[ 2.465277] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 2.465363] #PF: supervisor write access in kernel mode [ 2.465406] #PF: error_code(0x0002) - not-present page [ 2.465452] PGD 59f7067 P4D 59f7067 PUD 59f8067 PMD 0 [ 2.465499] Oops: Oops: 0002 [#1] SMP [ 2.465534] CPU: 0 UID: 0 PID: 230 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 2.465617] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.465674] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.465732] 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 [ 2.465890] RSP: 0018:ffffbe15c05bfcb8 EFLAGS: 00010046 [ 2.465935] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb7543 [ 2.466001] RDX: ffffbe15c05bfcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.466069] RBP: ffffbe15c05bfcf0 R08: 0000000000000000 R09: 0000000000000045 [ 2.466136] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.466203] R13: ffffbe15c05bfde8 R14: 0000000000000020 R15: 0000000000000000 [ 2.466272] FS: 000000001fcea3c0(0000) GS:ffffa0f5bbfe6000(0000) knlGS:0000000000000000 [ 2.466346] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.466403] CR2: 0000000000000000 CR3: 0000000005a00001 CR4: 0000000000772ef0 [ 2.466472] PKRU: 55555554 [ 2.466494] Call Trace: [ 2.466518] [ 2.466541] __cancel_work+0x29/0xe0 [ 2.466579] ? dev_deactivate_many+0x2c9/0x300 [ 2.466632] __cancel_work_sync+0x16/0x80 [ 2.466665] __dev_close_many+0x11b/0x280 [ 2.466705] netif_close_many+0x98/0x160 [ 2.466739] unregister_netdevice_many_notify+0x1d8/0xa50 [ 2.466783] ? __queue_work+0x139/0x4e0 [ 2.466817] unregister_netdevice_queue+0xa0/0xe0 [ 2.466862] __tun_detach+0x45e/0x490 [ 2.466902] tun_chr_close+0x35/0xa0 [ 2.466936] __fput+0xda/0x290 [ 2.466970] __x64_sys_close+0x3d/0x80 [ 2.467003] do_syscall_64+0xa4/0xfd0 [ 2.467038] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2.467083] RIP: 0033:0x4901eb [ 2.467123] 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 [ 2.467281] RSP: 002b:00007ffc74553330 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 2.467348] RAX: ffffffffffffffda RBX: 00007ffc74553888 RCX: 00000000004901eb [ 2.467417] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 2.467484] RBP: 00007ffc74553370 R08: 0000000000000000 R09: 0000000000000000 [ 2.467552] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffc74553808 [ 2.467620] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 2.467688] [ 2.467710] Modules linked in: [ 2.467744] CR2: 0000000000000000 [ 2.467777] ---[ end trace 0000000000000000 ]--- [ 2.467822] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.467867] 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 [ 2.468032] RSP: 0018:ffffbe15c05bfcb8 EFLAGS: 00010046 [ 2.468077] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb7543 [ 2.468145] RDX: ffffbe15c05bfcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.468211] RBP: ffffbe15c05bfcf0 R08: 0000000000000000 R09: 0000000000000045 [ 2.468279] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.468347] R13: ffffbe15c05bfde8 R14: 0000000000000020 R15: 0000000000000000 [ 2.468416] FS: 000000001fcea3c0(0000) GS:ffffa0f5bbfe6000(0000) knlGS:0000000000000000 [ 2.468489] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.468545] CR2: 0000000000000000 CR3: 0000000005a00001 CR4: 0000000000772ef0 [ 2.468614] PKRU: 55555554 [ 2.468636] note: packetdrill[230] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr