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authorUlrich Drepper <drepper@redhat.com>2000-07-10 20:02:00 +0000
committerUlrich Drepper <drepper@redhat.com>2000-07-10 20:02:00 +0000
commit47a81620adc8c33631bd4b3b8d122c2a17940f8c (patch)
treecc9128904b2033f9184b42a149d434e2d86ed7af /sysdeps
parent8fdc11384ea3bddaaba026c98d21fa608d7d7a1d (diff)
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Update.
2000-07-09 Mark Kettenis <kettenis@gnu.org> * elf/rtld.c (dl_main): Move call to __libc_check_standard_fds... * sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): ... to here. 2000-07-10 Ulrich Drepper <drepper@redhat.com> * include/features.h: Include ISO C99 features if the compiler used is an ISO C99 compiler. Patch by Joseph S. Myers <jsm28@cam.ac.uk>. 2000-07-08 Mark Kettenis <kettenis@gnu.org> * iconv/gconv_conf.c: Include <bits/libc-lock.h>.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/generic/dl-sysdep.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/sysdeps/generic/dl-sysdep.c b/sysdeps/generic/dl-sysdep.c
index 5994af3..1b00775 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;
}