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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-02-01 01:32:37 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-02-01 01:36:50 +0100 |
| commit | 3782656631fa8262528c07794acf7e9c2aab000d (patch) | |
| tree | 3cde4972234f3f1102db5b38beaf1e063701eaa8 | |
| parent | 8bdba1092f50d52e0af90f425811302ec91152f8 (diff) | |
| download | ffmpeg-3782656631fa8262528c07794acf7e9c2aab000d.tar.gz | |
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 <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mjpegdec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 07988b68b1..34a988dd94 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) |