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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-03-02 15:58:14 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-05-06 00:57:10 +0200 |
| commit | c785a7058aa6c4b89ea1fa02278eee88006dce45 (patch) | |
| tree | c6400f975ad72ece896b5043de62052d669a143b /libavcodec/h261dec.c | |
| parent | 6736de0ce628a2799ea4d1150b7a92a80f09c45a (diff) | |
| download | ffmpeg-c785a7058aa6c4b89ea1fa02278eee88006dce45.tar.gz | |
h261: check mtype.
Fixes out of array read
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit ec3cd74f2dab8e3e8234ccb994132b23d3098585)
Diffstat (limited to 'libavcodec/h261dec.c')
| -rw-r--r-- | libavcodec/h261dec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/h261dec.c b/libavcodec/h261dec.c index 1dbd75d103..3b26e8bdbc 100644 --- a/libavcodec/h261dec.c +++ b/libavcodec/h261dec.c @@ -286,6 +286,10 @@ static int h261_decode_mb(H261Context *h){ // Read mtype h->mtype = get_vlc2(&s->gb, h261_mtype_vlc.table, H261_MTYPE_VLC_BITS, 2); + if (h->mtype < 0) { + av_log(s->avctx, AV_LOG_ERROR, "illegal mtype %d\n", h->mtype); + return SLICE_ERROR; + } h->mtype = h261_mtype_map[h->mtype]; // Read mquant |