From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 3/3] avformat/mxg: clear AV_INPUT_BUFFER_PADDING_SIZE
Date: Thu, 24 Jul 2025 18:40:19 +0200
Message-ID: <20250724164019.773541-3-michael@niedermayer.cc> (raw)
In-Reply-To: <20250724164019.773541-1-michael@niedermayer.cc>
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>
---
libavformat/mxg.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavformat/mxg.c b/libavformat/mxg.c
index 6a39873f213..40139d7d3d9 100644
--- a/libavformat/mxg.c
+++ b/libavformat/mxg.c
@@ -127,6 +127,8 @@ 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;
}
--
2.50.1
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prev parent reply other threads:[~2025-07-24 16:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-24 16:40 [FFmpeg-devel] [PATCH 1/3] avcodec/shorten: Clear the additionally allocated space on realloc Michael Niedermayer
2025-07-24 16:40 ` [FFmpeg-devel] [PATCH 2/3] avcodec/dxvenc: Clear width to linesize not linesize to linesize Michael Niedermayer
2025-07-24 16:40 ` Michael Niedermayer [this message]
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