[ 3.543038] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 3.543116] #PF: supervisor write access in kernel mode [ 3.543156] #PF: error_code(0x0002) - not-present page [ 3.543194] PGD 0 P4D 0 [ 3.543218] Oops: Oops: 0002 [#1] SMP [ 3.543251] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 3.543315] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 3.543360] Workqueue: netns cleanup_net [ 3.543396] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.543444] 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 [ 3.543593] RSP: 0018:ffffb4e600067bb8 EFLAGS: 00010046 [ 3.543634] RAX: 0000000000000246 RBX: 0000000000000000 RCX: ffff9dc9c1275c70 [ 3.543690] RDX: ffffb4e600067bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.543745] RBP: ffffb4e600067bf0 R08: ffffffffad2779b0 R09: 0000000000000101 [ 3.543799] R10: ffffffffada080d8 R11: ffffb4e600003ff8 R12: 0000000000000000 [ 3.543848] R13: ffffb4e600067ce8 R14: 0000000000000020 R15: ffffb4e600067df0 [ 3.543899] FS: 0000000000000000(0000) GS:ffff9dca509c1000(0000) knlGS:0000000000000000 [ 3.543955] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.544000] CR2: 0000000000000000 CR3: 0000000009e47006 CR4: 0000000000772ef0 [ 3.544050] PKRU: 55555554 [ 3.544072] Call Trace: [ 3.544097] [ 3.544119] __cancel_work+0x29/0xe0 [ 3.544154] ? queue_delayed_work_on+0x54/0x60 [ 3.544193] __cancel_work_sync+0x16/0x80 [ 3.544223] __dev_close_many+0x11b/0x280 [ 3.544255] netif_close_many+0x98/0x160 [ 3.544287] unregister_netdevice_many_notify+0x1d8/0xa50 [ 3.544332] ? unregister_netdevice_queue+0x29/0xe0 [ 3.544375] default_device_exit_batch+0x29b/0x300 [ 3.544412] ops_undo_list+0xec/0x1f0 [ 3.544444] cleanup_net+0x1b7/0x2b0 [ 3.544474] process_one_work+0x162/0x380 [ 3.544513] worker_thread+0x299/0x3c0 [ 3.544546] ? rescuer_thread+0x4c0/0x4c0 [ 3.544576] kthread+0x101/0x1f0 [ 3.544608] ? kthreads_online_cpu+0x110/0x110 [ 3.544646] ? kthreads_online_cpu+0x110/0x110 [ 3.544685] ret_from_fork+0x11c/0x140 [ 3.544717] ? kthreads_online_cpu+0x110/0x110 [ 3.544753] ret_from_fork_asm+0x11/0x20 [ 3.544788] [ 3.544808] Modules linked in: [ 3.544834] CR2: 0000000000000000 [ 3.544863] ---[ end trace 0000000000000000 ]--- [ 3.544900] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.544938] 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 [ 3.545057] RSP: 0018:ffffb4e600067bb8 EFLAGS: 00010046 [ 3.545096] RAX: 0000000000000246 RBX: 0000000000000000 RCX: ffff9dc9c1275c70 [ 3.545146] RDX: ffffb4e600067bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.545196] RBP: ffffb4e600067bf0 R08: ffffffffad2779b0 R09: 0000000000000101 [ 3.545258] R10: ffffffffada080d8 R11: ffffb4e600003ff8 R12: 0000000000000000 [ 3.545308] R13: ffffb4e600067ce8 R14: 0000000000000020 R15: ffffb4e600067df0 [ 3.545364] FS: 0000000000000000(0000) GS:ffff9dca509c1000(0000) knlGS:0000000000000000 [ 3.545420] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.545465] CR2: 0000000000000000 CR3: 0000000009e47006 CR4: 0000000000772ef0 [ 3.545525] PKRU: 55555554 [ 3.545546] note: kworker/u16:0[12] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr WAIT TIMEOUT stderr