diff options
Diffstat (limited to 'sysdeps/generic/dl-sysdep.c')
| -rw-r--r-- | sysdeps/generic/dl-sysdep.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sysdeps/generic/dl-sysdep.c b/sysdeps/generic/dl-sysdep.c index 5994af3986..1b00775d72 100644 --- a/sysdeps/generic/dl-sysdep.c +++ b/sysdeps/generic/dl-sysdep.c @@ -45,6 +45,9 @@ extern fpu_control_t _dl_fpu_control; extern void _end; extern void ENTRY_POINT (void); +/* Protect SUID program against misuse of file descriptors. */ +extern void __libc_check_standard_fds (void); + ElfW(Addr) _dl_base_addr; int __libc_enable_secure; int __libc_multiple_libcs = 0; /* Defining this here avoids the inclusion @@ -167,6 +170,12 @@ _dl_sysdep_start (void **start_argptr, will see this new value and not clobber our data. */ __sbrk (_dl_pagesize - ((&_end - (void *) 0) & (_dl_pagesize - 1))); + /* If this is a SUID program we make sure that FDs 0, 1, and 2 are + allocated. If necessary we are doing it ourself. If it is not + possible we stop the program. */ + if (__builtin_expect (__libc_enable_secure, 0)) + __libc_check_standard_fds (); + (*dl_main) (phdr, phnum, &user_entry); return user_entry; } |