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Sabrina Dubroca says: ==================== net: ipv4: fixes for PMTU when link MTU changes The first patch adapts the changes that commite9fa1495d7("ipv6: Reflect MTU changes on PMTU of exceptions for MTU-less routes") did in IPv6 to IPv4: lower PMTU when the first hop's MTU drops below it, and raise PMTU when the first hop was limiting PMTU discovery and its MTU is increased. The second patch fixes bugs introduced in commitd52e5a7e7c("ipv4: lock mtu in fnhe when received PMTU < net.ipv4.route.min_pmtu") that only appear once the first patch is applied. Selftests for these cases were introduced in net-next commite44e428f59("selftests: pmtu: add basic IPv4 and IPv6 PMTU tests") v2: add cover letter, and fix a few small things in patch 1 ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
============
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