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* elf/dl-load.c (_dl_map_object_from_fd): We don't have to allow 

callers from libc anymore.

	* elf/dl-open.c (dl_open_worker): Pass __RTLD_AUDIT flag from caller
	to _dl_map_object_deps.
	* elf/dl-load.c (_dl_map_object_from_fd): Don't change memory
	protections when loading auditing modules.

	* dlfcn/dlopen.c (dlopen_doit): Catch invalid mode arguments and fail.
This commit is contained in:
Ulrich Drepper 2005-01-13 02:08:37 +00:00
parent 1b85ed0ce2
commit 3e539cb47e
4 changed files with 19 additions and 4 deletions
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10
ChangeLog
View File

@ -1,5 +1,15 @@
2005-01-12 Ulrich Drepper <drepper@redhat.com>
* elf/dl-load.c (_dl_map_object_from_fd): We don't have to allow
callers from libc anymore.
* elf/dl-open.c (dl_open_worker): Pass __RTLD_AUDIT flag from caller
to _dl_map_object_deps.
* elf/dl-load.c (_dl_map_object_from_fd): Don't change memory
protections when loading auditing modules.
* dlfcn/dlopen.c (dlopen_doit): Catch invalid mode arguments and fail.
* posix/getconf.c: Update copyright year.
* nss/getent.c: Likewise.
* nscd/nscd_nischeck.c: Likewise.

7
dlfcn/dlopen.c
View File

@ -1,5 +1,5 @@
/* Load a shared object at run time.
Copyright (C) 1995,96,97,98,99,2000,2003,2004 Free Software Foundation, Inc.
Copyright (C) 1995-2000,2003,2004,2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -18,6 +18,7 @@
02111-1307 USA. */
#include <dlfcn.h>
#include <libintl.h>
#include <stddef.h>
#include <unistd.h>
#include <ldsodefs.h>
@ -58,6 +59,10 @@ dlopen_doit (void *a)
{
struct dlopen_args *args = (struct dlopen_args *) a;
if (args->mode & ~(RTLD_BINDING_MASK | RTLD_NOLOAD | RTLD_DEEPBIND
| RTLD_GLOBAL | RTLD_LOCAL | RTLD_NODELETE))
GLRO(dl_signal_error) (0, NULL, NULL, _("invalid mode parameter"));
args->new = GLRO(dl_open) (args->file ?: "", args->mode | __RTLD_DLOPEN,
args->caller,
args->file == NULL ? LM_ID_BASE : NS,

4
elf/dl-load.c
View File

@ -1359,14 +1359,14 @@ cannot allocate TLS data structures for initial thread");
protection of the variable which contains the flags used in
the mprotect calls. */
#ifdef HAVE_Z_RELRO
if (mode & __RTLD_DLOPEN)
if ((mode & (__RTLD_DLOPEN | __RTLD_AUDIT)) == __RTLD_DLOPEN)
{
uintptr_t p = ((uintptr_t) &__stack_prot) & ~(GLRO(dl_pagesize) - 1);
size_t s = (uintptr_t) &__stack_prot - p + sizeof (int);
__mprotect ((void *) p, s, PROT_READ|PROT_WRITE);
if (__builtin_expect (__check_caller (RETURN_ADDRESS (0),
allow_ldso|allow_libc) == 0,
allow_ldso) == 0,
0))
__stack_prot |= PROT_EXEC;
__mprotect ((void *) p, s, PROT_READ);

2
elf/dl-open.c
View File

@ -305,7 +305,7 @@ dl_open_worker (void *a)
/* Load that object's dependencies. */
_dl_map_object_deps (new, NULL, 0, 0,
mode & (__RTLD_DLOPEN | RTLD_DEEPBIND));
mode & (__RTLD_DLOPEN | RTLD_DEEPBIND | __RTLD_AUDIT));
/* So far, so good. Now check the versions. */
for (i = 0; i < new->l_searchlist.r_nlist; ++i)