some additional checks

2 files changed, 7 insertions, 0 deletions

diff --git a/libs/pthreads/src/pthread_mutex_trylock.c b/libs/pthreads/src/pthread_mutex_trylock.c
index d6b68724db..5728728b62 100644
--- a/libs/pthreads/src/pthread_mutex_trylock.c
+++ b/libs/pthreads/src/pthread_mutex_trylock.c
@@ -64,6 +64,10 @@ pthread_mutex_trylock (pthread_mutex_t * mutex)
     }
 
   mx = *mutex;
+  if (mx == NULL) {
+	  return EINVAL;
+  }
+
   kind = mx->kind;
 
   if (kind >= 0)
diff --git a/libs/pthreads/src/pthread_mutex_unlock.c b/libs/pthreads/src/pthread_mutex_unlock.c
index 3d65d1a957..77175bb5da 100644
--- a/libs/pthreads/src/pthread_mutex_unlock.c
+++ b/libs/pthreads/src/pthread_mutex_unlock.c
@@ -50,6 +50,9 @@ pthread_mutex_unlock (pthread_mutex_t * mutex)
    */
 
   mx = *mutex;
+  if (mx == NULL) {
+	  return EINVAL;
+  }
 
   /*
    * If the thread calling us holds the mutex then there is no