[ 2.589317] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 2.589443] #PF: supervisor write access in kernel mode [ 2.589486] #PF: error_code(0x0002) - not-present page [ 2.589517] PGD 4d61067 P4D 4d61067 PUD 4d60067 PMD 0 [ 2.589554] Oops: Oops: 0002 [#1] SMP [ 2.589583] CPU: 2 UID: 0 PID: 229 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 2.589643] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.589686] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.589727] 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 [ 2.589848] RSP: 0018:ffff9a4d80597cb8 EFLAGS: 00010046 [ 2.589887] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb75bf [ 2.589928] RDX: ffff9a4d80597cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.589978] RBP: ffff9a4d80597cf0 R08: 0000000000000000 R09: 000000000000016f [ 2.590024] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.590068] R13: ffff9a4d80597de8 R14: 0000000000000020 R15: 0000000000000000 [ 2.590117] FS: 000000003a59f3c0(0000) GS:ffff8e436b0e6000(0000) knlGS:0000000000000000 [ 2.590168] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.590210] CR2: 0000000000000000 CR3: 0000000002fbb006 CR4: 0000000000772ef0 [ 2.590264] PKRU: 55555554 [ 2.590284] Call Trace: [ 2.590301] [ 2.590327] __cancel_work+0x29/0xe0 [ 2.590365] ? dev_deactivate_many+0x2c9/0x300 [ 2.590406] __cancel_work_sync+0x16/0x80 [ 2.590434] __dev_close_many+0x11b/0x280 [ 2.590464] netif_close_many+0x98/0x160 [ 2.590497] unregister_netdevice_many_notify+0x1d8/0xa50 [ 2.590532] ? __queue_work+0x139/0x4e0 [ 2.590561] unregister_netdevice_queue+0xa0/0xe0 [ 2.590597] __tun_detach+0x45e/0x490 [ 2.590626] tun_chr_close+0x35/0xa0 [ 2.590653] __fput+0xda/0x290 [ 2.590684] __x64_sys_close+0x3d/0x80 [ 2.590712] do_syscall_64+0xa4/0xfd0 [ 2.590741] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2.590776] RIP: 0033:0x4901eb [ 2.590805] 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 [ 2.590914] RSP: 002b:00007ffc0d8ddb60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 2.590965] RAX: ffffffffffffffda RBX: 00007ffc0d8de0b8 RCX: 00000000004901eb [ 2.591016] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 2.591067] RBP: 00007ffc0d8ddba0 R08: 0000000000000000 R09: 0000000000000000 [ 2.591112] R10: 0000000000000040 R11: 0000000000000293 R12: 00007ffc0d8de038 [ 2.591156] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 2.591202] [ 2.591222] Modules linked in: [ 2.591252] CR2: 0000000000000000 [ 2.591280] ---[ end trace 0000000000000000 ]--- [ 2.591316] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 2.591351] 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 [ 2.591464] RSP: 0018:ffff9a4d80597cb8 EFLAGS: 00010046 [ 2.591499] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb75bf [ 2.591544] RDX: ffff9a4d80597cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 2.591595] RBP: ffff9a4d80597cf0 R08: 0000000000000000 R09: 000000000000016f [ 2.591640] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 2.591685] R13: ffff9a4d80597de8 R14: 0000000000000020 R15: 0000000000000000 [ 2.591731] FS: 000000003a59f3c0(0000) GS:ffff8e436b0e6000(0000) knlGS:0000000000000000 [ 2.591782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.591824] CR2: 0000000000000000 CR3: 0000000002fbb006 CR4: 0000000000772ef0 [ 2.591871] PKRU: 55555554 [ 2.591892] note: packetdrill[229] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr