diff options
| author | Michael Niedermayer <[email protected]> | 2019-05-21 01:33:03 +0200 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2019-11-11 20:18:45 +0100 |
| commit | 08c9711d91f2e266d5f32f80a4973bf2f660b3d5 (patch) | |
| tree | d9bf93f33061d2aae6e98e104664b6bace153f06 | |
| parent | da7dd1740158fa1ed4b8d9a82712af14a8844b41 (diff) | |
avcodec/dxv: Check op_offset in dxv_decompress_cocg()
Fixes: signed integer overflow: -2147483648 - 12 cannot be represented in type 'int'
Fixes: 14732/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DXV_fuzzer-5735273129836544
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit 8e520843dd76a644c019134ac7b17eba9f1118b3)
Signed-off-by: Michael Niedermayer <[email protected]>
| -rw-r--r-- | libavcodec/dxv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/dxv.c b/libavcodec/dxv.c index aef5ec19dd..7ae3315493 100644 --- a/libavcodec/dxv.c +++ b/libavcodec/dxv.c @@ -743,6 +743,9 @@ static int dxv_decompress_cocg(DXVContext *ctx, GetByteContext *gb, int skip0, skip1, oi0 = 0, oi1 = 0; int ret, state0 = 0, state1 = 0; + if (op_offset < 12) + return AVERROR_INVALIDDATA; + dst = tex_data; bytestream2_skip(gb, op_offset - 12); if (op_size0 > max_op_size0) |