[ 2.798559] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 2.798647] #PF: supervisor write access in kernel mode [ 2.798690] #PF: error_code(0x0002) - not-present page [ 2.798726] PGD 4f3b067 P4D 4f3b067 PUD 4c33067 PMD 0 [ 2.798766] Oops: Oops: 0002 [#1] SMP [ 2.798809] CPU: 2 UID: 0 PID: 229 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 2.798869] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.798920] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.798971] 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 [ 2.799087] RSP: 0018:ffffae0ec05dfcb8 EFLAGS: 00010046 [ 2.799123] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb768d [ 2.799174] RDX: ffffae0ec05dfcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.799240] RBP: ffffae0ec05dfcf0 R08: 0000000000000000 R09: 0000000000000360 [ 2.799298] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.799356] R13: ffffae0ec05dfde8 R14: 0000000000000020 R15: 0000000000000000 [ 2.799417] FS: 0000000032e123c0(0000) GS:ffff93a8676e6000(0000) knlGS:0000000000000000 [ 2.799481] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.799527] CR2: 0000000000000000 CR3: 0000000004c34003 CR4: 0000000000772ef0 [ 2.799578] PKRU: 55555554 [ 2.799598] Call Trace: [ 2.799620] [ 2.799641] __cancel_work+0x29/0xe0 [ 2.799673] ? dev_deactivate_many+0x2c9/0x300 [ 2.799713] __cancel_work_sync+0x16/0x80 [ 2.799742] __dev_close_many+0x11b/0x280 [ 2.799781] netif_close_many+0x98/0x160 [ 2.799812] unregister_netdevice_many_notify+0x1d8/0xa50 [ 2.799851] ? __queue_work+0x139/0x4e0 [ 2.799882] unregister_netdevice_queue+0xa0/0xe0 [ 2.799929] __tun_detach+0x45e/0x490 [ 2.799969] tun_chr_close+0x35/0xa0 [ 2.800000] __fput+0xda/0x290 [ 2.800032] __x64_sys_close+0x3d/0x80 [ 2.800060] do_syscall_64+0xa4/0xfd0 [ 2.800092] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2.800129] RIP: 0033:0x4901eb [ 2.800161] 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 [ 2.800287] RSP: 002b:00007fff405e81f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 2.800345] RAX: ffffffffffffffda RBX: 00007fff405e8748 RCX: 00000000004901eb [ 2.800404] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 2.800455] RBP: 00007fff405e8230 R08: 0000000000000000 R09: 0000000000000000 [ 2.800512] R10: 0000000002000000 R11: 0000000000000293 R12: 00007fff405e86c8 [ 2.800563] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 2.800615] [ 2.800634] Modules linked in: [ 2.800663] CR2: 0000000000000000 [ 2.800692] ---[ end trace 0000000000000000 ]--- [ 2.800726] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.800767] 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 [ 2.800884] RSP: 0018:ffffae0ec05dfcb8 EFLAGS: 00010046 [ 2.800928] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb768d [ 2.800986] RDX: ffffae0ec05dfcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.801037] RBP: ffffae0ec05dfcf0 R08: 0000000000000000 R09: 0000000000000360 [ 2.801087] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.801137] R13: ffffae0ec05dfde8 R14: 0000000000000020 R15: 0000000000000000 [ 2.801190] FS: 0000000032e123c0(0000) GS:ffff93a8676e6000(0000) knlGS:0000000000000000 [ 2.801253] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.801303] CR2: 0000000000000000 CR3: 0000000004c34003 CR4: 0000000000772ef0 [ 2.801363] PKRU: 55555554 [ 2.801391] note: packetdrill[229] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr