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emacs 29.4 From: Petr Machata To: Jakub Kicinski CC: Petr Machata , "David S. Miller" , Eric Dumazet , Paolo Abeni , "David Ahern" , , Simon Horman , Nikolay Aleksandrov , Ido Schimmel , , Kuniyuki Iwashima Subject: Re: [PATCH net-next 00/14] ipmr, ip6mr: Allow MC-routing locally-generated MC packets Date: Thu, 12 Jun 2025 14:02:47 +0200 In-Reply-To: <20250611132320.53c5bebc@kernel.org> Message-ID: <87jz5hhqqe.fsf@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-ClientProxiedBy: rnnvmail202.nvidia.com (10.129.68.7) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MN1PEPF0000ECD7:EE_|MN0PR12MB6103:EE_ X-MS-Office365-Filtering-Correlation-Id: ceaa7b7c-3a78-4a51-16a4-08dda9cdc97d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?hK1vnhdumzS89xvWOdVwtWIxiEXZiAF0GkMEIeDegjPhnx5PN9KXuQRTr35p?= =?us-ascii?Q?pZP+PGPgzddlIIchw50Hzggndfa3fgEv3fYQRkGGGGzwuQmrVbi7hmImPn8l?= =?us-ascii?Q?6HpqIRJI1cJrhN1CTKc+yFUSHk/D6YXZDM1UKUuJ5IfLDsvSvGObxTGdmIpQ?= =?us-ascii?Q?suafE5AXjoTLbRg91O9dxObwEpfFWz68Hi/U3tQenfToREM5lU1truPPqiH/?= =?us-ascii?Q?DudaHNGi017a81wUMeH1NWSu3B1UEK75+48KAZFrNAuBb24/j6kmFYKlXY1T?= =?us-ascii?Q?kZT/rrxylnYzoHdcusicLUPf7riK9upgGU/RxdAjMuULm1LCdozPFsDdAfHM?= =?us-ascii?Q?cU6gMevsdBbRKgDu7FqjplFDN2WoodXjPVzyQUGpEcp91hdkdTZTemW6BMru?= =?us-ascii?Q?RpCnO70f96DVwl68iO4+L3cZWCGEiwsSVYcMwEssbcmiU/n/bGMwUDdOogfO?= =?us-ascii?Q?azZiF7YEqAWDegHnnmdFcrbin9YYIPRUNXOe4q/BtBdW0zYeCkn6bWUYEdYL?= =?us-ascii?Q?9nIuBymrYhEaNvoRe9PsLdk4JlxPuSO8kDUURu5Wp4h8+ZCSff4yEz5GMsjt?= =?us-ascii?Q?ptL+RpzZQuIfWYMvEpXk4mqF7vYB3qCUDfytYHCrJbVKAmolR/2gG0zhW1u3?= =?us-ascii?Q?6vMxJlT1ukLjbk29I0jRxveqNSrNa/50Ppi5MdLgf6BrOhEna0mtigrGWYzg?= =?us-ascii?Q?KjiJj7jKoROzzBqNKXwyISRkDne/6L6/F9s0spXlasFLxA4WGKtSKVQJtlvE?= =?us-ascii?Q?YSicG47r4eFAf24pNB0TBVRCnBY3F5Ccn0xUPc+JTJS1kN17nNv9XJKnAFou?= =?us-ascii?Q?g/eln0lHalC/kGceGSCEYf0RLL5WkuNAq9wDbtyPSV/DTdMUA4/B02b/al2f?= =?us-ascii?Q?CxpFxrd9oPeJK6EYUVhcGtmdXyc3nTmOukVnYwsIpbXHbSgk07rIUhVDFsyb?= =?us-ascii?Q?iyytEx19ggYgpYvGErafiLRctrLPae38YRL6e98OHbX37Xh6GHpr8sGz605R?= =?us-ascii?Q?BDMedvUDWe+F4fAgFhGhpuaL/ZYC7eqb+MddxHqrBDgY6okeM2nyQyq7BAY8?= =?us-ascii?Q?AZXuIzGIp3Li1CALRA4qIAXFnTSMl7+dRvNNpc8rBibR9FEZWoMjghQTZ218?= =?us-ascii?Q?tDhqoTxe57cQOseO0fFDFfbWUMMLAfLe3Rt3LVNTwtkO0Pht43QyJY7srat+?= =?us-ascii?Q?3q88kAGNreWB1zWztQ+Rv7lLPnhGb1ZevRQsAem+SzlSDTc9QxQEoReHxt5M?= =?us-ascii?Q?4ZMBUJExek480oV/gFzXbws3EIn/ULXiwTrzbuIXHwX+SxBSaSp1E/GmMIOq?= =?us-ascii?Q?EN1VBUr277yzg712/FrlOlaAol9/jwHqOOTyhMsfLEJE4/USd8fQKtUiG2YE?= =?us-ascii?Q?Ihb2RJCnBoz5/pnmUG52x/fP2gIlP53F9SDAsIliFX6AzPjqCZLlTpPC2KXj?= =?us-ascii?Q?HDCtRhoWu3efvdMqWmVTWDyT4xmTKUpW8QkOVviZjMnUdW+4tgJfEKHKoZYb?= =?us-ascii?Q?Y5PqWJsrKzOgWNMZ7VUdAmd3MYKIAdT5x3xc?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Jun 2025 16:25:46.8267 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ceaa7b7c-3a78-4a51-16a4-08dda9cdc97d X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: MN1PEPF0000ECD7.