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| author | Marco Elver | 2019-07-12 05:54:07 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2019-07-12 20:05:42 +0200 |
| commit | b5f6e0fc7d60e0234dac82498e90dfe9027bad1f (patch) | |
| tree | 41492a12b523dbf5af7211b71cdc2569204945f8 /mm/kasan/generic.c | |
| parent | mm/kasan: introduce __kasan_check_{read,write} (diff) | |
| download | kernel-qcow2-linux-b5f6e0fc7d60e0234dac82498e90dfe9027bad1f.tar.gz kernel-qcow2-linux-b5f6e0fc7d60e0234dac82498e90dfe9027bad1f.tar.xz kernel-qcow2-linux-b5f6e0fc7d60e0234dac82498e90dfe9027bad1f.zip | |
mm/kasan: change kasan_check_{read,write} to return boolean
This changes {,__}kasan_check_{read,write} functions to return a boolean
denoting if the access was valid or not.
[sfr@canb.auug.org.au: include types.h for "bool"]
Link: http://lkml.kernel.org/r/20190705184949.13cdd021@canb.auug.org.au
Link: http://lkml.kernel.org/r/20190626142014.141844-3-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kasan/generic.c')
| -rw-r--r-- | mm/kasan/generic.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c index 504c79363a34..616f9dd82d12 100644 --- a/mm/kasan/generic.c +++ b/mm/kasan/generic.c @@ -166,29 +166,30 @@ static __always_inline bool memory_is_poisoned(unsigned long addr, size_t size) return memory_is_poisoned_n(addr, size); } -static __always_inline void check_memory_region_inline(unsigned long addr, +static __always_inline bool check_memory_region_inline(unsigned long addr, size_t size, bool write, unsigned long ret_ip) { if (unlikely(size == 0)) - return; + return true; if (unlikely((void *)addr < kasan_shadow_to_mem((void *)KASAN_SHADOW_START))) { kasan_report(addr, size, write, ret_ip); - return; + return false; } if (likely(!memory_is_poisoned(addr, size))) - return; + return true; kasan_report(addr, size, write, ret_ip); + return false; } -void check_memory_region(unsigned long addr, size_t size, bool write, +bool check_memory_region(unsigned long addr, size_t size, bool write, unsigned long ret_ip) { - check_memory_region_inline(addr, size, write, ret_ip); + return check_memory_region_inline(addr, size, write, ret_ip); } void kasan_cache_shrink(struct kmem_cache *cache) |