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lavc/avpacket: Fix undefined behaviour, do not pass a null pointer to memcpy().

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Fixes ticket #5857.
This commit is contained in:
Carl Eugen Hoyos 2016-09-22 01:03:55 +02:00
parent 7447ec91b5
commit c54eef46f9
1 changed files with 2 additions and 1 deletions
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3
libavcodec/avpacket.c
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@ -139,7 +139,8 @@ int av_grow_packet(AVPacket *pkt, int grow_by)
pkt->buf = av_buffer_alloc(new_size); pkt->buf = av_buffer_alloc(new_size);
if (!pkt->buf) if (!pkt->buf)
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
memcpy(pkt->buf->data, pkt->data, pkt->size); if (pkt->size > 0)
memcpy(pkt->buf->data, pkt->data, pkt->size);
pkt->data = pkt->buf->data; pkt->data = pkt->buf->data;
} }
pkt->size += grow_by; pkt->size += grow_by;