[ 2.095826] sctp: Hash tables configured (bind 256/256) [ 2.139306] ip (258) used greatest stack depth: 12200 bytes left [ 2.323113] ip (274) used greatest stack depth: 12168 bytes left [ 23.388097] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 23.388182] #PF: supervisor write access in kernel mode [ 23.388236] #PF: error_code(0x0002) - not-present page [ 23.388279] PGD 0 P4D 0 [ 23.388302] Oops: Oops: 0002 [#1] SMP [ 23.388338] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 23.388424] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.388477] Workqueue: netns cleanup_net [ 23.388537] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 23.388593] Code: 83 e6 01 41 57 41 56 4c 8d 77 20 41 55 41 54 41 89 f4 55 48 89 d5 53 48 89 fb 9c 58 fa 48 89 45 00 45 85 e4 0f 85 8a 00 00 00 48 0f ba 2b 00 41 0f 92 c5 72 0e 5b 44 89 e8 5d 41 5c 41 5d 41 [ 23.388721] RSP: 0018:ffffa6490024fbb8 EFLAGS: 00010046 [ 23.388762] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000c00 [ 23.388829] RDX: ffffa6490024fbf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.388890] RBP: ffffa6490024fbf0 R08: ffff8f59c31c6473 R09: 0000000000000002 [ 23.388952] R10: ffff8f59feca8840 R11: ffff8f59c31c5c90 R12: 0000000000000000 [ 23.389009] R13: ffffa6490024fce8 R14: 0000000000000020 R15: ffffa6490024fdf0 [ 23.389079] FS: 0000000000000000(0000) GS:ffff8f5a45211000(0000) knlGS:0000000000000000 [ 23.389144] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.389208] CR2: 0000000000000000 CR3: 000000003ce46003 CR4: 0000000000772ef0 [ 23.389269] PKRU: 55555554 [ 23.389295] Call Trace: [ 23.389319] [ 23.389348] __cancel_work+0x29/0xe0 [ 23.389389] ? queue_delayed_work_on+0x54/0x60 [ 23.389439] __cancel_work_sync+0x16/0x80 [ 23.389476] __dev_close_many+0x113/0x2b0 [ 23.389525] netif_close_many+0x98/0x160 [ 23.389567] unregister_netdevice_many_notify+0x1ea/0xaa0 [ 23.389610] ? unregister_netdevice_queue+0x29/0xe0 [ 23.389654] default_device_exit_batch+0x29b/0x300 [ 23.389696] ? mutex_lock+0x12/0x30 [ 23.389737] ops_undo_list+0xec/0x1f0 [ 23.389767] cleanup_net+0x1b7/0x300 [ 23.389800] process_one_work+0x162/0x380 [ 23.389832] worker_thread+0x299/0x3c0 [ 23.389870] ? rescuer_thread+0x4c0/0x4c0 [ 23.389900] kthread+0x101/0x1f0 [ 23.389943] ? kthreads_online_cpu+0x110/0x110 [ 23.389991] ? kthreads_online_cpu+0x110/0x110 [ 23.390032] ret_from_fork+0x11c/0x140 [ 23.390082] ? kthreads_online_cpu+0x110/0x110 [ 23.390123] ret_from_fork_asm+0x11/0x20 [ 23.390168] [ 23.390185] Modules linked in: sctp_diag sctp [ 23.390232] CR2: 0000000000000000 [ 23.390264] ---[ end trace 0000000000000000 ]--- [ 23.390298] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 23.390336] Code: 83 e6 01 41 57 41 56 4c 8d 77 20 41 55 41 54 41 89 f4 55 48 89 d5 53 48 89 fb 9c 58 fa 48 89 45 00 45 85 e4 0f 85 8a 00 00 00 48 0f ba 2b 00 41 0f 92 c5 72 0e 5b 44 89 e8 5d 41 5c 41 5d 41 [ 23.390463] RSP: 0018:ffffa6490024fbb8 EFLAGS: 00010046 [ 23.390500] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000c00 [ 23.390573] RDX: ffffa6490024fbf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.390635] RBP: ffffa6490024fbf0 R08: ffff8f59c31c6473 R09: 0000000000000002 [ 23.390688] R10: ffff8f59feca8840 R11: ffff8f59c31c5c90 R12: 0000000000000000 [ 23.390745] R13: ffffa6490024fce8 R14: 0000000000000020 R15: ffffa6490024fdf0 [ 23.390804] FS: 0000000000000000(0000) GS:ffff8f5a45211000(0000) knlGS:0000000000000000 [ 23.390868] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.390912] CR2: 0000000000000000 CR3: 000000003ce46003 CR4: 0000000000772ef0 [ 23.390972] PKRU: 55555554 [ 23.390993] note: kworker/u16:1[66] exited with irqs disabled