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authorRich Felker <dalias@aerifal.cx>2012-10-19 15:02:37 -0400
committerRich Felker <dalias@aerifal.cx>2012-10-19 15:02:37 -0400
commit599f97360389911c293e0ca4c5eb49e007377fba (patch)
tree9df3f1e50357956c4cc76cd8e2872f342c80bf3c /src/process/posix_spawn.c
parentebee8c2b477807fe58fd35d35783633ea08b049c (diff)
downloadmusl-599f97360389911c293e0ca4c5eb49e007377fba.tar.gz
fix usage of locks with vfork
__release_ptc() is only valid in the parent; if it's performed in the child, the lock will be unlocked early then double-unlocked later, corrupting the lock state.
Diffstat (limited to 'src/process/posix_spawn.c')
-rw-r--r--src/process/posix_spawn.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/process/posix_spawn.c b/src/process/posix_spawn.c
index c3e800b8..5eb516b0 100644
--- a/src/process/posix_spawn.c
+++ b/src/process/posix_spawn.c
@@ -35,9 +35,9 @@ int __posix_spawnx(pid_t *restrict res, const char *restrict path,
__acquire_ptc();
pid = __vfork();
- __release_ptc();
if (pid) {
+ __release_ptc();
sigprocmask(SIG_SETMASK, &oldmask, 0);
if (pid < 0) return -pid;
*res = pid;