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avcodec/shorten: clear padding

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Fixes: use-of-uninitialized-value
Fixes: 70854/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-5533480570650624

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 e44349ee88)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2024-08-04 22:10:48 +02:00
parent c9a2d48c2e
commit a3431f279e
1 changed files with 1 additions and 0 deletions
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libavcodec/shorten.c
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@@ -558,6 +558,7 @@ static int shorten_decode_frame(AVCodecContext *avctx, void *data,
buf = &s->bitstream[s->bitstream_index];
buf_size += s->bitstream_size;
s->bitstream_size = buf_size;
memset(buf + buf_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
/* do not decode until buffer has at least max_framesize bytes or
* the end of the file has been reached */