Michael Niedermayer d8ffec5bf9 avcodec/vlc: Clear val8/16 in vlc_multi_gen() by av_mallocz() ...

Fixes: use of uninitialized memory
Fixes: 427814450/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MAGICYUV_DEC_fuzzer-646512196065689
Fixes: 445961558/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_UTVIDEO_DEC_fuzzer-5515158672965632

the multi vlc code will otherwise return uninitialized data. Now one can argue that this data should
not be used, but on errors this data can remain ...

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

2025-10-30 02:08:14 +01:00

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