summaryrefslogtreecommitdiff
path: root/src/process/system.c
diff options
context:
space:
mode:
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/system.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/system.c')
-rw-r--r--src/process/system.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/process/system.c b/src/process/system.c
index c8f26008..ebe207f5 100644
--- a/src/process/system.c
+++ b/src/process/system.c
@@ -29,7 +29,8 @@ int system(const char *cmd)
__acquire_ptc();
pid = __vfork();
- __release_ptc();
+
+ if (pid) __release_ptc();
if (pid > 0) {
sigset_t new = old;