INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added 'ci-upstream-mmots-kasan-gce-3,10.128.0.17' (ECDSA) to the list of known hosts.
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syzkaller login: [   50.767089] 
[   50.774566] =============================
[   50.788524] WARNING: suspicious RCU usage
[   50.803124] 4.13.0-mm1+ #7 Not tainted
[   50.807954] -----------------------------
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[   50.812596] ./include/linux/kvm_host.h:481 suspicious rcu_dereference_check() usage!
[   50.825991] 
[   50.825991] other info that might help us debug this:
[   50.825991] 
[   50.834630] 
[   50.834630] rcu_scheduler_active = 2, debug_locks = 1
[   50.856802] no locks held by syzkaller457182/4700.
[   50.865133] 
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[   50.865133] stack backtrace:
[   50.871296] CPU: 0 PID: 4700 Comm: syzkaller457182 Not tainted 4.13.0-mm1+ #7
[   50.878566] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.887909] Call Trace:
[   50.890493]  dump_stack+0x194/0x257
[   50.894124]  ? arch_local_irq_restore+0x53/0x53
[   50.898809]  lockdep_rcu_suspicious+0x123/0x170
[   50.903479]  kvm_dev_ioctl+0x877/0x1840
[   50.907461]  ? install_new_memslots+0x420/0x420
[   50.912151]  ? avc_has_extended_perms+0x7fa/0x12c0
[   50.917077]  ? lock_downgrade+0x990/0x990
[   50.921237]  ? avc_ss_reset+0x110/0x110
[   50.925216]  ? lock_release+0xd70/0xd70
[   50.929189]  ? __lock_is_held+0xbc/0x140
[   50.933290]  ? check_same_owner+0x320/0x320
[   50.937615]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   50.942730]  ? install_new_memslots+0x420/0x420
[   50.947395]  do_vfs_ioctl+0x1b1/0x1530
[   50.951287]  ? ioctl_preallocate+0x2b0/0x2b0
[   50.955692]  ? selinux_capable+0x40/0x40
[   50.959759]  ? lockdep_invariant_state+0xdb/0x120
[   50.964595]  ? syscall_return_slowpath+0x2b3/0x500
[   50.969518]  ? finish_task_switch+0x4c9/0x740
[   50.974017]  ? security_file_ioctl+0x7d/0xb0
[   50.978418]  ? security_file_ioctl+0x89/0xb0
[   50.982833]  SyS_ioctl+0x8f/0xc0
[   50.986217]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   50.990960] RIP: 0033:0x446209
[   50.994137] RSP: 002b:00007f8d3d434dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   51.001839] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000446209
[   51.009097] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003
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[   51.016356] RBP: 0000000000000082 R08: 00007f8d3d435700 R09: 00007f8d3d435700
[   51.023615] R10: 00007f8d3d435700 R11: 0000000000000246 R12: 0000000000000000
[   51.030876] R13: 00007ffcd6a311bf R14: 00007f8d3d4359c0 R15: 0000000000000000
[   51.038338] 
[   51.040451] =============================
[   51.051473] WARNING: suspicious RCU usage
[   51.061519] 4.13.0-mm1+ #7 Not tainted
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[   51.066593] -----------------------------
[   51.077751] ./include/linux/kvm_host.h:575 suspicious rcu_dereference_check() usage!
[   51.094359] 
[   51.094359] other info that might help us debug this:
[   51.094359] 
[   51.104354] 
[   51.104354] rcu_scheduler_active = 2, debug_locks = 1
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[   51.118652] no locks held by syzkaller457182/4700.
[   51.130782] 
[   51.130782] stack backtrace:
[   51.140604] CPU: 0 PID: 4700 Comm: syzkaller457182 Not tainted 4.13.0-mm1+ #7
[   51.147890] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.157234] Call Trace:
[   51.159820]  dump_stack+0x194/0x257
[   51.163444]  ? arch_local_irq_restore+0x53/0x53
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[   51.168128]  lockdep_rcu_suspicious+0x123/0x170
[   51.172799]  kvm_dev_ioctl+0xd21/0x1840
[   51.176784]  ? install_new_memslots+0x420/0x420
[   51.181475]  ? avc_has_extended_perms+0x7fa/0x12c0
[   51.186396]  ? lock_downgrade+0x990/0x990
[   51.190554]  ? avc_ss_reset+0x110/0x110
[   51.194530]  ? lock_release+0xd70/0xd70
[   51.198504]  ? __lock_is_held+0xbc/0x140
[   51.202603]  ? check_same_owner+0x320/0x320
[   51.206926]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   51.212038]  ? install_new_memslots+0x420/0x420
[   51.216714]  do_vfs_ioctl+0x1b1/0x1530
[   51.220604]  ? ioctl_preallocate+0x2b0/0x2b0
[   51.225011]  ? selinux_capable+0x40/0x40
[   51.229081]  ? lockdep_invariant_state+0xdb/0x120
[   51.233917]  ? syscall_return_slowpath+0x2b3/0x500
[   51.238840]  ? finish_task_switch+0x4c9/0x740
[   51.243339]  ? security_file_ioctl+0x7d/0xb0
[   51.247740]  ? security_file_ioctl+0x89/0xb0
[   51.252151]  SyS_ioctl+0x8f/0xc0
[   51.255521]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   51.260265] RIP: 0033:0x446209
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[   51.263442] RSP: 002b:00007f8d3d434dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   51.271147] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000446209
[   51.278407] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003
[   51.285666] RBP: 0000000000000082 R08: 00007f8d3d435700 R09: 00007f8d3d435700
[   51.292925] R10: 00007f8d3d435700 R11: 0000000000000246 R12: 0000000000000000
[   51.300185] R13: 00007ffcd6a311bf R14: 00007f8d3d4359c0 R15: 0000000000000000
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