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Don't use INTVARDEF/INTUSE with __libc_enable_secure (bug 14132).

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Continuing the removal of the obsolete INTDEF / INTVARDEF / INTUSE
mechanism, this patch replaces its use for __libc_enable_secure with
the use of rtld_hidden_data_def and rtld_hidden_proto.

Tested for x86_64 that installed stripped shared libraries are
unchanged by the patch.

	[BZ #14132]
	* elf/dl-sysdep.c (__libc_enable_secure): Use rtld_hidden_data_def
	instead of INTVARDEF.
	(_dl_sysdep_start): Do not use INTUSE with __libc_enable_secure.
	* sysdeps/mach/hurd/dl-sysdep.c (__libc_enable_secure): Use
	rtld_hidden_data_def instead of INTVARDEF.
	(_dl_sysdep_start): Do not use INTUSE with __libc_enable_secure.
	* elf/dl-deps.c (expand_dst): Likewise.
	* elf/dl-load.c (_dl_dst_count): Likewise.
	(_dl_dst_substitute): Likewise.
	(decompose_rpath): Likewise.
	(_dl_init_paths): Likewise.
	(open_path): Likewise.
	(_dl_map_object): Likewise.
	* elf/rtld.c (dl_main): Likewise.
	(process_dl_audit): Likewise.
	(process_envvars): Likewise.
	* include/unistd.h [IS_IN_rtld] (__libc_enable_secure_internal):
	Remove declaration.
	(__libc_enable_secure): Use rtld_hidden_proto.
This commit is contained in:
Joseph Myers
2014-10-10 11:13:11 +00:00
parent b8c80a7e0d
commit 6bc6bd3b10
7 changed files with 48 additions and 28 deletions
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18
elf/rtld.c
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@@ -1498,7 +1498,7 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
/* Prevent optimizing strsep. Speed is not important here. */
while ((p = (strsep) (&list, " :")) != NULL)
if (p[0] != '\0'
&& (__builtin_expect (! INTUSE(__libc_enable_secure), 1)
&& (__builtin_expect (! __libc_enable_secure, 1)
|| strchr (p, '/') == NULL))
npreloads += do_preload (p, main_map, "LD_PRELOAD");
@@ -2318,7 +2318,7 @@ process_dl_audit (char *str)
while ((p = (strsep) (&str, ":")) != NULL)
if (p[0] != '\0'
&& (__builtin_expect (! INTUSE(__libc_enable_secure), 1)
&& (__builtin_expect (! __libc_enable_secure, 1)
|| strchr (p, '/') == NULL))
{
/* This is using the local malloc, not the system malloc. The
@@ -2352,7 +2352,7 @@ process_envvars (enum mode *modep)
/* This is the default place for profiling data file. */
GLRO(dl_profile_output)
= &"/var/tmp\0/var/profile"[INTUSE(__libc_enable_secure) ? 9 : 0];
= &"/var/tmp\0/var/profile"[__libc_enable_secure ? 9 : 0];
while ((envline = _dl_next_ld_env_entry (&runp)) != NULL)
{
@@ -2420,7 +2420,7 @@ process_envvars (enum mode *modep)
case 9:
/* Test whether we want to see the content of the auxiliary
array passed up from the kernel. */
if (!INTUSE(__libc_enable_secure)
if (!__libc_enable_secure
&& memcmp (envline, "SHOW_AUXV", 9) == 0)
_dl_show_auxv ();
break;
@@ -2434,7 +2434,7 @@ process_envvars (enum mode *modep)
case 11:
/* Path where the binary is found. */
if (!INTUSE(__libc_enable_secure)
if (!__libc_enable_secure
&& memcmp (envline, "ORIGIN_PATH", 11) == 0)
GLRO(dl_origin_path) = &envline[12];
break;
@@ -2454,7 +2454,7 @@ process_envvars (enum mode *modep)
break;
}
if (!INTUSE(__libc_enable_secure)
if (!__libc_enable_secure
&& memcmp (envline, "DYNAMIC_WEAK", 12) == 0)
GLRO(dl_dynamic_weak) = 1;
break;
@@ -2465,7 +2465,7 @@ process_envvars (enum mode *modep)
#ifdef EXTRA_LD_ENVVARS_13
EXTRA_LD_ENVVARS_13
#endif
if (!INTUSE(__libc_enable_secure)
if (!__libc_enable_secure
&& memcmp (envline, "USE_LOAD_BIAS", 13) == 0)
{
GLRO(dl_use_load_bias) = envline[14] == '1' ? -1 : 0;
@@ -2478,7 +2478,7 @@ process_envvars (enum mode *modep)
case 14:
/* Where to place the profiling data file. */
if (!INTUSE(__libc_enable_secure)
if (!__libc_enable_secure
&& memcmp (envline, "PROFILE_OUTPUT", 14) == 0
&& envline[15] != '\0')
GLRO(dl_profile_output) = &envline[15];
@@ -2516,7 +2516,7 @@ process_envvars (enum mode *modep)
/* Extra security for SUID binaries. Remove all dangerous environment
variables. */
if (__builtin_expect (INTUSE(__libc_enable_secure), 0))
if (__builtin_expect (__libc_enable_secure, 0))
{
static const char unsecure_envvars[] =
#ifdef EXTRA_UNSECURE_ENVVARS