From 66c15bc753f2aeb58fd08dd08354e3b0ae043192 Mon Sep 17 00:00:00 2001
From: Xabier Rodriguez Calvar <calvaris@igalia.com>
Date: Tue, 2 May 2023 11:32:01 +0200
Subject: [PATCH] qtdemux: Fix segfault in cenc sample grouping

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4523>
---
 subprojects/gst-plugins-good/gst/isomp4/qtdemux.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c b/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
index 8c09438da1..3d668a9c8e 100644
--- a/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
+++ b/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
@@ -4428,7 +4428,8 @@ qtdemux_parse_moof (GstQTDemux * qtdemux, const guint8 * buffer, guint length,
       goto missing_tfhd;
 
     /* Sample grouping support */
-    if (stream->protected && (stream->protection_scheme_type == FOURCC_cenc
+    if (stream != NULL && stream->protected
+        && (stream->protection_scheme_type == FOURCC_cenc
             || stream->protection_scheme_type == FOURCC_cbcs)) {
       QtDemuxCencSampleSetInfo *info = stream->protection_scheme_info;
       GNode *sbgp_node, *sgpd_node;