RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2025-01-19 22:01:00 +00:00
Code Issues Projects Releases Wiki Activity

avcodec/jpeg2000dec: Check cdx/y values more carefully

Browse Source 
Some invalid values where not handled correctly in the later pixel
format matching code.
Fixes out of array accesses
Fixes Ticket2848

Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-08-21 04:40:50 +02:00
parent c443689afb
commit 8bb11c3ca7
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
libavcodec/jpeg2000dec.c
View File

@ -273,7 +273,8 @@ static int get_siz(Jpeg2000DecoderContext *s)
s->sgnd[i] = !!(x & 0x80);
s->cdx[i] = bytestream2_get_byteu(&s->g);
s->cdy[i] = bytestream2_get_byteu(&s->g);
if (!s->cdx[i] || !s->cdy[i]) {
if ( !s->cdx[i] || s->cdx[i] == 3 || s->cdx[i] > 4
|| !s->cdy[i] || s->cdy[i] == 3 || s->cdy[i] > 4) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid sample seperation\n");
return AVERROR_INVALIDDATA;
}