RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2025-02-21 14:26:59 +00:00
Code Issues Projects Releases Wiki Activity

avcodec/flashsv: check diff_start/height

Browse Source 
Fixes out of array accesses
Fixes Ticket2844

Found-by: ami_stuff
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 880c73cd76)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-08-20 23:18:48 +02:00
parent 3e817d91ef
commit deb8d0d6a1
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
libavcodec/flashsv.c
View File

@ -387,6 +387,10 @@ static int flashsv_decode_frame(AVCodecContext *avctx, void *data,
}
s->diff_start = get_bits(&gb, 8);
s->diff_height = get_bits(&gb, 8);
if (s->diff_start + s->diff_height > cur_blk_height) {
av_log(avctx, AV_LOG_ERROR, "Block parameters invalid\n");
return AVERROR_INVALIDDATA;
}
av_log(avctx, AV_LOG_DEBUG,
"%dx%d diff start %d height %d\n",
i, j, s->diff_start, s->diff_height);