From: Luca Barbato Date: Mon, 17 Apr 2017 14:10:52 +0000 (+0000) Subject: flv: Validate the packet size X-Git-Tag: n4.0~61^2~461 X-Git-Url: http://git.videolan.org/?p=ffmpeg.git;a=commitdiff_plain;h=279e3aaa14daba6b7a37d75f3fb6e29c732d123f flv: Validate the packet size Size can be negative at that point. Bug-Id: 1041 CC: libav-stable@libav.org --- diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c index 693c859ebf..1b29740f41 100644 --- a/libavformat/flvdec.c +++ b/libavformat/flvdec.c @@ -912,6 +912,12 @@ skip: st->codecpar->codec_id == AV_CODEC_ID_H264) { int type = avio_r8(s->pb); size--; + + if (size < 0) { + ret = AVERROR_INVALIDDATA; + goto leave; + } + if (st->codecpar->codec_id == AV_CODEC_ID_H264) { // sign extension int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;