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


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.10.27' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   51.706896][ T6849] BUG: kernel NULL pointer dereference, address: 0000000000000000
[   51.716879][ T6849] #PF: supervisor instruction fetch in kernel mode
[   51.723370][ T6849] #PF: error_code(0x0010) - not-present page
[   51.729318][ T6849] PGD a6135067 P4D a6135067 PUD 8f09b067 PMD 0 
[   51.735537][ T6849] Oops: 0010 [#1] PREEMPT SMP KASAN
[   51.740718][ T6849] CPU: 0 PID: 6849 Comm: io_wqe_worker-0 Not tainted 5.8.0-syzkaller #0
[   51.749030][ T6849] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.759081][ T6849] RIP: 0010:0x0
[   51.762534][ T6849] Code: Bad RIP value.
[   51.766589][ T6849] RSP: 0018:ffffc90000ff7830 EFLAGS: 00010246
[   51.772625][ T6849] RAX: 1ffffffff110c498 RBX: ffffffff888624c0 RCX: ffff8880a8396e48
[   51.780584][ T6849] RDX: 00000000000000a3 RSI: 0000000020000240 RDI: ffff8880a2d8a780
[   51.788533][ T6849] RBP: ffffc90000ff7958 R08: ffffffff81d601f1 R09: ffffffff81d4df54
[   51.797543][ T6849] R10: 0000000000000021 R11: ffff8880924d2080 R12: 00000000000000a3
[   51.805494][ T6849] R13: 0000000020000240 R14: 0000000000000000 R15: 00000000000000a3
[   51.813459][ T6849] FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   51.822382][ T6849] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   51.828941][ T6849] CR2: ffffffffffffffd6 CR3: 000000009eef8000 CR4: 00000000001506f0
[   51.836894][ T6849] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   51.844848][ T6849] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   51.852802][ T6849] Call Trace:
[   51.856199][ T6849]  loop_rw_iter+0x33a/0x470
[   51.860687][ T6849]  io_write+0x71c/0xe90
[   51.864846][ T6849]  ? mark_lock+0x102/0x1b00
[   51.869386][ T6849]  ? mark_lock+0x7fe/0x1b00
[   51.873967][ T6849]  io_issue_sqe+0x396f/0xb8c0
[   51.878626][ T6849]  ? register_lock_class+0xcca/0x1520
[   51.883998][ T6849]  ? __lock_acquire+0x1161/0x2ab0
[   51.889008][ T6849]  ? mark_lock+0x102/0x1b00
[   51.893501][ T6849]  ? trace_lock_release+0x137/0x1a0
[   51.898674][ T6849]  ? do_raw_spin_unlock+0x134/0x8d0
[   51.903868][ T6849]  io_wq_submit_work+0x35e/0x590
[   51.908811][ T6849]  ? override_creds+0xf5/0x180
[   51.913549][ T6849]  io_worker_handle_work+0xf8f/0x1570
[   51.918900][ T6849]  io_wqe_worker+0x2ff/0x810
[   51.923486][ T6849]  kthread+0x37e/0x3a0
[   51.927528][ T6849]  ? create_io_worker+0x5f0/0x5f0
[   51.932524][ T6849]  ? kthread_blkcg+0xd0/0xd0
[   51.937110][ T6849]  ret_from_fork+0x1f/0x30
[   51.941499][ T6849] Modules linked in:
[   51.945366][ T6849] CR2: 0000000000000000
[   51.950370][ T6849] ---[ end trace bded72c5cb7756d8 ]---
executing program
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[   51.955874][ T6849] RIP: 0010:0x0
[   51.959670][ T6849] Code: Bad RIP value.
[   51.963980][ T6849] RSP: 0018:ffffc90000ff7830 EFLAGS: 00010246
[   51.970331][ T6849] RAX: 1ffffffff110c498 RBX: ffffffff888624c0 RCX: ffff8880a8396e48
[   51.978777][ T6849] RDX: 00000000000000a3 RSI: 0000000020000240 RDI: ffff8880a2d8a780
[   51.986910][ T6849] RBP: ffffc90000ff7958 R08: ffffffff81d601f1 R09: ffffffff81d4df54
[   51.995389][ T6849] R10: 0000000000000021 R11: ffff8880924d2080 R12: 00000000000000a3
executing program
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[   52.003763][ T6849] R13: 0000000020000240 R14: 0000000000000000 R15: 00000000000000a3
[   52.012520][ T6849] FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   52.024412][ T6849] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   52.031410][ T6849] CR2: ffffffffffffffd6 CR3: 000000009eef8000 CR4: 00000000001506f0
[   52.039806][ T6849] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   52.048251][ T6849] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   52.056236][ T6849] Kernel panic - not syncing: Fatal exception
[   52.063345][ T6849] Kernel Offset: disabled
[   52.067660][ T6849] Rebooting in 86400 seconds..