Merge pull request #4486 from rlefko/fix-pthread-init-memleak

Fix memory leak in pthread init functions on failure

lib/common/threading.c

@@ -143,7 +143,14 @@ int ZSTD_pthread_mutex_init(ZSTD_pthread_mutex_t* mutex, pthread_mutexattr_t con
     *mutex = (pthread_mutex_t*)ZSTD_malloc(sizeof(pthread_mutex_t));
     if (!*mutex)
         return 1;
-    return pthread_mutex_init(*mutex, attr);
+    {
+        int const ret = pthread_mutex_init(*mutex, attr);
+        if (ret != 0) {
+            ZSTD_free(*mutex);
+            *mutex = NULL;
+        }
+        return ret;
+    }
 }
 
 int ZSTD_pthread_mutex_destroy(ZSTD_pthread_mutex_t* mutex)
@@ -164,7 +171,14 @@ int ZSTD_pthread_cond_init(ZSTD_pthread_cond_t* cond, pthread_condattr_t const*
     *cond = (pthread_cond_t*)ZSTD_malloc(sizeof(pthread_cond_t));
     if (!*cond)
         return 1;
-    return pthread_cond_init(*cond, attr);
+    {
+        int const ret = pthread_cond_init(*cond, attr);
+        if (ret != 0) {
+            ZSTD_free(*cond);
+            *cond = NULL;
+        }
+        return ret;
+    }
 }
 
 int ZSTD_pthread_cond_destroy(ZSTD_pthread_cond_t* cond)