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Add read checks for bcopy()

This commit is contained in:
sin 2015-04-08 15:25:47 +01:00
parent 2bd3091b36
commit c7e82d4863
1 changed files with 5 additions and 4 deletions
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9
include/strings.h
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@ -16,13 +16,14 @@ extern "C" {
#undef bzero
__typeof__(bcopy) __bcopy_orig __asm__(__USER_LABEL_PREFIX__ "bcopy");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
void bcopy(const void *src, void *dest, size_t n)
void bcopy(const void *src, void *dst, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
size_t bos_dst = __builtin_object_size(dst, 0);
size_t bos_src = __builtin_object_size(src, 0);
if (n > bos)
if (n > bos_dst || n > bos_src)
__builtin_trap();
return __bcopy_orig(src, dest, n);
return __bcopy_orig(src, dst, n);
}
__typeof__(bzero) __bzero_orig __asm__(__USER_LABEL_PREFIX__ "bzero");