From 75f418064ecf5c2713151cbe6b3a716d2c047f1d Mon Sep 17 00:00:00 2001
From: Joakim Plate <elupus@ecce.se>
Date: Wed, 14 Sep 2011 19:24:07 +0200
Subject: [cafdec] Check return value of avio_seek and avoid modifying state if
 it fails

---
 libavformat/cafdec.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'libavformat/cafdec.c')

diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index 8b0daddd58..0938e1a0d7 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -366,6 +366,7 @@ static int read_seek(AVFormatContext *s, int stream_index,
 {
     AVStream *st = s->streams[0];
     CaffContext *caf = s->priv_data;
+    CaffContext caf2 = *caf;
     int64_t pos;
 
     timestamp = FFMAX(timestamp, 0);
@@ -385,7 +386,10 @@ static int read_seek(AVFormatContext *s, int stream_index,
         return -1;
     }
 
-    avio_seek(s->pb, pos + caf->data_start, SEEK_SET);
+    if (avio_seek(s->pb, pos + caf->data_start, SEEK_SET) < 0) {
+        *caf = caf2;
+        return -1;
+    }
     return 0;
 }
 
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