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libavcodec/wmalosslessdec: Check the remaining bits

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Fixes assertion failure
Fixes: 24ebfda03228b5cc1ef792608cfba458/signal_sigabrt_7ffff6ae7c37_6473_3fa8a111dbc752b1a7c411c5ab79aaa4.wma

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-08-21 20:30:34 +02:00
parent b7d1f44ce0
commit 67318187fb
1 changed files with 5 additions and 0 deletions
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5
libavcodec/wmalosslessdec.c
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@ -1271,6 +1271,11 @@ static int decode_packet(AVCodecContext *avctx, void *data, int *got_frame_ptr,
}
}
if (remaining_bits(s, gb) < 0) {
av_log(avctx, AV_LOG_ERROR, "Overread %d\n", -remaining_bits(s, gb));
s->packet_loss = 1;
}
if (s->packet_done && !s->packet_loss &&
remaining_bits(s, gb) > 0) {
/* save the rest of the data so that it can be decoded