lib/buffer: fix possible SEGV

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/lib/buffer.c b/lib/buffer.c
index d1d608ff58482c517bc1189ef2ef9d67693a0175..1dba7dd510c6c796b38b85b27317e92856326b94 100644 (file)
--- a/lib/buffer.c
+++ b/lib/buffer.c
@@ -155,6 +155,9 @@ int ul_buffer_append_data(struct ul_buffer *buf, const char *data, size_t sz)
 
 int ul_buffer_append_string(struct ul_buffer *buf, const char *str)
 {
+       if (!str)
+               return 0;
+
        return ul_buffer_append_data(buf, str, strlen(str));
 }