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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-04-19 14:10:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-04-19 14:10:11 -0700 |
| commit | 2d412262ccfd100218412b4b52d92d6a7bb043a4 (patch) | |
| tree | ecfa051db35b568adf54db118c876353555a6464 /lib | |
| parent | 50a1317fd18acc2793edcb1d078909527c273a9e (diff) | |
| parent | f4626c12e4b538f757a73d08f4d86d564175b4f7 (diff) | |
| download | linux-2d412262ccfd100218412b4b52d92d6a7bb043a4.tar.gz | |
Merge tag 'hardening-v6.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening fixes from Kees Cook:
- Correctly disable UBSAN configs in configs/hardening (Nathan
Chancellor)
- Add missing signed integer overflow trap types to arm64 handler
* tag 'hardening-v6.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
ubsan: Add awareness of signed integer overflow traps
configs/hardening: Disable CONFIG_UBSAN_SIGNED_WRAP
configs/hardening: Fix disabling UBSAN configurations
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/ubsan.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/lib/ubsan.c b/lib/ubsan.c index 5fc107f61934c2..a1c983d148f16f 100644 --- a/lib/ubsan.c +++ b/lib/ubsan.c @@ -44,9 +44,10 @@ const char *report_ubsan_failure(struct pt_regs *regs, u32 check_type) case ubsan_shift_out_of_bounds: return "UBSAN: shift out of bounds"; #endif -#ifdef CONFIG_UBSAN_DIV_ZERO +#if defined(CONFIG_UBSAN_DIV_ZERO) || defined(CONFIG_UBSAN_SIGNED_WRAP) /* - * SanitizerKind::IntegerDivideByZero emits + * SanitizerKind::IntegerDivideByZero and + * SanitizerKind::SignedIntegerOverflow emit * SanitizerHandler::DivremOverflow. */ case ubsan_divrem_overflow: @@ -78,6 +79,19 @@ const char *report_ubsan_failure(struct pt_regs *regs, u32 check_type) case ubsan_type_mismatch: return "UBSAN: type mismatch"; #endif +#ifdef CONFIG_UBSAN_SIGNED_WRAP + /* + * SanitizerKind::SignedIntegerOverflow emits + * SanitizerHandler::AddOverflow, SanitizerHandler::SubOverflow, + * or SanitizerHandler::MulOverflow. + */ + case ubsan_add_overflow: + return "UBSAN: integer addition overflow"; + case ubsan_sub_overflow: + return "UBSAN: integer subtraction overflow"; + case ubsan_mul_overflow: + return "UBSAN: integer multiplication overflow"; +#endif default: return "UBSAN: unrecognized failure code"; } |