[ 3.142283] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 3.142406] #PF: supervisor write access in kernel mode [ 3.142469] #PF: error_code(0x0002) - not-present page [ 3.142507] PGD 5c35067 P4D 5c35067 PUD 330f067 PMD 0 [ 3.142550] Oops: Oops: 0002 [#1] SMP [ 3.142580] CPU: 3 UID: 0 PID: 228 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 3.142651] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 3.142697] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.142743] 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 [ 3.142890] RSP: 0018:ffffa182805a7cb8 EFLAGS: 00010046 [ 3.142929] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb77ea [ 3.142996] RDX: ffffa182805a7cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.143059] RBP: ffffa182805a7cf0 R08: 0000000000000000 R09: 00000000000002d6 [ 3.143114] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 3.143167] R13: ffffa182805a7de8 R14: 0000000000000020 R15: 0000000000000000 [ 3.143237] FS: 0000000011a773c0(0000) GS:ffff8daa94766000(0000) knlGS:0000000000000000 [ 3.143304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.143354] CR2: 0000000000000000 CR3: 0000000005c31004 CR4: 0000000000772ef0 [ 3.143415] PKRU: 55555554 [ 3.143437] Call Trace: [ 3.143461] [ 3.143483] __cancel_work+0x29/0xe0 [ 3.143522] ? dev_deactivate_many+0x2c9/0x300 [ 3.143574] __cancel_work_sync+0x16/0x80 [ 3.143604] __dev_close_many+0x11b/0x280 [ 3.143641] netif_close_many+0x98/0x160 [ 3.143672] unregister_netdevice_many_notify+0x1d8/0xa50 [ 3.143712] ? __queue_work+0x139/0x4e0 [ 3.143746] unregister_netdevice_queue+0xa0/0xe0 [ 3.143790] __tun_detach+0x45e/0x490 [ 3.143822] tun_chr_close+0x35/0xa0 [ 3.143854] __fput+0xda/0x290 [ 3.143887] __x64_sys_close+0x3d/0x80 [ 3.143918] do_syscall_64+0xa4/0xfd0 [ 3.143952] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 3.143995] RIP: 0033:0x4901eb [ 3.144026] 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 [ 3.144173] RSP: 002b:00007ffe5c57a890 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 3.144235] RAX: ffffffffffffffda RBX: 00007ffe5c57ade8 RCX: 00000000004901eb [ 3.144294] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 3.144347] RBP: 00007ffe5c57a8d0 R08: 0000000000000000 R09: 0000000000000000 [ 3.144401] R10: 0000000011a7eeb0 R11: 0000000000000293 R12: 00007ffe5c57ad68 [ 3.144466] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 3.144527] [ 3.144549] Modules linked in: [ 3.144588] CR2: 0000000000000000 [ 3.144617] ---[ end trace 0000000000000000 ]--- [ 3.144662] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.144706] 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 [ 3.144825] RSP: 0018:ffffa182805a7cb8 EFLAGS: 00010046 [ 3.144866] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb77ea [ 3.144921] RDX: ffffa182805a7cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.144969] RBP: ffffa182805a7cf0 R08: 0000000000000000 R09: 00000000000002d6 [ 3.145017] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 3.145065] R13: ffffa182805a7de8 R14: 0000000000000020 R15: 0000000000000000 [ 3.145118] FS: 0000000011a773c0(0000) GS:ffff8daa94766000(0000) knlGS:0000000000000000 [ 3.145177] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.145231] CR2: 0000000000000000 CR3: 0000000005c31004 CR4: 0000000000772ef0 [ 3.145292] PKRU: 55555554 [ 3.145314] note: packetdrill[228] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr