virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-07-06 06:27:36 +02:00
Code Issues Releases Activity

avcodec/mjpegdec: Add some sanity checks to ljpeg_decode_rgb_scan()

Browse Source 
These prevent the rgb ljpeg code from being run on parameters that it doesnt
support. No testcase available but it seems possible to trigger these.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2013-09-05 00:36:44 +02:00
parent f974289671
commit 61c68000ed
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
libavcodec/mjpegdec.c
View File

@ -794,6 +794,12 @@ static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int p
int resync_mb_y = 0; int resync_mb_y = 0;
int resync_mb_x = 0; int resync_mb_x = 0;
if (s->nb_components != 3 && s->nb_components != 4)
return AVERROR_INVALIDDATA;
if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
return AVERROR_INVALIDDATA;
s->restart_count = s->restart_interval; s->restart_count = s->restart_interval;
av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,