| Message ID | 20190521002210.932-1-michael@niedermayer.cc |
|---|---|
| State | Accepted |
| Commit | 8e520843dd76a644c019134ac7b17eba9f1118b3 |
| Headers | show |
On Tue, May 21, 2019 at 02:22:10AM +0200, Michael Niedermayer wrote: > 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 <michael@niedermayer.cc> > --- > libavcodec/dxv.c | 3 +++ > 1 file changed, 3 insertions(+) will apply [...]
diff --git a/libavcodec/dxv.c b/libavcodec/dxv.c index 6fe5516505..5fd1844094 100644 --- a/libavcodec/dxv.c +++ b/libavcodec/dxv.c @@ -745,6 +745,9 @@ 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)
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 <michael@niedermayer.cc> --- libavcodec/dxv.c | 3 +++ 1 file changed, 3 insertions(+)