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avformat/jvdec: clear packet padding after downsize

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Fixes: use of uninitialized memeory
Fixes: msan_uninit-mem_7fbf26b5fefe_5981_intro.jv
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2014-01-15 23:06:30 +01:00
parent 1a01dc8343
commit b948ab8132
1 changed files with 1 additions and 0 deletions
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libavformat/jvdec.c
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@@ -190,6 +190,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
pkt->data[4] = jvf->video_type; pkt->data[4] = jvf->video_type;
if ((size = avio_read(pb, pkt->data + JV_PREAMBLE_SIZE, size)) < 0) if ((size = avio_read(pb, pkt->data + JV_PREAMBLE_SIZE, size)) < 0)
return AVERROR(EIO); return AVERROR(EIO);
memset(pkt->data + JV_PREAMBLE_SIZE + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
pkt->size = size + JV_PREAMBLE_SIZE; pkt->size = size + JV_PREAMBLE_SIZE;
pkt->stream_index = 1; pkt->stream_index = 1;