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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-16 23:09:04 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-31 19:51:57 +0100 |
| commit | 067b2c0c289c655f090361c96cdbab183030ed9d (patch) | |
| tree | e4e65f2d92e5071669afdbb05ddb8b7fc4b37fe5 | |
| parent | 8681622d7be384c73024f230e8c56d6d9a0a60bd (diff) | |
| download | ffmpeg-067b2c0c289c655f090361c96cdbab183030ed9d.tar.gz | |
avcodec/agm: Include block size in the MV check for flags == 3
Fixes: out of array read
Fixes: 19331/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5644115983466496
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 1f2096945709a32315da740691b5716da55893c3)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/agm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/agm.c b/libavcodec/agm.c index 628f324913..80f4697ee5 100644 --- a/libavcodec/agm.c +++ b/libavcodec/agm.c @@ -423,8 +423,8 @@ static int decode_inter_plane(AGMContext *s, GetBitContext *gb, int size, int map = s->map[x]; if (orig_mv_x >= -32) { - if (y * 8 + mv_y < 0 || y * 8 + mv_y >= h || - x * 8 + mv_x < 0 || x * 8 + mv_x >= w) + if (y * 8 + mv_y < 0 || y * 8 + mv_y + 8 >= h || + x * 8 + mv_x < 0 || x * 8 + mv_x + 8 >= w) return AVERROR_INVALIDDATA; copy_block8(frame->data[plane] + (s->blocks_h - 1 - y) * 8 * frame->linesize[plane] + x * 8, |