[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.84' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   32.279448] netlink: 4 bytes leftover after parsing attributes in process `syz-executor379'.
executing program
executing program
[   32.359133] netlink: 4 bytes leftover after parsing attributes in process `syz-executor379'.
[   32.372115] block nbd0: NBD_DISCONNECT
[   32.376935] kasan: CONFIG_KASAN_INLINE enabled
[   32.381522] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   32.388875] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   32.395095] Modules linked in:
[   32.398281] CPU: 0 PID: 7973 Comm: systemd-udevd Not tainted 4.14.307-syzkaller #0
[   32.405984] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
[   32.406099] nbd: nbd0 already in use
[   32.415440] task: ffff88809d7524c0 task.stack: ffff8880b35b0000
[   32.425219] RIP: 0010:__lock_acquire+0x1cc/0x3f20
[   32.430046] RSP: 0018:ffff8880b35b7938 EFLAGS: 00010006
[   32.435410] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   32.442667] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000110
[   32.449923] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
[   32.457176] R10: 0000000000000001 R11: ffff88809d7524c0 R12: 0000000000000110
[   32.464446] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8bed1e40
[   32.471788] FS:  00007fcdde2fb8c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
[   32.480009] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.485972] CR2: 0000000020000280 CR3: 00000000985dd000 CR4: 00000000003406f0
[   32.493288] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.500541] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.507810] Call Trace:
[   32.510410]  ? lock_downgrade+0x740/0x740
[   32.514540]  ? cpuacct_charge+0x1cf/0x350
[   32.518680]  ? trace_hardirqs_on+0x10/0x10
[   32.522897]  ? update_curr+0x28d/0x670
[   32.526770]  ? check_preempt_wakeup+0x3b4/0xce0
[   32.531427]  ? try_to_wake_up+0x6de/0x1100
[   32.535647]  lock_acquire+0x170/0x3f0
[   32.539434]  ? flush_workqueue+0xcb/0x1310
[   32.543675]  flush_workqueue+0xfa/0x1310
[   32.547722]  ? flush_workqueue+0xcb/0x1310
[   32.551945]  ? migrate_swap_stop+0x880/0x880
[   32.556384]  ? lock_acquire+0x170/0x3f0
[   32.560344]  ? lock_downgrade+0x740/0x740
[   32.564480]  ? check_flush_dependency+0x2a0/0x2a0
[   32.569400]  ? wake_up_q+0x82/0xd0
[   32.572947]  nbd_disconnect_and_put+0xc3/0x140
[   32.577530]  nbd_release+0x123/0x150
[   32.581228]  ? nbd_ioctl+0xad0/0xad0
[   32.584927]  __blkdev_put+0x5aa/0x800
[   32.588714]  ? revalidate_disk+0x1f0/0x1f0
[   32.592961]  ? locks_remove_file+0x2cd/0x420
[   32.597360]  ? blkdev_put+0x75/0x4c0
[   32.601059]  ? blkdev_put+0x4c0/0x4c0
[   32.604861]  blkdev_close+0x86/0xb0
[   32.608472]  __fput+0x25f/0x7a0
[   32.611737]  task_work_run+0x11f/0x190
[   32.615611]  exit_to_usermode_loop+0x1ad/0x200
[   32.620181]  do_syscall_64+0x4a3/0x640
[   32.624078]  entry_SYSCALL_64_after_hwframe+0x5e/0xd3
[   32.629261] RIP: 0033:0x7fcddd441270
[   32.632976] RSP: 002b:00007ffde9790638 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   32.640758] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fcddd441270
[   32.648014] RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007
[   32.655282] RBP: 00007fcdde2fb710 R08: 0000000000000045 R09: 0000000000000018
[   32.662539] R10: 0000556d708d9c98 R11: 0000000000000246 R12: 0000000000000000
[   32.669803] R13: 0000556d708d9d20 R14: 0000000000000003 R15: 000000000000000e
[   32.677060] Code: 18 00 00 00 00 48 81 c4 80 01 00 00 44 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 67 2a 00 00 49 81 3c 24 60 d8 2f 8b 0f 84 5f 
[   32.696205] RIP: __lock_acquire+0x1cc/0x3f20 RSP: ffff8880b35b7938
[   32.702511] ---[ end trace 72152a67b3904770 ]---
[   32.707268] Kernel panic - not syncing: Fatal exception
[   32.712851] Kernel Offset: disabled
[   32.716466] Rebooting in 86400 seconds..