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authorMichael Niedermayer <michael@niedermayer.cc>2019-10-31 15:00:32 +0100
committerMichael Niedermayer <michael@niedermayer.cc>2019-12-06 20:30:58 +0100
commit40872346be2e429efd860c30e194e52c70e3a552 (patch)
tree79b8182fd31f101e994113ce27851f23ac4c0c6f /libavcodec/arm/audiodsp_arm.h
parent0e40a839bb7894f8b76eb293fff75c777534c0b3 (diff)
downloadffmpeg-40872346be2e429efd860c30e194e52c70e3a552.tar.gz
avcodec/vc1_block: Fix undefined behavior in ac prediction rescaling
The intermediates are required to fit in 12bit (8.1.3.9 Coefficient Scaling) See SMPTE 421M-2006 and Amendment 1-2007 Fixes: signed integer overflow: -20691 * 262144 cannot be represented in type 'int' Fixes: 18479/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VC1_fuzzer-5128912371187712 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 7fc1baf0ca83ef06014878290339a59735603959) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/arm/audiodsp_arm.h')
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