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avformat/mxg: clear AV_INPUT_BUFFER_PADDING_SIZE

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Fixes: use of uninitialized memory
Fixes: 427532813/clusterfuzz-testcase-minimized-ffmpeg_dem_MXG_fuzzer-5661938917113856

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 1b12e919cf)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2025-07-24 01:05:40 +02:00
parent b128f50eef
commit cfcafeba23
1 changed files with 2 additions and 0 deletions
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libavformat/mxg.c
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@@ -126,6 +126,8 @@ static int mxg_update_cache(AVFormatContext *s, unsigned int cache_size)
mxg->cache_size += ret;
memset(mxg->buffer_ptr + mxg->cache_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
return ret;
}