[ 11.020564] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 11.020658] #PF: supervisor write access in kernel mode [ 11.020706] #PF: error_code(0x0002) - not-present page [ 11.020755] PGD 0 P4D 0 [ 11.020781] Oops: Oops: 0002 [#1] SMP [ 11.020815] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 11.020906] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.020962] Workqueue: netns cleanup_net [ 11.021014] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 11.021071] 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 [ 11.021240] RSP: 0018:ffffbe72c024fbb8 EFLAGS: 00010046 [ 11.021292] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000359 [ 11.021367] RDX: ffffbe72c024fbf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 11.021426] RBP: ffffbe72c024fbf0 R08: ffffffff98693e00 R09: 0000000000000101 [ 11.021485] R10: ffffffff992080d8 R11: ffffbe72c0003ff8 R12: 0000000000000000 [ 11.021530] R13: ffffbe72c024fce8 R14: 0000000000000020 R15: ffffbe72c024fdf0 [ 11.021578] FS: 0000000000000000(0000) GS:ffff9c0ba5191000(0000) knlGS:0000000000000000 [ 11.021636] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 11.021682] CR2: 0000000000000000 CR3: 0000000005a46005 CR4: 0000000000772ef0 [ 11.021739] PKRU: 55555554 [ 11.021760] Call Trace: [ 11.021788] [ 11.021810] __cancel_work+0x29/0xe0 [ 11.021845] __cancel_work_sync+0x16/0x80 [ 11.021875] __dev_close_many+0x113/0x2b0 [ 11.021908] netif_close_many+0x98/0x160 [ 11.021936] unregister_netdevice_many_notify+0x1ea/0xaa0 [ 11.021978] ? unregister_netdevice_queue+0x29/0xe0 [ 11.022015] default_device_exit_batch+0x29b/0x300 [ 11.022054] ? mutex_lock+0x12/0x30 [ 11.022088] ops_undo_list+0xec/0x1f0 [ 11.022121] cleanup_net+0x1b7/0x300 [ 11.022150] process_one_work+0x162/0x380 [ 11.022180] worker_thread+0x299/0x3c0 [ 11.022210] ? rescuer_thread+0x4c0/0x4c0 [ 11.022243] kthread+0x101/0x1f0 [ 11.022273] ? kthreads_online_cpu+0x110/0x110 [ 11.022311] ? kthreads_online_cpu+0x110/0x110 [ 11.022349] ret_from_fork+0x11c/0x140 [ 11.022389] ? kthreads_online_cpu+0x110/0x110 [ 11.022425] ret_from_fork_asm+0x11/0x20 [ 11.022469] [ 11.022489] Modules linked in: pktgen [ 11.022521] CR2: 0000000000000000 [ 11.022550] ---[ end trace 0000000000000000 ]--- [ 11.022587] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 11.022627] 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 [ 11.022790] RSP: 0018:ffffbe72c024fbb8 EFLAGS: 00010046 [ 11.022825] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000359 [ 11.022881] RDX: ffffbe72c024fbf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 11.022932] RBP: ffffbe72c024fbf0 R08: ffffffff98693e00 R09: 0000000000000101 [ 11.022988] R10: ffffffff992080d8 R11: ffffbe72c0003ff8 R12: 0000000000000000 [ 11.023034] R13: ffffbe72c024fce8 R14: 0000000000000020 R15: ffffbe72c024fdf0 [ 11.023082] FS: 0000000000000000(0000) GS:ffff9c0ba5191000(0000) knlGS:0000000000000000 [ 11.023134] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 11.023178] CR2: 0000000000000000 CR3: 0000000005a46005 CR4: 0000000000772ef0 [ 11.023235] PKRU: 55555554 [ 11.023255] note: kworker/u16:1[66] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr WAIT TIMEOUT stderr