[{"id":3677562,"web_url":"http://patchwork.ozlabs.org/comment/3677562/","msgid":"<288c8365-4348-4690-ad71-7c57af8b20c1@canonical.com>","list_archive_url":null,"date":"2026-04-15T09:42:35","subject":"ACK: [REGRESSION][N][PATCH 0/1] Fix Upstream stable v6.6.122,\n v6.12.67, v6.12.68","submitter":{"id":2898,"url":"http://patchwork.ozlabs.org/api/people/2898/","name":"Stefan Bader","email":"stefan.bader@canonical.com"},"content":"On 15/04/2026 11:40, Mehmet Basaran wrote:\n> == Justification ==\n> \n> Impact:\n> The upstream stable v6.6.122, v6.12.67, v6.12.68 update included a\n> change to __ip6_tnl_rcv() which does not work for kernels <v6.13\n> (this might be important if the following is ever picked):\n> \n> f842901be344 \"ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()\"\n> \n> Above patch replaces pskb_inet_may_pull() with skb_vlan_inet_prepare().\n> The problem is that around v6.13 there was\n> \n> \"net: tunnel: make skb_vlan_inet_prepare() return drop reasons\"\n> \n> which changes return values of skb_vlan_inet_prepare(). Before a non\n> zero return code meant success while after it is the opposite.\n> \n> Fix:\n> Instead of pulling another dependency the proposed fix changes usage to\n> other callers of skb_vlan_inet_prepare() in v6.8\n> (bareudp.c/geneve.c/vxlan_core.c).\n> \n> Testcase:\n> Running the ubuntu_kselftests_net:net:l2_tos_ttl_inherit.sh fail (timeout)\n> without the fix. After applying the test passes again.\n> \n> Mehmet Basaran (1):\n>    UBUNTU: SAUCE: Fix skb_vlan_inet_prepare() usage\n> \n>   net/ipv6/ip6_tunnel.c | 2 +-\n>   1 file changed, 1 insertion(+), 1 deletion(-)\n> \n\nI remember that from Jammy.\n\n\nAcked-by: Stefan Bader <stefan.bader@canonical.com>","headers":{"Return-Path":"<kernel-team-bounces@lists.ubuntu.com>","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=IC5KDgVy;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fwbmV1ftbz1yHM\n\tfor <incoming@patchwork.ozlabs.org>; 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boundary=\"===============4145124353232920532==\"","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>"}},{"id":3677570,"web_url":"http://patchwork.ozlabs.org/comment/3677570/","msgid":"<a6107b55-481e-4b3d-8ca5-348adc1b1cfd@canonical.com>","list_archive_url":null,"date":"2026-04-15T09:58:26","subject":"ACK: [REGRESSION][N][PATCH 0/1] Fix Upstream stable v6.6.122,\n v6.12.67, v6.12.68","submitter":{"id":90485,"url":"http://patchwork.ozlabs.org/api/people/90485/","name":"Edoardo Canepa","email":"edoardo.canepa@canonical.com"},"content":"Acked-by: Edoardo Canepa <edoardo.canepa@canonical.com>\n\nOn 4/15/26 11:40, Mehmet Basaran wrote:\n> == Justification ==\n>\n> Impact:\n> The upstream stable v6.6.122, v6.12.67, v6.12.68 update included a\n> change to __ip6_tnl_rcv() which does not work for kernels <v6.13\n> (this might be important if the following is ever picked):\n>\n> f842901be344 \"ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()\"\n>\n> Above patch replaces pskb_inet_may_pull() with skb_vlan_inet_prepare().\n> The problem is that around v6.13 there was\n>\n> \"net: tunnel: make skb_vlan_inet_prepare() return drop reasons\"\n>\n> which changes return values of skb_vlan_inet_prepare(). Before a non\n> zero return code meant success while after it is the opposite.\n>\n> Fix:\n> Instead of pulling another dependency the proposed fix changes usage to\n> other callers of skb_vlan_inet_prepare() in v6.8\n> (bareudp.c/geneve.c/vxlan_core.c).\n>\n> Testcase:\n> Running the ubuntu_kselftests_net:net:l2_tos_ttl_inherit.sh fail (timeout)\n> without the fix. After applying the test passes again.\n>\n> Mehmet Basaran (1):\n>    UBUNTU: SAUCE: Fix skb_vlan_inet_prepare() usage\n>\n>   net/ipv6/ip6_tunnel.c | 2 +-\n>   1 file changed, 1 insertion(+), 1 deletion(-)\n>","headers":{"Return-Path":"<kernel-team-bounces@lists.ubuntu.com>","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=r8rxiOa6;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fwc6S2jl1z1yHM\n\tfor <incoming@patchwork.ozlabs.org>; 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boundary=\"===============2838594999673052539==\"","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>"}},{"id":3677573,"web_url":"http://patchwork.ozlabs.org/comment/3677573/","msgid":"<20260415100329.mykjpfclouxmwabn@wintermute.fritz.box>","list_archive_url":null,"date":"2026-04-15T10:03:29","subject":"ACK/Cmnt: [REGRESSION][N][PATCH 0/1] Fix Upstream stable v6.6.122,\n v6.12.67, v6.12.68","submitter":{"id":86131,"url":"http://patchwork.ozlabs.org/api/people/86131/","name":"Manuel Diewald","email":"manuel.diewald@canonical.com"},"content":"On Wed, Apr 15, 2026 at 12:40:13PM +0300, Mehmet Basaran wrote:\n> == Justification ==\n> \n> Impact:\n> The upstream stable v6.6.122, v6.12.67, v6.12.68 update included a \n> change to __ip6_tnl_rcv() which does not work for kernels <v6.13 \n> (this might be important if the following is ever picked):\n> \n> f842901be344 \"ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()\"\n> \n> Above patch replaces pskb_inet_may_pull() with skb_vlan_inet_prepare().\n> The problem is that around v6.13 there was\n> \n> \"net: tunnel: make skb_vlan_inet_prepare() return drop reasons\"\n> \n> which changes return values of skb_vlan_inet_prepare(). Before a non\n> zero return code meant success while after it is the opposite.\n> \n> Fix:\n> Instead of pulling another dependency the proposed fix changes usage to\n> other callers of skb_vlan_inet_prepare() in v6.8 \n> (bareudp.c/geneve.c/vxlan_core.c).\n> \n> Testcase:\n> Running the ubuntu_kselftests_net:net:l2_tos_ttl_inherit.sh fail (timeout)\n> without the fix. After applying the test passes again.\n> \n> Mehmet Basaran (1):\n>   UBUNTU: SAUCE: Fix skb_vlan_inet_prepare() usage\n> \n>  net/ipv6/ip6_tunnel.c | 2 +-\n>  1 file changed, 1 insertion(+), 1 deletion(-)\n> \n> -- \n> 2.43.0\n> \n> \n> -- \n> kernel-team mailing list\n> kernel-team@lists.ubuntu.com\n> https://lists.ubuntu.com/mailman/listinfo/kernel-team\n\nI think we should probably submit this to upstream, too.\n\nAcked-by: Manuel Diewald <manuel.diewald@canonical.com>","headers":{"Return-Path":"<kernel-team-bounces@lists.ubuntu.com>","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=DbXF+YHq;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; 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boundary=\"===============3071083605779904547==\"","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>"}},{"id":3677578,"web_url":"http://patchwork.ozlabs.org/comment/3677578/","msgid":"<81502117-791e-4ec5-9f83-8626e0cc42eb@canonical.com>","list_archive_url":null,"date":"2026-04-15T10:14:35","subject":"Re: ACK/Cmnt: [REGRESSION][N][PATCH 0/1] Fix Upstream stable\n v6.6.122, v6.12.67, v6.12.68","submitter":{"id":2898,"url":"http://patchwork.ozlabs.org/api/people/2898/","name":"Stefan