Hi! Attached patch fixes ticket #5857.
Please comment, Carl Eugen
From 20e673f5303fef7b0adc7737d2023bebfe18014f Mon Sep 17 00:00:00 2001 From: Carl Eugen Hoyos <ceho...@ag.or.at> Date: Thu, 22 Sep 2016 01:03:55 +0200 Subject: [PATCH] lavc/avpacket: Fix undefined behaviour, do not pass a null pointer to memcpy(). Fixes ticket #5857. --- libavcodec/avpacket.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c index a485064..c3f871c 100644 --- a/libavcodec/avpacket.c +++ b/libavcodec/avpacket.c @@ -139,7 +139,8 @@ int av_grow_packet(AVPacket *pkt, int grow_by) pkt->buf = av_buffer_alloc(new_size); if (!pkt->buf) 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->size += grow_by; -- 1.7.10.4
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