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| author |  Andrey Konovalov <andreyknvl@google.com>
| 2018-12-28 00:30:20 -0800 |
|---|---|---|
| committer |  Linus Torvalds <torvalds@linux-foundation.org>
| 2018-12-28 12:11:43 -0800 |
| commit | e71fe3f921aeb27f0c65ee7ebfdde7f8c7d60b74 (patch) | |
| tree | ee15b1256837ce340d01f07aecb19332f7c92a87 /arch | |
| parent | kasan: add tag related helper functions (diff) | |
| download | linux-e71fe3f921aeb27f0c65ee7ebfdde7f8c7d60b74.tar.gz linux-e71fe3f921aeb27f0c65ee7ebfdde7f8c7d60b74.tar.bz2 linux-e71fe3f921aeb27f0c65ee7ebfdde7f8c7d60b74.zip | |
kasan, arm64: untag address in _virt_addr_is_linear
virt_addr_is_linear (which is used by virt_addr_valid) assumes that the
top byte of the address is 0xff, which isn't always the case with
tag-based KASAN.
This patch resets the tag in this macro.
Link: http://lkml.kernel.org/r/df73a37dd5ed37f4deaf77bc718e9f2e590e69b1.1544099024.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/include/asm/memory.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 25b46f88726c..907946cc767c 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -329,9 +329,10 @@ static inline void *phys_to_virt(phys_addr_t x) #endif #endif -#define _virt_addr_is_linear(kaddr) (((u64)(kaddr)) >= PAGE_OFFSET) -#define virt_addr_valid(kaddr) (_virt_addr_is_linear(kaddr) && \ - _virt_addr_valid(kaddr)) +#define _virt_addr_is_linear(kaddr) \ + (__tag_reset((u64)(kaddr)) >= PAGE_OFFSET) +#define virt_addr_valid(kaddr) \ + (_virt_addr_is_linear(kaddr) && _virt_addr_valid(kaddr)) #include <asm-generic/memory_model.h> |