summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--src/thread/pthread_mutex_unlock.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/thread/pthread_mutex_unlock.c b/src/thread/pthread_mutex_unlock.c
index 5855db0b..6c4d7f22 100644
--- a/src/thread/pthread_mutex_unlock.c
+++ b/src/thread/pthread_mutex_unlock.c
@@ -5,9 +5,11 @@ int pthread_mutex_unlock(pthread_mutex_t *m)
pthread_t self;
if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
+ if (!m->_m_lock)
+ return EPERM;
self = __pthread_self();
if ((m->_m_lock&0x1fffffff) != self->tid)
- return EPERM;
+ return EPERM;
if ((m->_m_type&3) == PTHREAD_MUTEX_RECURSIVE && --m->_m_count)
return 0;
if (m->_m_type >= 4) {