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| author | Andrey Ryabinin <ryabinin.a.a@gmail.com> | 2015-09-22 14:59:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-22 15:09:53 -0700 |
| commit | 769a8089c1fd2fe94c13e66fe6e03d7820953ee3 (patch) | |
| tree | 3f32fd1441aa4c6cca969efdc9f74aafca60ce41 /drivers/firmware | |
| parent | 3aaa76e125c1dd58c9b599baa8c6021896874c12 (diff) | |
| download | linux-769a8089c1fd2fe94c13e66fe6e03d7820953ee3.tar.gz linux-769a8089c1fd2fe94c13e66fe6e03d7820953ee3.tar.bz2 linux-769a8089c1fd2fe94c13e66fe6e03d7820953ee3.zip | |
x86, efi, kasan: #undef memset/memcpy/memmove per arch
In not-instrumented code KASAN replaces instrumented memset/memcpy/memmove
with not-instrumented analogues __memset/__memcpy/__memove.
However, on x86 the EFI stub is not linked with the kernel. It uses
not-instrumented mem*() functions from arch/x86/boot/compressed/string.c
So we don't replace them with __mem*() variants in EFI stub.
On ARM64 the EFI stub is linked with the kernel, so we should replace
mem*() functions with __mem*(), because the EFI stub runs before KASAN
sets up early shadow.
So let's move these #undef mem* into arch's asm/efi.h which is also
included by the EFI stub.
Also, this will fix the warning in 32-bit build reported by kbuild test
robot:
efi-stub-helper.c:599:2: warning: implicit declaration of function 'memcpy'
[akpm@linux-foundation.org: use 80 cols in comment]
Signed-off-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Reported-by: Fengguang Wu <fengguang.wu@gmail.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/libstub/efistub.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h index e334a01cf92f..6b6548fda089 100644 --- a/drivers/firmware/efi/libstub/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h @@ -5,10 +5,6 @@ /* error code which can't be mistaken for valid address */ #define EFI_ERROR (~0UL) -#undef memcpy -#undef memset -#undef memmove - void efi_char16_printk(efi_system_table_t *, efi_char16_t *); efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg, void *__image, |