6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Marco Elver <elver@xxxxxxxxxx>
[ Upstream commit 894b00a3350c560990638bdf89bdf1f3d5491950 ]
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@xxxxxxxxxx
Link: https://lore.kernel.org/r/ZvFGwKfoC4yVjN_X@J2N7QTR9R3
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218854
Reported-by: syzbot+908886656a02769af987@xxxxxxxxxxxxxxxxxxxxxxxxx
Tested-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Andrew Pinski <pinskia@xxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Marco Elver <elver@xxxxxxxxxx>
Reviewed-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Fixes: 7b861a53e46b ("kasan: Bump required compiler version")
Link: https://lore.kernel.org/r/20241021120013.3209481-1-elver@xxxxxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
include/linux/compiler-gcc.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 8c9a095c17571..9e6961078c2aa 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -102,7 +102,11 @@
#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__))
--
2.43.0
