[ 3.398514] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 3.398600] #PF: supervisor write access in kernel mode [ 3.398635] #PF: error_code(0x0002) - not-present page [ 3.398671] PGD 3295067 P4D 3295067 PUD 3296067 PMD 0 [ 3.398710] Oops: Oops: 0002 [#1] SMP [ 3.398740] CPU: 2 UID: 0 PID: 229 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 3.398809] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 3.398853] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.398896] 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 [ 3.399006] RSP: 0018:ffffaf62005d7cb8 EFLAGS: 00010046 [ 3.399042] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb78e6 [ 3.399092] RDX: ffffaf62005d7cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.399143] RBP: ffffaf62005d7cf0 R08: 0000000000000000 R09: 0000000000000043 [ 3.399193] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 3.399244] R13: ffffaf62005d7de8 R14: 0000000000000020 R15: 0000000000000000 [ 3.399296] FS: 000000003ff3d3c0(0000) GS:ffff987241ee6000(0000) knlGS:0000000000000000 [ 3.399353] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.399395] CR2: 0000000000000000 CR3: 000000000310b003 CR4: 0000000000772ef0 [ 3.399447] PKRU: 55555554 [ 3.399466] Call Trace: [ 3.399489] [ 3.399509] __cancel_work+0x29/0xe0 [ 3.399539] ? dev_deactivate_many+0x2c9/0x300 [ 3.399581] __cancel_work_sync+0x16/0x80 [ 3.399610] __dev_close_many+0x11b/0x280 [ 3.399641] netif_close_many+0x98/0x160 [ 3.399669] unregister_netdevice_many_notify+0x1d8/0xa50 [ 3.399705] ? __queue_work+0x139/0x4e0 [ 3.399733] unregister_netdevice_queue+0xa0/0xe0 [ 3.399768] __tun_detach+0x45e/0x490 [ 3.399800] tun_chr_close+0x35/0xa0 [ 3.399829] __fput+0xda/0x290 [ 3.399866] __x64_sys_close+0x3d/0x80 [ 3.399893] do_syscall_64+0xa4/0xfd0 [ 3.399925] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 3.399961] RIP: 0033:0x4901eb [ 3.399988] 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 [ 3.400098] RSP: 002b:00007ffe592ba8a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 3.400148] RAX: ffffffffffffffda RBX: 00007ffe592badf8 RCX: 00000000004901eb [ 3.400198] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 3.400249] RBP: 00007ffe592ba8e0 R08: 0000000000000000 R09: 0000000000000000 [ 3.400299] R10: 000000003ff44540 R11: 0000000000000293 R12: 00007ffe592bad78 [ 3.400350] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 3.400402] [ 3.400421] Modules linked in: [ 3.400451] CR2: 0000000000000000 [ 3.400478] ---[ end trace 0000000000000000 ]--- [ 3.400513] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.400549] 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 [ 3.400659] RSP: 0018:ffffaf62005d7cb8 EFLAGS: 00010046 [ 3.400695] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb78e6 [ 3.400745] RDX: ffffaf62005d7cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.400798] RBP: ffffaf62005d7cf0 R08: 0000000000000000 R09: 0000000000000043 [ 3.400851] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 3.400902] R13: ffffaf62005d7de8 R14: 0000000000000020 R15: 0000000000000000 [ 3.400954] FS: 000000003ff3d3c0(0000) GS:ffff987241ee6000(0000) knlGS:0000000000000000 [ 3.401004] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.401046] CR2: 0000000000000000 CR3: 000000000310b003 CR4: 0000000000772ef0 [ 3.401097] PKRU: 55555554 [ 3.401119] note: packetdrill[229] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr