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authorMarco Elver <elver@google.com>2019-07-12 06:54:07 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-12 21:05:42 +0300
commitb5f6e0fc7d60e0234dac82498e90dfe9027bad1f (patch)
tree41492a12b523dbf5af7211b71cdc2569204945f8 /mm/kasan/kasan.h
parent7d8ad890dad00f6cd64bfb44d9be4fceb10cf819 (diff)
downloadlinux-b5f6e0fc7d60e0234dac82498e90dfe9027bad1f.tar.xz
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/kasan.h')
-rw-r--r--mm/kasan/kasan.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 1979db4763e2..014f19e76247 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -128,7 +128,15 @@ static inline bool addr_has_shadow(const void *addr)
void kasan_poison_shadow(const void *address, size_t size, u8 value);
-void check_memory_region(unsigned long addr, size_t size, bool write,
+/**
+ * check_memory_region - Check memory region, and report if invalid access.
+ * @addr: the accessed address
+ * @size: the accessed size
+ * @write: true if access is a write access
+ * @ret_ip: return address
+ * @return: true if access was valid, false if invalid
+ */
+bool check_memory_region(unsigned long addr, size_t size, bool write,
unsigned long ret_ip);
void *find_first_bad_addr(void *addr, size_t size);