mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-20 01:08:53 +07:00
bcf6f55a0d
Building little-endian allmodconfig kernels on arm64 started failing with the generated atomic.h implementation, since we now try to call kasan helpers from the EFI stub: aarch64-linux-gnu-ld: drivers/firmware/efi/libstub/arm-stub.stub.o: in function `atomic_set': include/generated/atomic-instrumented.h:44: undefined reference to `__efistub_kasan_check_write' I suspect that we get similar problems in other files that explicitly disable KASAN for some reason but call atomic_t based helper functions. We can fix this by checking the predefined __SANITIZE_ADDRESS__ macro that the compiler sets instead of checking CONFIG_KASAN, but this in turn requires a small hack in mm/kasan/common.c so we do see the extern declaration there instead of the inline function. Link: http://lkml.kernel.org/r/20181211133453.2835077-1-arnd@arndb.de Fixes: b1864b828644 ("locking/atomics: build atomic headers as required") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reported-by: Anders Roxell <anders.roxell@linaro.org> Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au>, Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 lines
484 B
C
16 lines
484 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_KASAN_CHECKS_H
|
|
#define _LINUX_KASAN_CHECKS_H
|
|
|
|
#if defined(__SANITIZE_ADDRESS__) || defined(__KASAN_INTERNAL)
|
|
void kasan_check_read(const volatile void *p, unsigned int size);
|
|
void kasan_check_write(const volatile void *p, unsigned int size);
|
|
#else
|
|
static inline void kasan_check_read(const volatile void *p, unsigned int size)
|
|
{ }
|
|
static inline void kasan_check_write(const volatile void *p, unsigned int size)
|
|
{ }
|
|
#endif
|
|
|
|
#endif
|