[ 2.161462] tun: Universal TUN/TAP device driver, 1.6 [ 3.169423] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 3.169529] #PF: supervisor write access in kernel mode [ 3.169575] #PF: error_code(0x0002) - not-present page [ 3.169608] PGD 2fe6067 P4D 2fe6067 PUD 2fe5067 PMD 0 [ 3.169645] Oops: Oops: 0002 [#1] SMP [ 3.169680] CPU: 3 UID: 0 PID: 251 Comm: packetdrill Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 3.169747] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 3.169797] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.169844] 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 [ 3.169964] RSP: 0018:ffffbe34405c7cb8 EFLAGS: 00010046 [ 3.170000] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb7803 [ 3.170049] RDX: ffffbe34405c7cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.170100] RBP: ffffbe34405c7cf0 R08: 0000000000000000 R09: 000000000000025e [ 3.170167] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 3.170221] R13: ffffbe34405c7de8 R14: 0000000000000020 R15: 0000000000000000 [ 3.170277] FS: 0000000004ed13c0(0000) GS:ffff9b3001158000(0000) knlGS:0000000000000000 [ 3.170346] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.170400] CR2: 0000000000000000 CR3: 0000000002fed003 CR4: 0000000000772ef0 [ 3.170450] PKRU: 55555554 [ 3.170469] Call Trace: [ 3.170497] [ 3.170521] __cancel_work+0x29/0xe0 [ 3.170560] ? dev_deactivate_many+0x2c9/0x300 [ 3.170600] __cancel_work_sync+0x16/0x80 [ 3.170631] __dev_close_many+0x11b/0x280 [ 3.170661] netif_close_many+0x98/0x160 [ 3.170700] unregister_netdevice_many_notify+0x1d8/0xa50 [ 3.170739] ? __queue_work+0x139/0x4e0 [ 3.170784] unregister_netdevice_queue+0xa0/0xe0 [ 3.170823] __tun_detach+0x45e/0x490 [tun] [ 3.170856] tun_chr_close+0x35/0xa0 [tun] [ 3.170892] __fput+0xda/0x290 [ 3.170925] __x64_sys_close+0x3d/0x80 [ 3.170955] do_syscall_64+0xa4/0xfd0 [ 3.170987] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 3.171025] RIP: 0033:0x4901eb [ 3.171050] 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 [ 3.171187] RSP: 002b:00007fff1b63fba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 3.171240] RAX: ffffffffffffffda RBX: 00007fff1b6400b8 RCX: 00000000004901eb [ 3.171299] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000006 [ 3.171354] RBP: 00007fff1b63fbe0 R08: 0000000000000000 R09: 0000000000000000 [ 3.171412] R10: 0000000004ed9040 R11: 0000000000000293 R12: 00007fff1b640078 [ 3.171461] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 3.171523] [ 3.171538] Modules linked in: xt_tcpudp xt_conntrack nft_compat nf_tables x_tables nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 tun [ 3.171631] CR2: 0000000000000000 [ 3.171655] ---[ end trace 0000000000000000 ]--- [ 3.171695] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 3.171733] 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 [ 3.171862] RSP: 0018:ffffbe34405c7cb8 EFLAGS: 00010046 [ 3.171901] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000fffb7803 [ 3.171950] RDX: ffffbe34405c7cf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 3.171999] RBP: ffffbe34405c7cf0 R08: 0000000000000000 R09: 000000000000025e [ 3.172049] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 3.172104] R13: ffffbe34405c7de8 R14: 0000000000000020 R15: 0000000000000000 [ 3.172175] FS: 0000000004ed13c0(0000) GS:ffff9b3001158000(0000) knlGS:0000000000000000 [ 3.172234] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.172281] CR2: 0000000000000000 CR3: 0000000002fed003 CR4: 0000000000772ef0 [ 3.172345] PKRU: 55555554 [ 3.172366] note: packetdrill[251] exited with irqs disabled WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr WAIT TIMEOUT stderr