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tst-env-setuid: Delete LD_DEBUG_OUTPUT output 

Update tst-env-setuid.c to delete LD_DEBUG_OUTPUT output, instead of
leaving it behind.

This partially fixes BZ #33182.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
H.J. Lu 2025-07-19 07:43:29 -07:00
parent 6463d4a7b2
commit 5d23dfb289
1 changed files with 22 additions and 4 deletions
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26
elf/tst-env-setuid.c
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@ -40,6 +40,8 @@ static char SETGID_CHILD[] = "setgid-child";
# define PROFILE_LIB "tst-sonamemove-runmod2.so"
#endif
#define LD_DEBUG_OUTPUT "/tmp/some-file"
struct envvar_t
{
const char *env;
@ -61,7 +63,7 @@ static const struct envvar_t filtered_envvars[] =
{ "MALLOC_TRIM_THRESHOLD_", FILTERED_VALUE },
{ "RES_OPTIONS", FILTERED_VALUE },
{ "LD_DEBUG", "all" },
{ "LD_DEBUG_OUTPUT", "/tmp/some-file" },
{ "LD_DEBUG_OUTPUT", LD_DEBUG_OUTPUT },
{ "LD_WARN", FILTERED_VALUE },
{ "LD_VERBOSE", FILTERED_VALUE },
{ "LD_BIND_NOW", "0" },
@ -74,6 +76,14 @@ static const struct envvar_t unfiltered_envvars[] =
{ "LD_ASSUME_KERNEL", UNFILTERED_VALUE },
};
static void
unlink_ld_debug_output (pid_t pid)
{
char *output = xasprintf ("%s.%d", LD_DEBUG_OUTPUT, pid);
unlink (output);
free (output);
}
static int
test_child (void)
{
@ -138,13 +148,21 @@ do_test (int argc, char **argv)
/* Setgid child process. */
if (argc == 2 && strcmp (argv[1], SETGID_CHILD) == 0)
{
pid_t ppid = getppid ();
if (getgid () == getegid ())
/* This can happen if the file system is mounted nosuid. */
FAIL_UNSUPPORTED ("SGID failed: GID and EGID match (%jd)\n",
(intmax_t) getgid ());
{
/* This can happen if the file system is mounted nosuid. */
unlink_ld_debug_output (ppid);
FAIL_UNSUPPORTED ("SGID failed: GID and EGID match (%jd)\n",
(intmax_t) getgid ());
}
int ret = test_child ();
unlink_ld_debug_output (ppid);
if (ret != 0)
exit (1);
return 0;