From 4c2d4e8700cd3db59bc11ab196c0002215cf601f Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Fri, 16 Oct 2015 20:15:48 +0200
Subject: [PATCH] avcodec/ffv1dec: Clear slice coordinates if they are invalid
 or slice header decoding fails for other reasons

Fixes Ticket4931

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/ffv1dec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index a8d5e33da9..c32f7178c5 100644
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -408,6 +408,7 @@ static int decode_slice(AVCodecContext *c, void *arg)
         if (ff_ffv1_init_slice_state(f, fs) < 0)
             return AVERROR(ENOMEM);
         if (decode_slice_header(f, fs) < 0) {
+            fs->slice_x = fs->slice_y = fs->slice_height = fs->slice_width = 0;
             fs->slice_damaged = 1;
             return AVERROR_INVALIDDATA;
         }