diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2012-11-15 00:42:49 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-11-15 00:43:30 +0100 |
| commit | 12eb2fd5394813a6119912b22f5dfc17b4a6b4a0 (patch) | |
| tree | ecdb82d11a75adfcdb274c75be09d31bed0d00a7 /libavcodec/dxa.c | |
| parent | e70144cba13db208877e3b64802fc8835c72e82d (diff) | |
| download | ffmpeg-12eb2fd5394813a6119912b22f5dfc17b4a6b4a0.tar.gz | |
dxa: dont try to use the previous frame if there is none.
Fixes null pointer dereference.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/dxa.c')
| -rw-r--r-- | libavcodec/dxa.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/dxa.c b/libavcodec/dxa.c index 13b63df926..d43e1134e2 100644 --- a/libavcodec/dxa.c +++ b/libavcodec/dxa.c @@ -256,7 +256,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac c->pic.key_frame = !(compr & 1); c->pic.pict_type = (compr & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I; for(j = 0; j < avctx->height; j++){ - if(compr & 1){ + if((compr & 1) && tmpptr){ for(i = 0; i < avctx->width; i++) outptr[i] = srcptr[i] ^ tmpptr[i]; tmpptr += stride; |