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| author | Marco Elver <elver@google.com> | 2024-10-21 14:00:10 +0200 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2024-10-23 16:04:30 +0100 |
| commit | 894b00a3350c560990638bdf89bdf1f3d5491950 (patch) | |
| tree | 67540d8ad3639ab5efb69432706edfe7026be5d8 /include | |
| parent | 7aed6a2c51ffc97a126e0ea0c270fab7af97ae18 (diff) | |
| download | lwn-894b00a3350c560990638bdf89bdf1f3d5491950.tar.gz lwn-894b00a3350c560990638bdf89bdf1f3d5491950.zip | |
kasan: Fix Software Tag-Based KASAN with GCC
Per [1], -fsanitize=kernel-hwaddress with GCC currently does not disable
instrumentation in functions with __attribute__((no_sanitize_address)).
However, __attribute__((no_sanitize("hwaddress"))) does correctly
disable instrumentation. Use it instead.
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117196 [1]
Link: https://lore.kernel.org/r/000000000000f362e80620e27859@google.com
Link: https://lore.kernel.org/r/ZvFGwKfoC4yVjN_X@J2N7QTR9R3
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218854
Reported-by: syzbot+908886656a02769af987@syzkaller.appspotmail.com
Tested-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrew Pinski <pinskia@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Fixes: 7b861a53e46b ("kasan: Bump required compiler version")
Link: https://lore.kernel.org/r/20241021120013.3209481-1-elver@google.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/compiler-gcc.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index f805adaa316e..cd6f9aae311f 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -80,7 +80,11 @@ #define __noscs __attribute__((__no_sanitize__("shadow-call-stack"))) #endif +#ifdef __SANITIZE_HWADDRESS__ +#define __no_sanitize_address __attribute__((__no_sanitize__("hwaddress"))) +#else #define __no_sanitize_address __attribute__((__no_sanitize_address__)) +#endif #if defined(__SANITIZE_THREAD__) #define __no_sanitize_thread __attribute__((__no_sanitize_thread__)) |