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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-02-01 01:32:37 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-02-08 21:17:51 +0100 |
| commit | 87cc0b0474b1ce4119c42feac5d9d9e5bafb9d97 (patch) | |
| tree | 3c2aa3c9bb75b7abf13cf678946f47be0f77a17e | |
| parent | d59582a567cf1eca7f99b8f7586afdf721ff1e1d (diff) | |
| download | ffmpeg-87cc0b0474b1ce4119c42feac5d9d9e5bafb9d97.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>
(cherry picked from commit 3782656631fa8262528c07794acf7e9c2aab000d)
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 e4fdf0273a..d9d18e2c82 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -1391,6 +1391,10 @@ 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) |