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB6103 Jakub Kicinski writes: > On Wed, 11 Jun 2025 17:30:15 +0200 Petr Machata wrote: >> Could it actually have been caused by another test? The howto page >> mentions that the CI is running the tests one at a time, so I don't >> suppose that's a possibility. >> >> I'll try to run a more fuller suite tomorrow and star at the code a bit >> to see if I might be missing an error branch or something. > > We also hit a crash in ipv6 fcnal.sh, too. Looks like this is either a > kmemleak false positive or possibly related to the rtnl changes in ipv6. > Either way I it's not related to you changes, sorry about that! :( No problem. > [ 2900.792890] BUG: kernel NULL pointer dereference, address: 0000000000000108 > [ 2900.792961] #PF: supervisor read access in kernel mode > [ 2900.793017] #PF: error_code(0x0000) - not-present page > [ 2900.793053] PGD 8fd6067 P4D 8fd6067 PUD 6402067 PMD 0 > [ 2900.793097] Oops: Oops: 0000 [#1] SMP NOPTI > [ 2900.793127] CPU: 0 UID: 0 PID: 15652 Comm: nettest Not tainted 6.15.0-virtme #1 PREEMPT(voluntary) > [ 2900.793200] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 > [ 2900.793245] RIP: 0010:ip6_pol_route+0x286/0x4a0 > [ 2900.793290] Code: 0c 24 0f 85 fb 01 00 00 09 ca 0f 88 2f 01 00 00 e8 cf 11 43 ff 83 cb 08 48 8d 7c 24 18 e8 32 7b ff ff 0f b7 cb ba ff ff ff ff <4c> 8b 80 08 01 00 00 48 89 c6 49 89 c7 49 8d b8 80 06 00 00 4c 89 > [ 2900.793422] RSP: 0018:ffffc08a0932f480 EFLAGS: 00010246 > [ 2900.793460] RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000008 > [ 2900.793521] RDX: 00000000ffffffff RSI: ffffc08a0932f740 RDI: ffff9adac8c8f1a8 > [ 2900.793580] RBP: ffff9adac87458c0 R08: 0000000000000000 R09: 0000000000000000 > [ 2900.793635] R10: 0000000000000000 R11: 0000000000000040 R12: ffff9adac82e362c > [ 2900.793692] R13: ffff9adac82e3600 R14: 0000000000000080 R15: 0000000000000000 > [ 2900.793752] FS: 00007f3418913740(0000) GS:ffff9adb7373a000(0000) knlGS:0000000000000000 > [ 2900.793816] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 2900.793864] CR2: 0000000000000108 CR3: 0000000008007004 CR4: 0000000000772ef0 > [ 2900.793920] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 2900.793977] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > [ 2900.794031] PKRU: 55555554 > [ 2900.794050] Call Trace: > [ 2900.794070] > [ 2900.794090] ? __pfx_ip6_pol_route_output+0x10/0x10 > [ 2900.794131] fib6_rule_action+0xe3/0x310 > [ 2900.794166] fib_rules_lookup+0x1b2/0x2b0 > [ 2900.794200] ? __pfx_ip6_pol_route_output+0x10/0x10 > [ 2900.794241] fib6_rule_lookup+0xa9/0x270 > [ 2900.794271] ? __pfx_ip6_pol_route_output+0x10/0x10 > [ 2900.794310] ip6_route_output_flags+0xab/0x180 > [ 2900.794353] ip6_dst_lookup_tail.constprop.0+0x282/0x340 > [ 2900.794394] ip6_dst_lookup_flow+0x46/0xc0 > [ 2900.794422] vrf_xmit+0x100/0x4a0 > [ 2900.794459] dev_hard_start_xmit+0x8d/0x1c0 > > https://netdev-3.bots.linux.dev/vmksft-net/results/160541/vm-crash-thr0-0 Didn't see this issue either FWIW.