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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-11-22 16:51:07 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-11-22 17:02:00 +0100 |
| commit | 6060234d43dcf0b5200cdd7dbd2f1542146827eb (patch) | |
| tree | ae3781076eeb3894cb26bea3a61c162d42405131 /libavcodec/mjpegdec.c | |
| parent | ba992711f79ccfba4ff0b305215d7056faf0ed0d (diff) | |
| download | ffmpeg-6060234d43dcf0b5200cdd7dbd2f1542146827eb.tar.gz | |
avcodec/mjpegdec: check len in mjpeg_decode_app() more completely
Avoids len from becoming negative and causing assertion failure
Fixes: signal_sigabrt_7ffff7126425_5140_fd44dc63fa7bdd12ee34fc602231ef02.jpg
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/mjpegdec.c')
| -rw-r--r-- | libavcodec/mjpegdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 063b8fad9c..218377fa16 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -1443,7 +1443,7 @@ static int mjpeg_decode_app(MJpegDecodeContext *s) int len, id, i; len = get_bits(&s->gb, 16); - if (len < 5) + if (len < 6) return AVERROR_INVALIDDATA; if (8 * len > get_bits_left(&s->gb)) return AVERROR_INVALIDDATA; @@ -1557,7 +1557,7 @@ static int mjpeg_decode_app(MJpegDecodeContext *s) } /* EXIF metadata */ - if (s->start_code == APP1 && id == AV_RB32("Exif")) { + if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) { GetByteContext gbytes; int ret, le, ifd_offset, bytes_read; const uint8_t *aligned; |