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Add sprintf() check

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sin 2015-03-01 11:09:13 +00:00
parent e71d1fd257
commit 0826c593be
1 changed files with 15 additions and 1 deletions
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16
include/stdio.h
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@ -41,7 +41,21 @@ __fortify_vsnprintf(char *s, size_t n, const char *fmt, __builtin_va_list ap)
size_t bos = __builtin_object_size(s, 0); \
if (_n > bos) \
__builtin_trap(); \
snprintf(s, _n, fmt, ## __VA_ARGS__); \
(snprintf)(s, _n, fmt, ## __VA_ARGS__); \
})
#undef sprintf
#define sprintf(s, fmt, ...) ({ \
size_t bos = __builtin_object_size(s, 0); \
int r; \
if (bos != -1) { \
r = (snprintf)(s, bos, fmt, ## __VA_ARGS__); \
if (r == -1 || r >= bos) \
__builtin_trap(); \
} else { \
r = (sprintf)(s, fmt, ## __VA_ARGS__); \
} \
r; \
})
#endif