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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-09-05 00:36:44 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-09-27 02:52:04 +0200 |
| commit | 4a5bb426e26ed8d46e5ece4ab90ff936499d8536 (patch) | |
| tree | 0f1d040ab25ebab170d3e10a1833abbecdc1f015 | |
| parent | a99aff4e4bbef8e64b51f267cd1769214e1b4e80 (diff) | |
| download | ffmpeg-4a5bb426e26ed8d46e5ece4ab90ff936499d8536.tar.gz | |
avcodec/mjpegdec: Add some sanity checks to ljpeg_decode_rgb_scan()
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>
(cherry picked from commit 61c68000eda643dfce96dc46b488d39fd5c4e309)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/mjpegdec.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 662f0b4674..929235103d 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -719,6 +719,12 @@ static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int p int resync_mb_y = 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; av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, |