Bader","email":"stefan.bader@canonical.com"},"content":"On 15/04/2026 12:03, Manuel Diewald wrote:\n> On Wed, Apr 15, 2026 at 12:40:13PM +0300, Mehmet Basaran wrote:\n>> == Justification ==\n>>\n>> Impact:\n>> The upstream stable v6.6.122, v6.12.67, v6.12.68 update included a\n>> change to __ip6_tnl_rcv() which does not work for kernels <v6.13\n>> (this might be important if the following is ever picked):\n>>\n>> f842901be344 \"ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()\"\n>>\n>> Above patch replaces pskb_inet_may_pull() with skb_vlan_inet_prepare().\n>> The problem is that around v6.13 there was\n>>\n>> \"net: tunnel: make skb_vlan_inet_prepare() return drop reasons\"\n>>\n>> which changes return values of skb_vlan_inet_prepare(). Before a non\n>> zero return code meant success while after it is the opposite.\n>>\n>> Fix:\n>> Instead of pulling another dependency the proposed fix changes usage to\n>> other callers of skb_vlan_inet_prepare() in v6.8\n>> (bareudp.c/geneve.c/vxlan_core.c).\n>>\n>> Testcase:\n>> Running the ubuntu_kselftests_net:net:l2_tos_ttl_inherit.sh fail (timeout)\n>> without the fix. After applying the test passes again.\n>>\n>> Mehmet Basaran (1):\n>>    UBUNTU: SAUCE: Fix skb_vlan_inet_prepare() usage\n>>\n>>   net/ipv6/ip6_tunnel.c | 2 +-\n>>   1 file changed, 1 insertion(+), 1 deletion(-)\n>>\n>> -- \n>> 2.43.0\n>>\n>>\n>> -- \n>> kernel-team mailing list\n>> kernel-team@lists.ubuntu.com\n>> https://lists.ubuntu.com/mailman/listinfo/kernel-team\n> \n> I think we should probably submit this to upstream, too.\n\nI did send it for 5.15 (with no reaction). For Noble it depends whether \nthe patch came from before 6.13 or not. Because around then the function \nchanged to return an int.\n\n-Stefan\n\n> \n> Acked-by: Manuel Diewald <manuel.diewald@canonical.com>\n> \n>","headers":{"Return-Path":"<kernel-team-bounces@lists.ubuntu.com>","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=QmSSOvL7;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fwcTH61qDz1yHM\n\tfor <incoming@patchwork.ozlabs.org>; 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boundary=\"===============1867717656351559467==\"","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>"}},{"id":3677609,"web_url":"http://patchwork.ozlabs.org/comment/3677609/","msgid":"<20260415113354.7u25vjevn4zss26u@wintermute.fritz.box>","list_archive_url":null,"date":"2026-04-15T11:33:54","subject":"Re: ACK/Cmnt: [REGRESSION][N][PATCH 0/1] Fix Upstream stable\n v6.6.122, v6.12.67, v6.12.68","submitter":{"id":86131,"url":"http://patchwork.ozlabs.org/api/people/86131/","name":"Manuel Diewald","email":"manuel.diewald@canonical.com"},"content":"On Wed, Apr 15, 2026 at 12:14:35PM +0200, Stefan Bader wrote:\n> I did send it for 5.15 (with no reaction). For Noble it depends whether the\n> patch came from before 6.13 or not. Because around then the function changed\n> to return an int.\n\nI haven't checked from which branch that patch reached noble but it\nmust've been either 6.6.y or 6.12.y since that is what we're currently\npicking from for noble.","headers":{"Return-Path":"<kernel-team-bounces@lists.ubuntu.com>","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=Oy7tW+eq;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fwfDb1QSnz1yDF\n\tfor <incoming@patchwork.ozlabs.org>; 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