ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Wed Feb 1 01:32:37 2017 +0100| [3782656631fa8262528c07794acf7e9c2aab000d] | committer: Michael Niedermayer
avcodec/mjpegdec: Check for for the bitstream end in mjpeg_decode_scan_progressive_ac() Fixes timeout Fixes: 496/clusterfuzz-testcase-5805083497332736 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3782656631fa8262528c07794acf7e9c2aab000d --- libavcodec/mjpegdec.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 07988b6..34a988d 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -1397,6 +1397,10 @@ static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int block_idx = mb_y * s->block_stride[c]; int16_t (*block)[64] = &s->blocks[c][block_idx]; uint8_t *last_nnz = &s->last_nnz[c][block_idx]; + if (get_bits_left(&s->gb) <= 0) { + av_log(s->avctx, AV_LOG_ERROR, "bitstream truncated in mjpeg_decode_scan_progressive_ac\n"); + return AVERROR_INVALIDDATA; + } for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) { int ret; if (s->restart_interval && !s->restart_count) _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
