* compat: backport kfree_sensitive and switch to it
* netlink: consistently use NLA_POLICY_EXACT_LEN()
* netlink: consistently use NLA_POLICY_MIN_LEN()
* compat: backport NLA policy macros
Backports from upstream changes.
* peerlookup: take lock before checking hash in replace operation
A fix for a race condition caught by syzkaller.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>