Warning: Permanently added '10.128.0.117' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 63.199220][ T8542] block nbd0: NBD_DISCONNECT [ 63.218364][ T8542] general protection fault, probably for non-canonical address 0xdffffc0000000027: 0000 [#1] PREEMPT SMP KASAN [ 63.230139][ T8542] KASAN: null-ptr-deref in range [0x0000000000000138-0x000000000000013f] [ 63.239429][ T8542] CPU: 0 PID: 8542 Comm: systemd-udevd Not tainted 5.12.0-syzkaller #0 [ 63.247767][ T8542] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.259922][ T8542] RIP: 0010:__lock_acquire+0xf2/0x6040 [ 63.265439][ T8542] Code: 89 bc 24 80 00 00 00 0f 85 fb 26 00 00 83 3d 48 d8 b5 0c 00 0f 84 2f 12 00 00 83 3d 77 7f 5d 0b 00 74 39 48 89 f8 48 c1 e8 03 <42> 80 3c 00 00 74 1f 48 8b bc 24 80 00 00 00 e8 4a a4 64 00 48 8b [ 63.285030][ T8542] RSP: 0018:ffffc90001caf500 EFLAGS: 00010006 [ 63.291088][ T8542] RAX: 0000000000000027 RBX: 0000000000000000 RCX: 1ffff92000395ec0 [ 63.299235][ T8542] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000138 [ 63.307191][ T8542] RBP: ffffc90001caf890 R08: dffffc0000000000 R09: 0000000000000000 [ 63.315927][ T8542] R10: fffffbfff1c2c29e R11: 0000000000000000 R12: 0000000000000000 [ 63.324266][ T8542] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 [ 63.332234][ T8542] FS: 00007eff431968c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 63.342136][ T8542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.348728][ T8542] CR2: 00007eff422c7360 CR3: 000000002221b000 CR4: 00000000001506f0 [ 63.357048][ T8542] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.365324][ T8542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.374130][ T8542] Call Trace: [ 63.377411][ T8542] ? __bfs+0x700/0x700 [ 63.381498][ T8542] ? print_irqtrace_events+0x220/0x220 [ 63.387472][ T8542] ? trace_lock_acquire+0x180/0x180 [ 63.392664][ T8542] ? trace_lock_acquire+0x180/0x180 [ 63.399511][ T8542] ? lockdep_hardirqs_on_prepare+0x3e2/0x750 [ 63.405485][ T8542] ? rcu_read_lock_sched_held+0x87/0x110 [ 63.415033][ T8542] ? __bpf_trace_rcu_utilization+0x10/0x10 [ 63.421586][ T8542] lock_acquire+0x17f/0x720 [ 63.426140][ T8542] ? flush_workqueue+0x15c/0x1750 [ 63.431177][ T8542] ? memset+0x1f/0x40 [ 63.435250][ T8542] ? read_lock_is_recursive+0x10/0x10 [ 63.440632][ T8542] ? lockdep_init_map_type+0x9f/0x9a0 [ 63.445987][ T8542] ? lockdep_softirqs_off+0x410/0x410 [ 63.451346][ T8542] flush_workqueue+0x178/0x1750 [ 63.456206][ T8542] ? flush_workqueue+0x15c/0x1750 [ 63.461379][ T8542] ? __lock_acquire+0x6040/0x6040 [ 63.466686][ T8542] ? rcu_work_rcufn+0x120/0x120 [ 63.471526][ T8542] ? mutex_unlock+0x10/0x10 [ 63.476087][ T8542] nbd_disconnect_and_put+0x126/0x1f0 [ 63.481489][ T8542] nbd_release+0xf1/0x120 [ 63.485893][ T8542] ? nbd_open+0xb10/0xb10 [ 63.490210][ T8542] __blkdev_put+0x55c/0x6d0 [ 63.494733][ T8542] ? mutex_lock_io_nested+0x60/0x60 [ 63.499939][ T8542] ? blkdev_put+0x440/0x440 [ 63.504439][ T8542] ? mutex_unlock+0x10/0x10 [ 63.508942][ T8542] blkdev_put+0x2cd/0x440 [ 63.513367][ T8542] blkdev_close+0x7a/0xa0 [ 63.517709][ T8542] ? blkdev_open+0x2c0/0x2c0 [ 63.522299][ T8542] __fput+0x352/0x7b0 [ 63.526296][ T8542] task_work_run+0x146/0x1c0 [ 63.530872][ T8542] exit_to_user_mode_prepare+0x10b/0x200 [ 63.536516][ T8542] ? trace_irq_disable_rcuidle+0x11/0x170 [ 63.542252][ T8542] syscall_exit_to_user_mode+0x26/0x70 [ 63.547719][ T8542] do_syscall_64+0x4b/0xb0 [ 63.552123][ T8542] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 63.558000][ T8542] RIP: 0033:0x7eff422dc270 [ 63.562422][ T8542] Code: 73 01 c3 48 8b 0d 38 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 59 c1 20 00 00 75 10 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ee fb ff ff 48 89 04 24 [ 63.582024][ T8542] RSP: 002b:00007ffd36a6eae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 63.590426][ T8542] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007eff422dc270 [ 63.598391][ T8542] RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007 [ 63.606363][ T8542] RBP: 00007eff43196710 R08: 0000000000000045 R09: 0000000000000018 [ 63.614321][ T8542] R10: 000055da0714fee8 R11: 0000000000000246 R12: 0000000000000000 [ 63.622301][ T8542] R13: 000055da07150ef0 R14: 0000000000000003 R15: 000000000000000e [ 63.630264][ T8542] Modules linked in: [ 63.634178][ T8542] ---[ end trace 4d9573b4afe5203b ]--- [ 63.639625][ T8542] RIP: 0010:__lock_acquire+0xf2/0x6040 [ 63.645074][ T8542] Code: 89 bc 24 80 00 00 00 0f 85 fb 26 00 00 83 3d 48 d8 b5 0c 00 0f 84 2f 12 00 00 83 3d 77 7f 5d 0b 00 74 39 48 89 f8 48 c1 e8 03 <42> 80 3c 00 00 74 1f 48 8b bc 24 80 00 00 00 e8 4a a4 64 00 48 8b [ 63.664672][ T8542] RSP: 0018:ffffc90001caf500 EFLAGS: 00010006 [ 63.670798][ T8542] RAX: 0000000000000027 RBX: 0000000000000000 RCX: 1ffff92000395ec0 [ 63.678777][ T8542] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000138 [ 63.686775][ T8542] RBP: ffffc90001caf890 R08: dffffc0000000000 R09: 0000000000000000 [ 63.695082][ T8542] R10: fffffbfff1c2c29e R11: 0000000000000000 R12: 0000000000000000 [ 63.703195][ T8542] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 [ 63.711177][ T8542] FS: 00007eff431968c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 63.721048][ T8542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.727849][ T8542] CR2: 00007eff422c7360 CR3: 000000002221b000 CR4: 00000000001506f0 [ 63.735930][ T8542] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.743907][ T8542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.751874][ T8542] Kernel panic - not syncing: Fatal exception [ 63.758549][ T8542] Kernel Offset: disabled [ 63.762888][ T8542] Rebooting in 86400 seconds..