From: Reimar Döffinger Date: Sun, 31 May 2009 17:44:35 +0000 (+0000) Subject: lcldec: ensure that the offset for av_memcpy_backptr is valid. X-Git-Tag: v0.6~4187 X-Git-Url: https://git.videolan.org/?p=ffmpeg.git;a=commitdiff_plain;h=a7bfbe4e130779e1aefe59abbc1d93944d43bd4e;ds=inline lcldec: ensure that the offset for av_memcpy_backptr is valid. Originally committed as revision 19067 to svn://svn.ffmpeg.org/ffmpeg/trunk --- diff --git a/libavcodec/lcldec.c b/libavcodec/lcldec.c index 53637f2507..bc7e11d267 100644 --- a/libavcodec/lcldec.c +++ b/libavcodec/lcldec.c @@ -93,6 +93,7 @@ static unsigned int mszh_decomp(const unsigned char * srcptr, int srclen, unsign unsigned ofs = bytestream_get_le16(&srcptr); unsigned cnt = (ofs >> 11) + 1; ofs &= 0x7ff; + ofs = FFMIN(ofs, destptr - destptr_bak); cnt *= 4; cnt = FFMIN(cnt, destptr_end - destptr); av_memcpy_backptr(destptr, ofs, cnt);