Description: ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()
References:
Notes:
 carnil> Introduced in 0d3c703a9d17 ("ipv6: Cleanup IPv6 tunnel receive path").
 carnil> Vulnerable versions: 4.7-rc1.
Bugs:
upstream: released (6.8-rc3) [8d975c15c0cd744000ca386247432d57b21f9df0]
6.7-upstream-stable: released (6.7.4) [c835df3bcc14858ae9b27315dd7de76370b94f3a]
6.6-upstream-stable: released (6.6.16) [350a6640fac4b53564ec20aa3f4a0922cb0ba5e6]
6.1-upstream-stable: released (6.1.77) [d54e4da98bbfa8c257bdca94c49652d81d18a4d8]
5.10-upstream-stable: released (5.10.210) [a9bc32879a08f23cdb80a48c738017e39aea1080]
4.19-upstream-stable: needed
sid: released (6.7.7-1)
6.1-bookworm-security: released (6.1.82-1)
5.10-bullseye-security: needed
4.19-buster-security: needed