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posix: Fix posix_spawn invalid memory access

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Current Linux posix_spawn spawn do not test if the pid argument is
valid before trying to update it for success case.  This patch fixes
it.

Tested on x86_64 and i686.

	* sysdeps/unix/sysv/linux/spawni.c (__spawnix): Fix invalid memory
	access where posix_spawn success and pid argument is null.
	* posix/tst-spawn.c (do_test): Add posix_spawn null pid argument for
	success case.
This commit is contained in:
Adhemerval Zanella 2016-03-20 17:35:24 -03:00
parent 0e8e593d73
commit 2a69f853c0
3 changed files with 12 additions and 1 deletions
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7
ChangeLog
View File

@ -1,3 +1,10 @@
2016-03-20 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/unix/sysv/linux/spawni.c (__spawnix): Fix invalid memory
access where posix_spawn success and pid argument is null.
* posix/tst-spawn.c (do_test): Add posix_spawn null pid argument for
success case.
2016-03-20 Samuel Thibault <samuel.thibault@ens-lyon.org>:
* sysdeps/mach/hurd/i386/c++-types.data: New file.

4
posix/tst-spawn.c
View File

@ -257,6 +257,10 @@ do_test (int argc, char *argv[])
if (posix_spawn (&pid, argv[1], &actions, NULL, spargv, environ) != 0)
error (EXIT_FAILURE, errno, "posix_spawn");
/* Same test but with a NULL pid argument. */
if (posix_spawn (NULL, argv[1], &actions, NULL, spargv, environ) != 0)
error (EXIT_FAILURE, errno, "posix_spawn");
/* Cleanup. */
if (posix_spawn_file_actions_destroy (&actions) != 0)
error (EXIT_FAILURE, errno, "posix_spawn_file_actions_destroy");

2
sysdeps/unix/sysv/linux/spawni.c
View File

@ -381,7 +381,7 @@ __spawnix (pid_t * pid, const char *file,
close_not_cancel (args.pipe[0]);
if (!ec && new_pid)
if (!ec && pid)
*pid = new_pid;
__sigprocmask (SIG_SETMASK, &args.oldmask, 0);