kernel/linux.git/net/ipv6/ipcomp6.c, branch v6.12.80

xfrm: delete x->tunnel as we delete x

2025-12-12T17:37:17+00:00

[ Upstream commit b441cf3f8c4b8576639d20c8eb4aa32917602ecd ] The ipcomp fallback tunnels currently get deleted (from the various lists and hashtables) as the last user state that needed that fallback is destroyed (not deleted). If a reference to that user state still exists, the fallback state will remain on the hashtables/lists, triggering the WARN in xfrm_state_fini. Because of those remaining references, the fix in commit f75a2804da39 ("xfrm: destroy xfrm_state synchronously on net exit path") is not complete. We recently fixed one such situation in TCP due to defered freeing of skbs (commit 9b6412e6979f ("tcp: drop secpath at the same time as we currently drop dst")). This can also happen due to IP reassembly: skbs with a secpath remain on the reassembly queue until netns destruction. If we can't guarantee that the queues are flushed by the time xfrm_state_fini runs, there may still be references to a (user) xfrm_state, preventing the timely deletion of the corresponding fallback state. Instead of chasing each instance of skbs holding a secpath one by one, this patch fixes the issue directly within xfrm, by deleting the fallback state as soon as the last user state depending on it has been deleted. Destruction will still happen when the final reference is dropped. A separate lockdep class for the fallback state is required since we're going to lock x->tunnel while x is locked. Fixes: 9d4139c76905 ("netns xfrm: per-netns xfrm_state_all list") Signed-off-by: Sabrina Dubroca Signed-off-by: Steffen Klassert Signed-off-by: Sasha Levin

xfrm: ipcomp: add extack to ipcomp{4,6}_init_state

2022-09-29T05:18:00+00:00

And the shared helper ipcomp_init_state. Signed-off-by: Sabrina Dubroca Signed-off-by: Steffen Klassert

xfrm: pass extack down to xfrm_type ->init_state

2022-09-29T05:17:58+00:00

Signed-off-by: Sabrina Dubroca Signed-off-by: Steffen Klassert

xfrm: remove hdr_offset indirection

2021-06-11T12:48:50+00:00

After previous patches all remaining users set the function pointer to the same function: xfrm6_find_1stfragopt. So remove this function pointer and call ip6_find_1stfragopt directly. Reduces size of xfrm_type to 64 bytes on 64bit platforms. Signed-off-by: Florian Westphal Signed-off-by: Steffen Klassert

xfrm: remove description from xfrm_type struct

2021-06-09T07:38:52+00:00

Its set but never read. Reduces size of xfrm_type to 64 bytes on 64bit. Signed-off-by: Florian Westphal Signed-off-by: Steffen Klassert

ipcomp: assign if_id to child tunnel from parent tunnel

2020-07-09T10:55:37+00:00

The child tunnel if_id will be used for xfrm interface's lookup when processing the IP(6)IP(6) packets in the next patches. Signed-off-by: Xin Long Signed-off-by: Steffen Klassert

xfrm: add support for UDPv6 encapsulation of ESP

2020-04-28T09:28:36+00:00

This patch adds support for encapsulation of ESP over UDPv6. The code is very similar to the IPv4 encapsulation implementation, and allows to easily add espintcp on IPv6 as a follow-up. Signed-off-by: Sabrina Dubroca Signed-off-by: Steffen Klassert

xfrm: remove type and offload_type map from xfrm_state_afinfo

2019-06-06T06:34:50+00:00

Only a handful of xfrm_types exist, no need to have 512 pointers for them. Reduces size of afinfo struct from 4k to 120 bytes on 64bit platforms. Also, the unregister function doesn't need to return an error, no single caller does anything useful with it. Just place a WARN_ON() where needed instead. Signed-off-by: Florian Westphal Signed-off-by: Steffen Klassert

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13

2019-05-21T09:28:45+00:00

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details [based] [from] [clk] [highbank] [c] you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 355 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Kate Stewart Reviewed-by: Jilayne Lovejoy Reviewed-by: Steve Winslow Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154041.837383322@linutronix.de Signed-off-by: Greg Kroah-Hartman

net: inet: Support UID-based routing in IP protocols.

2016-11-04T18:45:23+00:00

- Use the UID in routing lookups made by protocol connect() and sendmsg() functions. - Make sure that routing lookups triggered by incoming packets (e.g., Path MTU discovery) take the UID of the socket into account. - For packets not associated with a userspace socket, (e.g., ping replies) use UID 0 inside the user namespace corresponding to the network namespace the socket belongs to. This allows all namespaces to apply routing and iptables rules to kernel-originated traffic in that namespaces by matching UID 0. This is better than using the UID of the kernel socket that is sending the traffic, because the UID of kernel sockets created at namespace creation time (e.g., the per-processor ICMP and TCP sockets) is the UID of the user that created the socket, which might not be mapped in the namespace. Tested: compiles allnoconfig, allyesconfig, allmodconfig Tested: https://android-review.googlesource.com/253302 Signed-off-by: Lorenzo Colitti Signed-off-by: David S. Miller