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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-05-11 21:08:17 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-05-12 21:39:13 +0200 |
| commit | 4d701e92223d046a9d52c3ae16897e492f045478 (patch) | |
| tree | 635f4367b43d66ca524346cccbc87c345abedfba /libavcodec/cdtoons.c | |
| parent | 19738b1bc2e2700d9f589fb9d1d1d10e2bbf3d5e (diff) | |
| download | ffmpeg-4d701e92223d046a9d52c3ae16897e492f045478.tar.gz | |
avcodec/cdtoons: Check sprite_offset is within the packet
Fixes: out of array read
Fixes: 20659/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CDTOONS_fuzzer-5754518731227136
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/cdtoons.c')
| -rw-r--r-- | libavcodec/cdtoons.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/cdtoons.c b/libavcodec/cdtoons.c index 13f9a60f0f..a8609815c1 100644 --- a/libavcodec/cdtoons.c +++ b/libavcodec/cdtoons.c @@ -190,6 +190,9 @@ static int cdtoons_decode_frame(AVCodecContext *avctx, void *data, palette_set = bytestream_get_byte(&buf); buf += 5; + if (sprite_offset > buf_size) + return AVERROR_INVALIDDATA; + /* read new sprites introduced in this frame */ buf = avpkt->data + sprite_offset; while (sprite_count--) { |