[ 2.609855] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 2.609937] #PF: supervisor write access in kernel mode [ 2.609979] #PF: error_code(0x0002) - not-present page [ 2.610021] PGD 2fb6067 P4D 2fb6067 PUD 2fb8067 PMD 0 [ 2.610063] Oops: Oops: 0002 [#1] SMP [ 2.610101] CPU: 0 UID: 0 PID: 227 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 2.610178] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.610235] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.610281] 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 [ 2.610428] RSP: 0018:ffffa5e2c05bfcb8 EFLAGS: 00010046 [ 2.610468] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb75d2 [ 2.610521] RDX: ffffa5e2c05bfcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.610584] RBP: ffffa5e2c05bfcf0 R08: 0000000000000000 R09: 00000000000003c7 [ 2.610640] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.610699] R13: ffffa5e2c05bfde8 R14: 0000000000000020 R15: 0000000000000000 [ 2.610756] FS: 000000001348c3c0(0000) GS:ffff889ea33e6000(0000) knlGS:0000000000000000 [ 2.610816] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.610866] CR2: 0000000000000000 CR3: 0000000002fdd004 CR4: 0000000000772ef0 [ 2.610926] PKRU: 55555554 [ 2.610949] Call Trace: [ 2.610969] [ 2.610992] __cancel_work+0x29/0xe0 [ 2.611026] ? dev_deactivate_many+0x2c9/0x300 [ 2.611070] __cancel_work_sync+0x16/0x80 [ 2.611102] __dev_close_many+0x11b/0x280 [ 2.611142] netif_close_many+0x98/0x160 [ 2.611184] unregister_netdevice_many_notify+0x1d8/0xa50 [ 2.611226] ? __queue_work+0x139/0x4e0 [ 2.611259] unregister_netdevice_queue+0xa0/0xe0 [ 2.611297] __tun_detach+0x45e/0x490 [ 2.611332] tun_chr_close+0x35/0xa0 [ 2.611359] __fput+0xda/0x290 [ 2.611395] __x64_sys_close+0x3d/0x80 [ 2.611429] do_syscall_64+0xa4/0xfd0 [ 2.611468] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2.611507] RIP: 0033:0x4901eb [ 2.611540] 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 [ 2.611685] RSP: 002b:00007ffee2e2cab0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 2.611744] RAX: ffffffffffffffda RBX: 00007ffee2e2d008 RCX: 00000000004901eb [ 2.611800] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 2.611859] RBP: 00007ffee2e2caf0 R08: 0000000000000000 R09: 0000000000000000 [ 2.611907] R10: 0000000013493060 R11: 0000000000000293 R12: 00007ffee2e2cf88 [ 2.611961] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 2.612019] [ 2.612041] Modules linked in: [ 2.612074] CR2: 0000000000000000 [ 2.612100] ---[ end trace 0000000000000000 ]--- [ 2.612136] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.612183] 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 [ 2.612308] RSP: 0018:ffffa5e2c05bfcb8 EFLAGS: 00010046 [ 2.612349] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb75d2 [ 2.612398] RDX: ffffa5e2c05bfcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.612458] RBP: ffffa5e2c05bfcf0 R08: 0000000000000000 R09: 00000000000003c7 [ 2.612517] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.612566] R13: ffffa5e2c05bfde8 R14: 0000000000000020 R15: 0000000000000000 [ 2.612629] FS: 000000001348c3c0(0000) GS:ffff889ea33e6000(0000) knlGS:0000000000000000 [ 2.612691] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.612741] CR2: 0000000000000000 CR3: 0000000002fdd004 CR4: 0000000000772ef0 [ 2.612801] PKRU: 55555554 [ 2.612826] note: packetdrill[227] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr