[ 3.285357] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 3.285527] #PF: supervisor write access in kernel mode [ 3.285603] #PF: error_code(0x0002) - not-present page [ 3.285659] PGD 301f067 P4D 301f067 PUD 1e9d067 PMD 0 [ 3.285715] Oops: Oops: 0002 [#1] SMP [ 3.285760] CPU: 0 UID: 0 PID: 227 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 3.285885] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 3.285963] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.286036] 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 [ 3.286227] RSP: 0018:ffffa6ff4059fcb8 EFLAGS: 00010046 [ 3.286285] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb7877 [ 3.286362] RDX: ffffa6ff4059fcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.286439] RBP: ffffa6ff4059fcf0 R08: 0000000000000000 R09: 0000000000000098 [ 3.286517] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 3.286598] R13: ffffa6ff4059fde8 R14: 0000000000000020 R15: 0000000000000000 [ 3.286682] FS: 000000003d7673c0(0000) GS:ffff96daa37e6000(0000) knlGS:0000000000000000 [ 3.286770] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.286833] CR2: 0000000000000000 CR3: 0000000001e8f002 CR4: 0000000000772ef0 [ 3.286918] PKRU: 55555554 [ 3.286946] Call Trace: [ 3.286976] [ 3.287004] __cancel_work+0x29/0xe0 [ 3.287097] ? dev_deactivate_many+0x2c9/0x300 [ 3.287158] __cancel_work_sync+0x16/0x80 [ 3.287207] __dev_close_many+0x11b/0x280 [ 3.287256] netif_close_many+0x98/0x160 [ 3.287299] unregister_netdevice_many_notify+0x1d8/0xa50 [ 3.287352] ? __queue_work+0x139/0x4e0 [ 3.287392] unregister_netdevice_queue+0xa0/0xe0 [ 3.287452] __tun_detach+0x45e/0x490 [ 3.287501] tun_chr_close+0x35/0xa0 [ 3.287542] __fput+0xda/0x290 [ 3.287588] __x64_sys_close+0x3d/0x80 [ 3.287629] do_syscall_64+0xa4/0xfd0 [ 3.287678] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 3.287733] RIP: 0033:0x4901eb [ 3.287774] 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 [ 3.287965] RSP: 002b:00007fff32ba9880 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 3.288059] RAX: ffffffffffffffda RBX: 00007fff32ba9dd8 RCX: 00000000004901eb [ 3.288147] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 3.288232] RBP: 00007fff32ba98c0 R08: 0000000000000000 R09: 0000000000000000 [ 3.288313] R10: 000000003d76ef20 R11: 0000000000000293 R12: 00007fff32ba9d58 [ 3.288392] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 3.288473] [ 3.288499] Modules linked in: [ 3.288539] CR2: 0000000000000000 [ 3.288578] ---[ end trace 0000000000000000 ]--- [ 3.288631] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.288682] 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 [ 3.288874] RSP: 0018:ffffa6ff4059fcb8 EFLAGS: 00010046 [ 3.288927] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb7877 [ 3.289008] RDX: ffffa6ff4059fcf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.289086] RBP: ffffa6ff4059fcf0 R08: 0000000000000000 R09: 0000000000000098 [ 3.289166] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 3.289243] R13: ffffa6ff4059fde8 R14: 0000000000000020 R15: 0000000000000000 [ 3.289326] FS: 000000003d7673c0(0000) GS:ffff96daa37e6000(0000) knlGS:0000000000000000 [ 3.289412] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.289478] CR2: 0000000000000000 CR3: 0000000001e8f002 CR4: 0000000000772ef0 [ 3.289562] PKRU: 55555554 [ 3.289591] note: packetdrill[227] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr