Merge branch 'icmp-fix-icmp-error-source-address-over-xfrm-tunnel'

Antony Antony says:

====================
icmp: Fix icmp error source address over xfrm tunnel

icmp: Fix icmp error source address over xfrm tunnel

This fix, originally sent to XFRM/IPsec, has been recommended by
Steffen Klassert to submit to the net tree, since it changes ICMP
behavior.

The patch addresses a minor issue related to the IPv4 source address
of ICMP error messages. The bug only occurs when xfrm policies are
configured. It originated from an old 2011 commit:

commit 415b3334a21a ("icmp: Fix regression in nexthop resolution during
replies.")
====================

Link: https://patch.msgid.link/cover.1772101380.git.antony.antony@secunet.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>