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avcodec/avpacket: clear side_data_elems

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Fixes null pointer dereference

Found-by: 连一汉 <lianyihan@360.cn>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 5e1bf9d8c0d2cdbbf17b06a5dfdf87a635b3203b)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-09-12 13:13:42 +02:00
parent b7b3b0086d
commit 26a8fc1c00
1 changed files with 5 additions and 2 deletions
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7
libavcodec/avpacket.c
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@ -184,6 +184,7 @@ static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup)
{
pkt->data = NULL;
pkt->side_data = NULL;
pkt->side_data_elems = 0;
if (pkt->buf) {
AVBufferRef *ref = av_buffer_ref(src->buf);
if (!ref)
@ -193,9 +194,11 @@ static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup)
} else {
DUP_DATA(pkt->data, src->data, pkt->size, 1, ALLOC_BUF);
}
if (pkt->side_data_elems && dup)
if (src->side_data_elems && dup) {
pkt->side_data = src->side_data;
if (pkt->side_data_elems && !dup) {
pkt->side_data_elems = src->side_data_elems;
}
if (src->side_data_elems && !dup) {
return av_copy_packet_side_data(pkt, src);
}
return 0;