[ 1.976207] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 1.976310] #PF: supervisor write access in kernel mode [ 1.976352] #PF: error_code(0x0002) - not-present page [ 1.976395] PGD 4eb0067 P4D 4eb0067 PUD 4ec7067 PMD 0 [ 1.976436] Oops: Oops: 0002 [#1] SMP [ 1.976473] CPU: 3 UID: 0 PID: 229 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 1.976546] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1.976596] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 1.976645] 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 [ 1.976771] RSP: 0018:ffffba11405bfcb8 EFLAGS: 00010046 [ 1.976814] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb735d [ 1.976867] RDX: ffffba11405bfcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 1.976921] RBP: ffffba11405bfcf0 R08: 0000000000000000 R09: 000000000000029b [ 1.976975] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 1.977034] R13: ffffba11405bfde8 R14: 0000000000000020 R15: 0000000000000000 [ 1.977090] FS: 000000002ece23c0(0000) GS:ffff989a24d66000(0000) knlGS:0000000000000000 [ 1.977150] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.977198] CR2: 0000000000000000 CR3: 0000000004e9d001 CR4: 0000000000772ef0 [ 1.977252] PKRU: 55555554 [ 1.977274] Call Trace: [ 1.977294] [ 1.977319] __cancel_work+0x29/0xe0 [ 1.977352] ? dev_deactivate_many+0x2c9/0x300 [ 1.977400] __cancel_work_sync+0x16/0x80 [ 1.977434] __dev_close_many+0x11b/0x280 [ 1.977468] netif_close_many+0x98/0x160 [ 1.977500] unregister_netdevice_many_notify+0x1d8/0xa50 [ 1.977542] ? __queue_work+0x139/0x4e0 [ 1.977576] unregister_netdevice_queue+0xa0/0xe0 [ 1.977619] __tun_detach+0x45e/0x490 [ 1.977653] tun_chr_close+0x35/0xa0 [ 1.977686] __fput+0xda/0x290 [ 1.977727] __x64_sys_close+0x3d/0x80 [ 1.977761] do_syscall_64+0xa4/0xfd0 [ 1.977797] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1.977843] RIP: 0033:0x4901eb [ 1.977877] Code: 03 00 00 00 0f 05 48 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 78 04 00 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 21 79 04 00 8b 44 [ 1.978009] RSP: 002b:00007fff8158bb70 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 1.978069] RAX: ffffffffffffffda RBX: 00007fff8158c0c8 RCX: 00000000004901eb [ 1.978128] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 1.978188] RBP: 00007fff8158bbb0 R08: 0000000000000000 R09: 0000000000000000 [ 1.978242] R10: 0000000000800000 R11: 0000000000000293 R12: 00007fff8158c048 [ 1.978297] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 1.978352] [ 1.978377] Modules linked in: [ 1.978411] CR2: 0000000000000000 [ 1.978445] ---[ end trace 0000000000000000 ]--- [ 1.978490] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 1.978533] 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 [ 1.978661] RSP: 0018:ffffba11405bfcb8 EFLAGS: 00010046 [ 1.978704] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb735d [ 1.978759] RDX: ffffba11405bfcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 1.978819] RBP: ffffba11405bfcf0 R08: 0000000000000000 R09: 000000000000029b [ 1.978872] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 1.978928] R13: ffffba11405bfde8 R14: 0000000000000020 R15: 0000000000000000 [ 1.978989] FS: 000000002ece23c0(0000) GS:ffff989a24d66000(0000) knlGS:0000000000000000 [ 1.979050] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.979101] CR2: 0000000000000000 CR3: 0000000004e9d001 CR4: 0000000000772ef0 [ 1.979155] PKRU: 55555554 [ 1.979180] note: packetdrill[229] exited with irqs disabled HARD STOP (125.546583) WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr