fix parent-memory-clobber in posix_spawn (environ)

1 files changed, 3 insertions, 4 deletions

diff --git a/src/process/posix_spawn.c b/src/process/posix_spawn.c
index e8557487..c3e800b8 100644
--- a/src/process/posix_spawn.c
+++ b/src/process/posix_spawn.c
@@ -19,7 +19,7 @@ weak_alias(dummy_0, __release_ptc);
 pid_t __vfork(void);
 
 int __posix_spawnx(pid_t *restrict res, const char *restrict path,
-	int (*exec)(const char *, char *const *),
+	int (*exec)(const char *, char *const *, char *const *),
 	const posix_spawn_file_actions_t *fa,
 	const posix_spawnattr_t *restrict attr,
 	char *const argv[restrict], char *const envp[restrict])
@@ -95,8 +95,7 @@ int __posix_spawnx(pid_t *restrict res, const char *restrict path,
 	sigprocmask(SIG_SETMASK, (attr->__flags & POSIX_SPAWN_SETSIGMASK)
 		? &attr->__mask : &oldmask, 0);
 
-	if (envp) environ = (char **)envp;
-	exec(path, argv);
+	exec(path, argv, envp ? envp : environ);
 	_exit(127);
 
 	return 0;
@@ -107,5 +106,5 @@ int posix_spawn(pid_t *restrict res, const char *restrict path,
 	const posix_spawnattr_t *restrict attr,
 	char *const argv[restrict], char *const envp[restrict])
 {
-	return __posix_spawnx(res, path, execv, fa, attr, argv, envp);
+	return __posix_spawnx(res, path, execve, fa, attr, argv, envp);
 }