[PATCH 5/5] libtrivfs: fix an use-after-free error

[Justus Winter]

Found using the Clang Static Analyzer.

* libtrivfs/protid-clean.c (trivfs_clean_protid): Fix use-after-free error.
---
 libtrivfs/protid-clean.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libtrivfs/protid-clean.c b/libtrivfs/protid-clean.c
index 856d7af..575dec3 100644
--- a/libtrivfs/protid-clean.c
+++ b/libtrivfs/protid-clean.c
@@ -39,10 +39,13 @@ trivfs_clean_protid (void *arg)
     }
   if (--cred->po->refcnt == 0)
     {
+      struct trivfs_control *cntl = cred->po->cntl;
       ports_port_deref (cred->po->cntl);
       free (cred->po);
+      pthread_mutex_unlock (&cntl->lock);
     }
-  pthread_mutex_unlock (&cred->po->cntl->lock);
+  else
+    pthread_mutex_unlock (&cred->po->cntl->lock);
 
   iohelp_free_iouser (cred->user);
 
-- 
1.7.10.4