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libc: upgrade sprintf to _FORTIFY_SOURCE=2

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Upgrade sprintf to fortify_source level 2, to catch
additional security bugs.

Change-Id: Ibc957d65e4cb96152de84b3745a04e00fa22659e
This commit is contained in:
Nick Kralevich
2013-04-29 16:29:37 -07:00
parent 382a775378
commit 78d6d9888c
4 changed files with 33 additions and 4 deletions
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2
libc/include/stdio.h
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@@ -494,7 +494,7 @@ __attribute__((__nonnull__ (2)))
int sprintf(char *dest, const char *format, ...)
{
return __builtin___sprintf_chk(dest, 0,
__builtin_object_size(dest, 0), format, __builtin_va_arg_pack());
__bos(dest), format, __builtin_va_arg_pack());
}
extern char *__fgets_real(char *, int, FILE *)

4
libc/include/sys/cdefs.h
View File

@@ -518,9 +518,9 @@
#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0 && !defined(__clang__)
#define __BIONIC_FORTIFY 1
#if _FORTIFY_SOURCE == 2
#define __bos(s) __builtin_object_size((s), 1);
#define __bos(s) __builtin_object_size((s), 1)
#else
#define __bos(s) __builtin_object_size((s), 0);
#define __bos(s) __builtin_object_size((s), 0)
#endif
#define __BIONIC_FORTIFY_INLINE \