[ 2.689296] ip (338) used greatest stack depth: 11912 bytes left [ 7.130139] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 7.130209] #PF: supervisor write access in kernel mode [ 7.130249] #PF: error_code(0x0002) - not-present page [ 7.130288] PGD 0 P4D 0 [ 7.130310] Oops: Oops: 0002 [#1] SMP [ 7.130343] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 7.130413] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 7.130460] Workqueue: netns cleanup_net [ 7.130496] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 7.130539] 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 [ 7.130660] RSP: 0018:ffffb3d4c0067b88 EFLAGS: 00010046 [ 7.130698] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000004 [ 7.130757] RDX: ffffb3d4c0067bc0 RSI: 0000000000000000 RDI: 0000000000000000 [ 7.130805] RBP: ffffb3d4c0067bc0 R08: ffffa09dc139b673 R09: ffffffff90c71c80 [ 7.130856] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 7.130913] R13: 0000000000000000 R14: 0000000000000020 R15: 0000000000000001 [ 7.130975] FS: 0000000000000000(0000) GS:ffffa09e6d791000(0000) knlGS:0000000000000000 [ 7.131043] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 7.131100] CR2: 0000000000000000 CR3: 0000000001b57005 CR4: 0000000000772ef0 [ 7.131152] PKRU: 55555554 [ 7.131173] Call Trace: [ 7.131191] [ 7.131213] __cancel_work+0x29/0xe0 [ 7.131248] ? linkwatch_urgent_event+0x2f/0xb0 [ 7.131288] __cancel_work_sync+0x16/0x80 [ 7.131319] __dev_close_many+0x113/0x2b0 [ 7.131352] __dev_change_flags+0xed/0x220 [ 7.131384] netif_change_flags+0x25/0x60 [ 7.131415] dev_change_flags+0x40/0xa0 [ 7.131446] cycle_netdev+0x36/0x70 [ 7.131481] vrf_dellink+0x5c/0xa0 [ 7.131513] default_device_exit_batch+0x246/0x300 [ 7.131552] ? mutex_lock+0x12/0x30 [ 7.131585] ops_undo_list+0xec/0x1f0 [ 7.131618] cleanup_net+0x1b7/0x300 [ 7.131649] process_one_work+0x162/0x380 [ 7.131681] worker_thread+0x299/0x3c0 [ 7.131712] ? rescuer_thread+0x4c0/0x4c0 [ 7.131743] kthread+0x101/0x1f0 [ 7.131775] ? kthreads_online_cpu+0x110/0x110 [ 7.131814] ? kthreads_online_cpu+0x110/0x110 [ 7.131855] ret_from_fork+0x11c/0x140 [ 7.131887] ? kthreads_online_cpu+0x110/0x110 [ 7.131926] ret_from_fork_asm+0x11/0x20 [ 7.131967] [ 7.131985] Modules linked in: [ 7.132017] CR2: 0000000000000000 [ 7.132048] ---[ end trace 0000000000000000 ]--- [ 7.132082] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 7.132122] 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 [ 7.132244] RSP: 0018:ffffb3d4c0067b88 EFLAGS: 00010046 [ 7.132286] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000004 [ 7.132336] RDX: ffffb3d4c0067bc0 RSI: 0000000000000000 RDI: 0000000000000000 [ 7.132386] RBP: ffffb3d4c0067bc0 R08: ffffa09dc139b673 R09: ffffffff90c71c80 [ 7.132436] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 7.132490] R13: 0000000000000000 R14: 0000000000000020 R15: 0000000000000001 [ 7.132547] FS: 0000000000000000(0000) GS:ffffa09e6d791000(0000) knlGS:0000000000000000 [ 7.132603] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 7.132648] CR2: 0000000000000000 CR3: 0000000001b57005 CR4: 0000000000772ef0 [ 7.132701] PKRU: 55555554 [ 7.132729] note: kworker/u16:0[12] exited with irqs disabled