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avformat/siff: check avio_read() return value before returning packet

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Fixes: /ld/michael/ffmpeg_uninit/ffmpeg_uninit/done/msan_uninit-mem_7fb3e0fa86e9_1980_INTRO_B.VB
Fixes use of uninitialized memory
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-12-29 13:20:03 +01:00
parent f4c62b9f64
commit 8a0d446ad6
1 changed files with 4 additions and 1 deletions
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5
libavformat/siff.c
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@ -216,7 +216,10 @@ static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
AV_WL16(pkt->data, c->flags);
if (c->gmcsize)
memcpy(pkt->data + 2, c->gmc, c->gmcsize);
avio_read(s->pb, pkt->data + 2 + c->gmcsize, size);
if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
av_free_packet(pkt);
return AVERROR_INVALIDDATA;
}
pkt->stream_index = 0;
c->curstrm = -1;
}else{