From ad7f7c87f0e86d3e0e2eeb45e9170111b40d4825 Mon Sep 17 00:00:00 2001
From: Nicholas Jackson <nicholas.jackson@zii.aero>
Date: Tue, 19 Jan 2021 13:19:31 -0800
Subject: avmux: fix segfault when a plugin's long_name is NULL

Some plugins register an empty long_name field.  Check for this
before calling strcmp to avoid a crash.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-libav/-/merge_requests/114>
---
 ext/libav/gstavmux.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/ext/libav/gstavmux.c b/ext/libav/gstavmux.c
index 325a79d..32c1832 100644
--- a/ext/libav/gstavmux.c
+++ b/ext/libav/gstavmux.c
@@ -921,9 +921,11 @@ gst_ffmpegmux_register (GstPlugin * plugin)
       continue;
     }
 
-    if ((!strncmp (in_plugin->long_name, "raw ", 4))) {
-      GST_LOG ("Ignoring raw muxer %s", in_plugin->name);
-      continue;
+    if (in_plugin->long_name != NULL) {
+      if ((!strncmp (in_plugin->long_name, "raw ", 4))) {
+        GST_LOG ("Ignoring raw muxer %s", in_plugin->name);
+        continue;
+      }
     }
 
     if (gst_ffmpegmux_get_replacement (in_plugin->name))
-- 
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