The branch, master has been updated via d8ffec5bf9a2803f55cc0822a97b7815f24bee83 (commit) from d03483bd265b68db00c9b90f6f48dcf61c5c300d (commit) - Log ----------------------------------------------------------------- commit d8ffec5bf9a2803f55cc0822a97b7815f24bee83 Author: Michael Niedermayer <michael@niedermayer.cc> AuthorDate: Wed Aug 6 12:49:49 2025 +0200 Commit: Michael Niedermayer <michael@niedermayer.cc> CommitDate: Thu Oct 30 02:08:14 2025 +0100 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> diff --git a/libavcodec/vlc.c b/libavcodec/vlc.c index 260b2052be..93d88714f2 100644 --- a/libavcodec/vlc.c +++ b/libavcodec/vlc.c @@ -527,7 +527,7 @@ int ff_vlc_init_multi_from_lengths(VLC *vlc, VLC_MULTI *multi, int nb_bits, int if (ret < 0) return ret; - multi->table = av_malloc(sizeof(*multi->table) << nb_bits); + multi->table = av_mallocz(sizeof(*multi->table) << nb_bits); if (!multi->table) goto fail; ----------------------------------------------------------------------- Summary of changes: libavcodec/vlc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) hooks/post-receive --