avcodec/mpeg4videodec: Check bps (VOL header) before VOP for studio profile
authorMichael Niedermayer <michael@niedermayer.cc>
Sun, 29 Apr 2018 18:28:46 +0000 (20:28 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Thu, 17 May 2018 00:23:06 +0000 (02:23 +0200)
commitb3a18511cc93082ebecce0861bc15d7f548492e0
treed95053e607f5a5b64ce9c3dac7730c51fdc6864d
parent9e5d0860c043ba5d1e48c0f8c42b0fe3b6cbeba4
avcodec/mpeg4videodec: Check bps (VOL header) before VOP for studio profile

Fixes: runtime error: shift exponent -1 is negative
Fixes: 7486/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-4977380939530240

Fixes: runtime error: index 36 out of bounds for type 'const uint8_t [32]'
Fixes: 7566/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-6536620682510336

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/mpeg4videodec.c