[FFmpeg-cvslog] ape: Fix null ptr dereference with files missing a seekatable.

[Michael Niedermayer]

ffmpeg | branch: release/0.8 | Michael Niedermayer <michaelni at gmx.at> | Tue May 29 19:50:15 2012 +0200| [b3e5c8de6a46dd5acb510147df22818d8a971607] | committer: Michael Niedermayer

ape: Fix null ptr dereference with files missing a seekatable.

Such files are currently not supported as the table is used at several points

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit e7cb161515fc9fb6d30d1681d64d9ba7ad737a4e)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b3e5c8de6a46dd5acb510147df22818d8a971607
---

 libavformat/ape.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/ape.c b/libavformat/ape.c
index b0f2394..7e18a40 100644
--- a/libavformat/ape.c
+++ b/libavformat/ape.c
@@ -274,6 +274,9 @@ static int ape_read_header(AVFormatContext * s, AVFormatParameters * ap)
             return AVERROR(ENOMEM);
         for (i = 0; i < ape->seektablelength / sizeof(uint32_t); i++)
             ape->seektable[i] = avio_rl32(pb);
+    }else{
+        av_log(s, AV_LOG_ERROR, "Missing seektable\n");
+        return -1;
     }
 
     ape->frames[0].pos     = ape->firstframe;