[ 14.415181] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 14.415290] #PF: supervisor write access in kernel mode [ 14.415341] #PF: error_code(0x0002) - not-present page [ 14.415393] PGD 0 P4D 0 [ 14.415420] Oops: Oops: 0002 [#1] SMP [ 14.415461] CPU: 3 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 14.415561] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.415629] Workqueue: netns cleanup_net [ 14.415677] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 14.415738] 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 [ 14.415911] RSP: 0000:ffffa95880257bb8 EFLAGS: 00010046 [ 14.415968] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff [ 14.416048] RDX: ffffa95880257bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 14.416123] RBP: ffffa95880257bf0 R08: ffffffffaf693e00 R09: 0000000000000101 [ 14.416201] R10: ffffffffb02080d8 R11: ffffa9588013cff8 R12: 0000000000000000 [ 14.416277] R13: ffffa95880257ce8 R14: 0000000000000020 R15: ffffa95880257df0 [ 14.416359] FS: 0000000000000000(0000) GS:ffff98f34e311000(0000) knlGS:0000000000000000 [ 14.416443] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 14.416514] CR2: 0000000000000000 CR3: 00000000063c0006 CR4: 0000000000772ef0 [ 14.416591] PKRU: 55555554 [ 14.416619] Call Trace: [ 14.416643] [ 14.416665] __cancel_work+0x29/0xe0 [ 14.416705] ? dev_deactivate_many+0x2c9/0x300 [ 14.416758] __cancel_work_sync+0x16/0x80 [ 14.416800] __dev_close_many+0x113/0x2b0 [ 14.416842] netif_close_many+0x98/0x160 [ 14.416883] unregister_netdevice_many_notify+0x10c/0xaa0 [ 14.416936] default_device_exit_batch+0x29b/0x300 [ 14.416982] ? mutex_lock+0x12/0x30 [ 14.417024] ops_undo_list+0xec/0x1f0 [ 14.417067] cleanup_net+0x1b7/0x300 [ 14.417109] process_one_work+0x162/0x380 [ 14.417144] worker_thread+0x299/0x3c0 [ 14.417186] ? rescuer_thread+0x4c0/0x4c0 [ 14.417224] kthread+0x101/0x1f0 [ 14.417268] ? kthreads_online_cpu+0x110/0x110 [ 14.417321] ? kthreads_online_cpu+0x110/0x110 [ 14.417375] ret_from_fork+0x11c/0x140 [ 14.417419] ? kthreads_online_cpu+0x110/0x110 [ 14.417473] ret_from_fork_asm+0x11/0x20 [ 14.417519] [ 14.417548] Modules linked in: [ 14.417586] CR2: 0000000000000000 [ 14.417624] ---[ end trace 0000000000000000 ]--- [ 14.417676] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 14.417725] 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 [ 14.417899] RSP: 0000:ffffa95880257bb8 EFLAGS: 00010046 [ 14.417950] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff [ 14.418029] RDX: ffffa95880257bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 14.418107] RBP: ffffa95880257bf0 R08: ffffffffaf693e00 R09: 0000000000000101 [ 14.418182] R10: ffffffffb02080d8 R11: ffffa9588013cff8 R12: 0000000000000000 [ 14.418258] R13: ffffa95880257ce8 R14: 0000000000000020 R15: ffffa95880257df0 [ 14.418334] FS: 0000000000000000(0000) GS:ffff98f34e311000(0000) knlGS:0000000000000000 [ 14.418408] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 14.418469] CR2: 0000000000000000 CR3: 00000000063c0006 CR4: 0000000000772ef0 [ 14.418541] PKRU: 55555554 [ 14.418568] note: kworker/u16:1[67] exited with irqs disabled