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* elf/tst-execstack.c (do_test): Don't fail if SELinux forbids

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executable stacks.
This commit is contained in:
Ulrich Drepper
2007-12-17 00:00:57 +00:00
parent be8c1500c7
commit d9961b6a4f
2 changed files with 41 additions and 3 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2007-12-16 Ulrich Drepper <drepper@redhat.com> 2007-12-16 Ulrich Drepper <drepper@redhat.com>
* elf/tst-execstack.c (do_test): Don't fail if SELinux forbids
executable stacks.
* malloc/malloc.c (public_mTRIm): Iterate over all arenas and call * malloc/malloc.c (public_mTRIm): Iterate over all arenas and call
mTRIm for all of them. mTRIm for all of them.
(mTRIm): Additionally iterate over all free blocks and use madvise (mTRIm): Additionally iterate over all free blocks and use madvise

41
elf/tst-execstack.c
View File

@ -2,6 +2,7 @@
on load of a DSO that requires executable stacks. */ on load of a DSO that requires executable stacks. */
#include <dlfcn.h> #include <dlfcn.h>
#include <stdbool.h>
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
@ -45,9 +46,43 @@ waiter_thread (void *arg)
} }
#endif #endif
static bool allow_execstack = true;
static int static int
do_test (void) do_test (void)
{ {
/* Check whether SELinux is enabled and disallows executable stacks. */
FILE *fp = fopen ("/selinux/enforce", "r");
if (fp != NULL)
{
char *line = NULL;
size_t linelen = 0;
bool enabled = false;
ssize_t n = getline (&line, &linelen, fp);
if (n > 0 && line[0] != '0')
enabled = true;
fclose (fp);
if (enabled)
{
fp = fopen ("/selinux/booleans/allow_execstack", "r");
if (fp != NULL)
{
n = getline (&line, &linelen, fp);
if (n > 0 && line[0] == '0')
allow_execstack = false;
}
fclose (fp);
}
}
printf ("executable stacks %sallowed\n", allow_execstack ? "" : "not ");
static void *f; /* Address of this is used in other threads. */ static void *f; /* Address of this is used in other threads. */
#if USE_PTHREADS #if USE_PTHREADS
@ -77,7 +112,7 @@ do_test (void)
if (h == NULL) if (h == NULL)
{ {
printf ("cannot load: %s\n", dlerror ()); printf ("cannot load: %s\n", dlerror ());
return 1; return allow_execstack;
} }
f = dlsym (h, "tryme"); f = dlsym (h, "tryme");
@ -113,10 +148,10 @@ do_test (void)
Let them run to test it. */ Let them run to test it. */
pthread_barrier_wait (&go_barrier); pthread_barrier_wait (&go_barrier);
pthread_exit (0); pthread_exit (! allow_execstack);
#endif #endif
return 0; return ! allow_execstack;
} }
static void static void