Check the pointer before calling a function on it, or we will crash.

This is a very rare situation where the server is totally broken.

diff --git a/ext/mysqlnd/mysqlnd_wireprotocol.c b/ext/mysqlnd/mysqlnd_wireprotocol.c
index 2924827e9c00cdcdc809dbb5dca2f20d040909bd..bec4fde410e8a234e2b73a319afe056d4a4b61bf 100644 (file)
--- a/ext/mysqlnd/mysqlnd_wireprotocol.c
+++ b/ext/mysqlnd/mysqlnd_wireprotocol.c
@@ -1344,7 +1344,7 @@ php_mysqlnd_read_row_ex(MYSQLND *conn, MYSQLND_MEMORY_POOL_CHUNK **buffer,
                        break;
                }
        }
-       if (ret == FAIL) {
+       if (ret == FAIL && (*buffer)) {
                (*buffer)->free_chunk((*buffer), TRUE TSRMLS_CC);
                *buffer = NULL;
        }