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avcodec/wmaprodec: Check for overread in decode_packet()

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Fixes assertion failure
Fixes: 0256e92df2df7e933b43a2c70e4c8040/signal_sigabrt_7ffff6ae7cc9_1358_999ac18684788221490757582ce9af84.wma

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7ad698e24e)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2015-11-15 18:18:40 +01:00
parent 093e58228e
commit b3bc05290a
1 changed files with 5 additions and 0 deletions
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libavcodec/wmaprodec.c
+5
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@@ -1623,6 +1623,11 @@ static int decode_packet(AVCodecContext *avctx, void *data,
s->packet_done = 1; s->packet_done = 1;
} }
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 && if (s->packet_done && !s->packet_loss &&
remaining_bits(s, gb) > 0) { remaining_bits(s, gb) > 0) {
/** save the rest of the data so that it can be decoded /** save the rest of the data so that it can be decoded