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| author | Kees Cook <keescook@chromium.org> | 2024-04-15 11:28:35 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2024-04-15 17:42:43 -0700 |
| commit | f4626c12e4b538f757a73d08f4d86d564175b4f7 (patch) | |
| tree | e5c0d2ce5e701a2002f40e7cad95d53711d3cf4b /kernel | |
| parent | 7fcb91d94e897413c0345bb32ea11293f33efbb1 (diff) | |
| download | lwn-f4626c12e4b538f757a73d08f4d86d564175b4f7.tar.gz lwn-f4626c12e4b538f757a73d08f4d86d564175b4f7.zip | |
ubsan: Add awareness of signed integer overflow traps
On arm64, UBSAN traps can be decoded from the trap instruction. Add the
add, sub, and mul overflow trap codes now that CONFIG_UBSAN_SIGNED_WRAP
exists. Seen under clang 19:
Internal error: UBSAN: unrecognized failure code: 00000000f2005515 [#1] PREEMPT SMP
Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://lore.kernel.org/lkml/20240411-fix-ubsan-in-hardening-config-v1-0-e0177c80ffaa@kernel.org
Fixes: 557f8c582a9b ("ubsan: Reintroduce signed overflow sanitizer")
Tested-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20240415182832.work.932-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions