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74630b1bb7
If the pidfd_spawn/pidfd_spawnp helper process succeeds, but evecve
fails for some reason (either with an invalid/non-existent, memory
allocation, etc.) the resulting pidfd is never closed, nor returned
to caller (so it can call close).
Since the process creation failed, it should be up to posix_spawn to
also, close the file descriptor in this case (similar to what it
does to reap the process).
This patch also changes the waitpid with waitid (P_PIDFD) for pidfd
case, to avoid a possible pid re-use.
Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit c90cfce849)
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* Further tests for spawn in case of invalid binary paths.
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Copyright (C) 2016-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <spawn.h>
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#include <error.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <support/check.h>
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#include <support/descriptors.h>
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#include <tst-spawn.h>
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int
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do_test (void)
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{
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/* Check if posix_spawn correctly returns an error and an invalid pid
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by trying to spawn an invalid binary. */
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const char *program = "/path/to/invalid/binary";
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char * const args[] = { 0 };
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PID_T_TYPE pid = -1;
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{
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struct support_descriptors *descrs = support_descriptors_list ();
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int ret = POSIX_SPAWN (&pid, program, 0, 0, args, environ);
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if (ret != ENOENT)
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{
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errno = ret;
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FAIL_EXIT1 ("posix_spawn: %m");
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}
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/* POSIX states the value returned on pid variable in case of an error
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is not specified. GLIBC will update the value iff the child
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execution is successful. */
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if (pid != -1)
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FAIL_EXIT1 ("posix_spawn returned pid != -1 (%i)", (int) pid);
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/* Check if no child is actually created. */
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TEST_COMPARE (WAITID (P_ALL, 0, NULL, WEXITED), -1);
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TEST_COMPARE (errno, ECHILD);
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/* Also check if there is no leak descriptors. */
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support_descriptors_check (descrs);
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support_descriptors_free (descrs);
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}
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{
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/* Same as before, but with posix_spawnp. */
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char *args2[] = { (char*) program, 0 };
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struct support_descriptors *descrs = support_descriptors_list ();
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int ret = POSIX_SPAWNP (&pid, args2[0], 0, 0, args2, environ);
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if (ret != ENOENT)
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{
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errno = ret;
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FAIL_EXIT1 ("posix_spawnp: %m");
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}
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if (pid != -1)
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FAIL_EXIT1 ("posix_spawnp returned pid != -1 (%i)", (int) pid);
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TEST_COMPARE (WAITID (P_ALL, 0, NULL, WEXITED), -1);
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TEST_COMPARE (errno, ECHILD);
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support_descriptors_check (descrs);
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support_descriptors_free (descrs);
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}
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return 0;
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}
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#include <support/test-driver.c>
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