[NETFILTER]: Fix multiple bugs in dst match
This patch fixes the following bugs in ip6t_dst.c. - ".me = THIS_MODULE" is missing - The cast of the pointer to the next IPv6 extension header is wrong. - hdrlen may underflow. - (u16)*optdesc causes to alignment problem. - The calculation of the offset to next option is wrong. In the case that the type isn't 0, it should be "Opt Data Len" field + 2 (see RFC2460). Signed-off-by: Yasuyuki KOZAKAI <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net>
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