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avformat/img2dec: Clear padding data after EOF

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Fixes: use-of-uninitialized-value
Fixes: 70852/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5179190066872320

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Kacper Michajlow <kasper93@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3978e81809)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-08-04 22:00:35 +02:00
parent aaaf20a11f
commit 13ca705eeb
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libavformat/img2dec.c
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@ -563,6 +563,7 @@ int ff_img_read_packet(AVFormatContext *s1, AVPacket *pkt)
}
goto fail;
} else {
memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
s->img_count++;
s->img_number++;
s->pts++;