[ 1.936588] ip (253) used greatest stack depth: 12136 bytes left [ 5.061442] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 5.061543] #PF: supervisor write access in kernel mode [ 5.061588] #PF: error_code(0x0002) - not-present page [ 5.061639] PGD 0 P4D 0 [ 5.061664] Oops: Oops: 0002 [#1] SMP [ 5.061710] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 5.061807] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 5.061869] Workqueue: netns cleanup_net [ 5.061927] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 5.061983] 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 [ 5.062147] RSP: 0018:ffffa7b300067bb8 EFLAGS: 00010046 [ 5.062190] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff [ 5.062256] RDX: ffffa7b300067bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 5.062321] RBP: ffffa7b300067bf0 R08: ffffffffae093e00 R09: 0000000000000101 [ 5.062393] R10: ffffffffaec080d8 R11: ffffa7b300003ff8 R12: 0000000000000000 [ 5.062460] R13: ffffa7b300067ce8 R14: 0000000000000020 R15: ffffa7b300067df0 [ 5.062532] FS: 0000000000000000(0000) GS:ffff94d68f791000(0000) knlGS:0000000000000000 [ 5.062598] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 5.062660] CR2: 0000000000000000 CR3: 0000000004476001 CR4: 0000000000772ef0 [ 5.062724] PKRU: 55555554 [ 5.062759] Call Trace: [ 5.062786] [ 5.062813] __cancel_work+0x29/0xe0 [ 5.062861] ? dev_deactivate_many+0x2c9/0x300 [ 5.062920] __cancel_work_sync+0x16/0x80 [ 5.062955] __dev_close_many+0x113/0x2b0 [ 5.063002] netif_close_many+0x98/0x160 [ 5.063041] unregister_netdevice_many_notify+0x1ea/0xaa0 [ 5.063088] default_device_exit_batch+0x29b/0x300 [ 5.063139] ? mutex_lock+0x12/0x30 [ 5.063182] ops_undo_list+0xec/0x1f0 [ 5.063217] cleanup_net+0x1b7/0x300 [ 5.063252] process_one_work+0x162/0x380 [ 5.063299] worker_thread+0x299/0x3c0 [ 5.063342] ? rescuer_thread+0x4c0/0x4c0 [ 5.063389] kthread+0x101/0x1f0 [ 5.063431] ? kthreads_online_cpu+0x110/0x110 [ 5.063473] ? kthreads_online_cpu+0x110/0x110 [ 5.063526] ret_from_fork+0x11c/0x140 [ 5.063564] ? kthreads_online_cpu+0x110/0x110 [ 5.063605] ret_from_fork_asm+0x11/0x20 [ 5.063655] [ 5.063680] Modules linked in: unix_diag [ 5.063728] CR2: 0000000000000000 [ 5.063769] ---[ end trace 0000000000000000 ]--- [ 5.063828] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 5.063878] 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 [ 5.064029] RSP: 0018:ffffa7b300067bb8 EFLAGS: 00010046 [ 5.064070] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff [ 5.064145] RDX: ffffa7b300067bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 5.064200] RBP: ffffa7b300067bf0 R08: ffffffffae093e00 R09: 0000000000000101 [ 5.064263] R10: ffffffffaec080d8 R11: ffffa7b300003ff8 R12: 0000000000000000 [ 5.064340] R13: ffffa7b300067ce8 R14: 0000000000000020 R15: ffffa7b300067df0 [ 5.064407] FS: 0000000000000000(0000) GS:ffff94d68f791000(0000) knlGS:0000000000000000 [ 5.064484] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 5.064534] CR2: 0000000000000000 CR3: 0000000004476001 CR4: 0000000000772ef0 [ 5.064597] PKRU: 55555554 [ 5.064621] note: kworker/u16:0[12] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr WAIT TIMEOUT stderr