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avformat/bit: check that pkt->size is 10 in write_packet 

Ohter packet sizes are not supported by this muxer.

This avoids a null pointer dereference of pkt->data.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit eeda2c3de8)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Andreas Cadhalpun 2015-02-26 21:38:50 +01:00 committed by Michael Niedermayer
parent f92e8cccf5
commit 6739df26a6
1 changed files with 3 additions and 0 deletions
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3
libavformat/bit.c
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@ -132,6 +132,9 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
GetBitContext gb;
int i;
if (pkt->size != 10)
return AVERROR(EINVAL);
avio_wl16(pb, SYNC_WORD);
avio_wl16(pb, 8 * 10);