lib: buffer_free() - Check for buf==NULL before using container_of()

Helps with static analyzer complaints.

diff --git a/src/lib/buffer.c b/src/lib/buffer.c
index 55f230b321e3b35279ccb535162db7036f78a147..f6f3a0f9eca6a25ca5d4f048191574f93efb9a30 100644 (file)
--- a/src/lib/buffer.c
+++ b/src/lib/buffer.c
@@ -184,10 +184,9 @@ buffer_t *buffer_create_dynamic_max(pool_t pool, size_t init_size,
 
 void buffer_free(buffer_t **_buf)
 {
-       struct real_buffer *buf = container_of(*_buf, struct real_buffer, buf);
-
-       if (buf == NULL)
+       if (*_buf == NULL)
                return;
+       struct real_buffer *buf = container_of(*_buf, struct real_buffer, buf);
 
        *_buf = NULL;
        if (buf->alloced)