[FFmpeg-devel] [PATCH 7/7] Prevent NULL dereferences when missing the reference frame in the xan decoder.

[fenrir at elivagar.org]

From: Laurent Aimar <fenrir at videolan.org>

---
 libavcodec/xan.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/libavcodec/xan.c b/libavcodec/xan.c
index 2a66b65..1b288ee 100644
--- a/libavcodec/xan.c
+++ b/libavcodec/xan.c
@@ -226,6 +226,8 @@ static inline void xan_wc3_copy_pixel_run(XanContext *s,
 
     palette_plane = s->current_frame.data[0];
     prev_palette_plane = s->last_frame.data[0];
+    if (!prev_palette_plane)
+        prev_palette_plane = palette_plane;
     stride = s->current_frame.linesize[0];
     line_inc = stride - width;
     curframe_index = y * stride + x;
-- 
1.7.2.5