[ 3.051884] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 3.051960] #PF: supervisor write access in kernel mode [ 3.052004] #PF: error_code(0x0002) - not-present page [ 3.052042] PGD 0 P4D 0 [ 3.052061] Oops: Oops: 0002 [#1] SMP [ 3.052088] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 3.052156] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 3.052202] Workqueue: netns cleanup_net [ 3.052237] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.052285] 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 [ 3.052412] RSP: 0018:ffffbc9d4024fbb8 EFLAGS: 00010046 [ 3.052447] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000000 [ 3.052497] RDX: ffffbc9d4024fbf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.052554] RBP: ffffbc9d4024fbf0 R08: ffffffff8fc779b0 R09: 0000000000000101 [ 3.052608] R10: ffffffff904080d8 R11: ffffbc9d40003ff8 R12: 0000000000000000 [ 3.052663] R13: ffffbc9d4024fce8 R14: 0000000000000020 R15: ffffbc9d4024fdf0 [ 3.052719] FS: 0000000000000000(0000) GS:ffff9ac12dfc1000(0000) knlGS:0000000000000000 [ 3.052779] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.052829] CR2: 0000000000000000 CR3: 0000000017247005 CR4: 0000000000772ef0 [ 3.052893] PKRU: 55555554 [ 3.052910] Call Trace: [ 3.052931] [ 3.052948] __cancel_work+0x29/0xe0 [ 3.052977] ? queue_delayed_work_on+0x54/0x60 [ 3.053019] __cancel_work_sync+0x16/0x80 [ 3.053047] __dev_close_many+0x11b/0x280 [ 3.053075] netif_close_many+0x98/0x160 [ 3.053105] unregister_netdevice_many_notify+0x1d8/0xa50 [ 3.053151] ? unregister_netdevice_queue+0x29/0xe0 [ 3.053200] default_device_exit_batch+0x29b/0x300 [ 3.053237] ops_undo_list+0xec/0x1f0 [ 3.053276] cleanup_net+0x1b7/0x2b0 [ 3.053308] process_one_work+0x162/0x380 [ 3.053341] worker_thread+0x299/0x3c0 [ 3.053369] ? rescuer_thread+0x4c0/0x4c0 [ 3.053397] kthread+0x101/0x1f0 [ 3.053431] ? kthreads_online_cpu+0x110/0x110 [ 3.053472] ? kthreads_online_cpu+0x110/0x110 [ 3.053515] ret_from_fork+0x11c/0x140 [ 3.053544] ? kthreads_online_cpu+0x110/0x110 [ 3.053579] ret_from_fork_asm+0x11/0x20 [ 3.053613] [ 3.053629] Modules linked in: [ 3.053655] CR2: 0000000000000000 [ 3.053679] ---[ end trace 0000000000000000 ]--- [ 3.053717] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.053759] 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 [ 3.053894] RSP: 0018:ffffbc9d4024fbb8 EFLAGS: 00010046 [ 3.053932] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000000 [ 3.053981] RDX: ffffbc9d4024fbf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.054034] RBP: ffffbc9d4024fbf0 R08: ffffffff8fc779b0 R09: 0000000000000101 [ 3.054093] R10: ffffffff904080d8 R11: ffffbc9d40003ff8 R12: 0000000000000000 [ 3.054145] R13: ffffbc9d4024fce8 R14: 0000000000000020 R15: ffffbc9d4024fdf0 [ 3.054209] FS: 0000000000000000(0000) GS:ffff9ac12dfc1000(0000) knlGS:0000000000000000 [ 3.054268] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.054320] CR2: 0000000000000000 CR3: 0000000017247005 CR4: 0000000000772ef0 [ 3.054375] PKRU: 55555554 [ 3.054391] note: kworker/u16:1[66] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr WAIT TIMEOUT stderr