atmos
/
fortify-headers
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add getcwd() checks

This commit is contained in:
sin 2015-02-05 14:07:14 +00:00
parent aa19847d12
commit 00b376bb07
1 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
include/unistd.h
View File

@ -23,6 +23,21 @@ __fortify_confstr(int name, char *buf, size_t len)
return confstr(name, buf, len);
}
__errordecl(__getcwd_error, "getcwd: buffer overflow detected");
static inline __attribute__ ((always_inline))
char *
__fortify_getcwd(char *buf, size_t len)
{
size_t bos = __builtin_object_size(buf, 0);
if (__builtin_constant_p(len) && len > bos)
__getcwd_error();
if (len > bos)
__builtin_trap();
return getcwd(buf, len);
}
__errordecl(__pread_error, "pread: buffer overflow detected");
static inline __attribute__ ((always_inline))
ssize_t
@ -55,6 +70,8 @@ __fortify_read(int fd, void *buf, size_t n)
#undef confstr
#define confstr(name, buf, len) __fortify_confstr(name, buf, len)
#undef getcwd
#define getcwd(buf, len) __fortify_getcwd(buf, len)
#undef pread
#define pread(fd, buf, n, offset) __fortify_pread(fd, buf, n, offset)
#undef read