[ 2.774254] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 2.774391] #PF: supervisor write access in kernel mode [ 2.774439] #PF: error_code(0x0002) - not-present page [ 2.774482] PGD 2f96067 P4D 2f96067 PUD 2f97067 PMD 0 [ 2.774547] Oops: Oops: 0002 [#1] SMP [ 2.774606] CPU: 3 UID: 0 PID: 229 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 2.774680] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.774757] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.774835] 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 [ 2.774974] RSP: 0018:ffffa18400587cb8 EFLAGS: 00010046 [ 2.775025] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb7677 [ 2.775100] RDX: ffffa18400587cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.775161] RBP: ffffa18400587cf0 R08: 0000000000000000 R09: 000000000000029d [ 2.775231] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.775284] R13: ffffa18400587de8 R14: 0000000000000020 R15: 0000000000000000 [ 2.775349] FS: 0000000019cfc3c0(0000) GS:ffff8d8e8a766000(0000) knlGS:0000000000000000 [ 2.775414] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.775464] CR2: 0000000000000000 CR3: 0000000001c13005 CR4: 0000000000772ef0 [ 2.775532] PKRU: 55555554 [ 2.775556] Call Trace: [ 2.775590] [ 2.775622] __cancel_work+0x29/0xe0 [ 2.775660] ? dev_deactivate_many+0x2c9/0x300 [ 2.775732] __cancel_work_sync+0x16/0x80 [ 2.775772] __dev_close_many+0x11b/0x280 [ 2.775825] netif_close_many+0x98/0x160 [ 2.775861] unregister_netdevice_many_notify+0x1d8/0xa50 [ 2.775907] ? __queue_work+0x139/0x4e0 [ 2.775953] unregister_netdevice_queue+0xa0/0xe0 [ 2.776003] __tun_detach+0x45e/0x490 [ 2.776054] tun_chr_close+0x35/0xa0 [ 2.776091] __fput+0xda/0x290 [ 2.776147] __x64_sys_close+0x3d/0x80 [ 2.776187] do_syscall_64+0xa4/0xfd0 [ 2.776246] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2.776309] RIP: 0033:0x4901eb [ 2.776350] 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 [ 2.776497] RSP: 002b:00007ffc72d64c40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 2.776571] RAX: ffffffffffffffda RBX: 00007ffc72d65198 RCX: 00000000004901eb [ 2.776626] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 2.776679] RBP: 00007ffc72d64c80 R08: 0000000000000000 R09: 0000000000000000 [ 2.776765] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffc72d65118 [ 2.776835] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 2.776895] [ 2.776918] Modules linked in: [ 2.776966] CR2: 0000000000000000 [ 2.777010] ---[ end trace 0000000000000000 ]--- [ 2.777067] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.777115] 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 [ 2.777268] RSP: 0018:ffffa18400587cb8 EFLAGS: 00010046 [ 2.777310] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb7677 [ 2.777376] RDX: ffffa18400587cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.777431] RBP: ffffa18400587cf0 R08: 0000000000000000 R09: 000000000000029d [ 2.777497] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.777571] R13: ffffa18400587de8 R14: 0000000000000020 R15: 0000000000000000 [ 2.777627] FS: 0000000019cfc3c0(0000) GS:ffff8d8e8a766000(0000) knlGS:0000000000000000 [ 2.777688] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.777768] CR2: 0000000000000000 CR3: 0000000001c13005 CR4: 0000000000772ef0 [ 2.777837] PKRU: 55555554 [ 2.777863] note: packetdrill[229] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr