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-rw-r--r--src/thread/pthread_cond_timedwait.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/thread/pthread_cond_timedwait.c b/src/thread/pthread_cond_timedwait.c
index db2744ba..faa7c23b 100644
--- a/src/thread/pthread_cond_timedwait.c
+++ b/src/thread/pthread_cond_timedwait.c
@@ -37,6 +37,9 @@ int pthread_cond_timedwait(pthread_cond_t *c, pthread_mutex_t *m, const struct t
 	struct cm cm = { .c=c, .m=m };
 	int r, e=0, seq;
 
+	if ((m->_m_type&3) == PTHREAD_MUTEX_ERRORCHECK &&
+		(m->_m_lock&INT_MAX) != __pthread_self()->tid) return EPERM;
+
 	if (ts && ts->tv_nsec >= 1000000000UL)
 		return EINVAL;