From 158043bae84bdcb988ecf423bf4b2eea5b12fb6e Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sun, 9 Sep 2018 11:33:17 +0200
Subject: [PATCH] avcodec/gifdec: check ff_lzw_decode_open() for failure

---
 libavcodec/gifdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/gifdec.c b/libavcodec/gifdec.c
index 2eeed4c4c7..a3116e417e 100644
--- a/libavcodec/gifdec.c
+++ b/libavcodec/gifdec.c
@@ -451,6 +451,8 @@ static av_cold int gif_decode_init(AVCodecContext *avctx)
     if (!s->frame)
         return AVERROR(ENOMEM);
     ff_lzw_decode_open(&s->lzw);
+    if (!s->lzw)
+        return AVERROR(ENOMEM);
     return 0;
 }