Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:  tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()  Sashiko found that iptunnel_pmtud_build_icmp() and iptunnel_pmtud_build_icmpv6() were caching ip_hdr() and ipv6_hdr() before an skb_cow() call which can reallocate skb->head.  Fix this possible UAF by initializing the local variables after the skb_cow() call.  Remove skb_reset_network_header() calls which were not needed.