1 files changed, 4 insertions, 0 deletions
diff --git a/src/buffer.c b/src/buffer.c
index 476bc135..ce12f491 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -299,6 +299,10 @@ int ssh_buffer_reinit(struct ssh_buffer_struct *buffer)
  */
 int ssh_buffer_add_data(struct ssh_buffer_struct *buffer, const void *data, uint32_t len)
 {
+    if (buffer == NULL) {
+        return -1;
+    }
+
     buffer_verify(buffer);
 
     if (data == NULL) {