 10:15:07 +02:00
test_ubsan.c
ubsan: remove CONFIG_UBSAN_OBJECT_SIZE
2022-01-20 08:52:55 +02:00
test_user_copy.c
…
test_uuid.c
…
test_vmalloc.c
lib/test_vmalloc.c: use swap() to make code cleaner
2021-11-06 13:30:37 -07:00
test_xarray.c
XArray: Fix xas_create_range() when multi-order entry present
2022-03-28 19:25:11 -04:00
test-kstrtox.c
…
test-string_helpers.c
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textsearch.c
…
timerqueue.c
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ts_bm.c
…
ts_fsm.c
…
ts_kmp.c
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ubsan.c
ubsan: no need to unset panic_on_warn in ubsan_epilogue()
2022-03-23 19:00:35 -07:00
ubsan.h
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ucmpdi2.c
…
ucs2_string.c
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usercopy.c
…
uuid.c
…
vsprintf.c
random: remove rng_has_arch_random()
2022-06-10 11:29:48 +02:00
win_minmax.c
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xarray.c
mm/huge_memory: Fix xarray node memory leak
2022-06-09 16:24:25 -04:00
xxhash.c
…