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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-11-29 23:10:03 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-11-29 23:12:42 +0100 |
| commit | 0b28abf903cd1fd61ba4a06009cd2cb7cc40e6e0 (patch) | |
| tree | d82e98e4888b24bf3dda5f9a45a1994bd7b4577f /libavcodec/vble.c | |
| parent | 10416a4d56fa8a89784e4fb62099c3cab17a9952 (diff) | |
| download | ffmpeg-0b28abf903cd1fd61ba4a06009cd2cb7cc40e6e0.tar.gz | |
vble: check packet size.
Fixes null pointer dereference
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/vble.c')
| -rw-r--r-- | libavcodec/vble.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/vble.c b/libavcodec/vble.c index 448006a0c3..2c681782bd 100644 --- a/libavcodec/vble.c +++ b/libavcodec/vble.c @@ -127,6 +127,11 @@ static int vble_decode_frame(AVCodecContext *avctx, void *data, int *data_size, if (pic->data[0]) avctx->release_buffer(avctx, pic); + if (avpkt->size < 4 || avpkt->size - 4 > INT_MAX/8) { + av_log(avctx, AV_LOG_ERROR, "Invalid packet size\n"); + return AVERROR_INVALIDDATA; + } + /* Allocate buffer */ if (avctx->get_buffer(avctx, pic) < 0) { av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n"); |