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-0,10.128.0.14' (ECDSA) to the list of known hosts.
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syzkaller login: [   52.854660] 
[   52.858179] =============================
[   52.870999] WARNING: suspicious RCU usage
[   52.888348] 4.13.0-mm1+ #7 Not tainted
[   52.895381] -----------------------------
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[   52.900213] ./include/linux/kvm_host.h:481 suspicious rcu_dereference_check() usage!
[   52.913270] 
[   52.913270] other info that might help us debug this:
[   52.913270] 
[   52.925596] 
[   52.925596] rcu_scheduler_active = 2, debug_locks = 1
[   52.934491] no locks held by syzkaller036513/6730.
[   52.944873] 
[   52.944873] stack backtrace:
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[   52.962397] CPU: 0 PID: 6730 Comm: syzkaller036513 Not tainted 4.13.0-mm1+ #7
[   52.969681] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.979024] Call Trace:
[   52.981614]  dump_stack+0x194/0x257
[   52.985247]  ? arch_local_irq_restore+0x53/0x53
[   52.989938]  lockdep_rcu_suspicious+0x123/0x170
[   52.994609]  kvm_dev_ioctl+0x877/0x1840
[   52.998600]  ? install_new_memslots+0x420/0x420
[   53.003291]  ? avc_has_extended_perms+0x7fa/0x12c0
[   53.008213]  ? lock_downgrade+0x990/0x990
[   53.012372]  ? avc_ss_reset+0x110/0x110
[   53.016349]  ? lock_release+0xd70/0xd70
[   53.020324]  ? __lock_is_held+0xbc/0x140
[   53.024427]  ? check_same_owner+0x320/0x320
[   53.028750]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   53.033863]  ? install_new_memslots+0x420/0x420
[   53.038528]  do_vfs_ioctl+0x1b1/0x1530
[   53.042422]  ? ioctl_preallocate+0x2b0/0x2b0
[   53.046832]  ? selinux_capable+0x40/0x40
[   53.050903]  ? lockdep_invariant_state+0xdb/0x120
[   53.055745]  ? syscall_return_slowpath+0x2b3/0x500
[   53.060669]  ? finish_task_switch+0x4c9/0x740
[   53.065171]  ? security_file_ioctl+0x7d/0xb0
[   53.069578]  ? security_file_ioctl+0x89/0xb0
[   53.073989]  SyS_ioctl+0x8f/0xc0
[   53.077362]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   53.082108] RIP: 0033:0x446209
[   53.085288] RSP: 002b:00007f27a92c5dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   53.092995] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000446209
[   53.100258] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000004
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[   53.107521] RBP: 0000000000000082 R08: 00007f27a92c6700 R09: 00007f27a92c6700
[   53.114787] R10: 00007f27a92c6700 R11: 0000000000000246 R12: 0000000000000000
[   53.122050] R13: 00007ffcacfe689f R14: 00007f27a92c69c0 R15: 0000000000000000
[   53.129627] 
[   53.140908] =============================
[   53.145447] WARNING: suspicious RCU usage
[   53.157271] 4.13.0-mm1+ #7 Not tainted
[   53.164961] -----------------------------
[   53.172192] ./include/linux/kvm_host.h:575 suspicious rcu_dereference_check() usage!
[   53.182471] 
[   53.182471] other info that might help us debug this:
[   53.182471] 
[   53.191563] 
[   53.191563] rcu_scheduler_active = 2, debug_locks = 1
[   53.214648] no locks held by syzkaller036513/6730.
[   53.219659] 
[   53.219659] stack backtrace:
[   53.224212] CPU: 0 PID: 6730 Comm: syzkaller036513 Not tainted 4.13.0-mm1+ #7
[   53.231474] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.240819] Call Trace:
[   53.243403]  dump_stack+0x194/0x257
[   53.247034]  ? arch_local_irq_restore+0x53/0x53
[   53.251722]  lockdep_rcu_suspicious+0x123/0x170
[   53.256391]  kvm_dev_ioctl+0xd21/0x1840
[   53.260377]  ? install_new_memslots+0x420/0x420
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[   53.265067]  ? avc_has_extended_perms+0x7fa/0x12c0
[   53.270018]  ? lock_downgrade+0x990/0x990
[   53.274180]  ? avc_ss_reset+0x110/0x110
[   53.278159]  ? lock_release+0xd70/0xd70
[   53.282137]  ? __lock_is_held+0xbc/0x140
[   53.286236]  ? check_same_owner+0x320/0x320
[   53.290564]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   53.295672]  ? install_new_memslots+0x420/0x420
[   53.300333]  do_vfs_ioctl+0x1b1/0x1530
[   53.304229]  ? ioctl_preallocate+0x2b0/0x2b0
[   53.308638]  ? selinux_capable+0x40/0x40
[   53.312704]  ? lockdep_invariant_state+0xdb/0x120
[   53.317548]  ? syscall_return_slowpath+0x2b3/0x500
[   53.322478]  ? finish_task_switch+0x4c9/0x740
[   53.326982]  ? security_file_ioctl+0x7d/0xb0
[   53.331381]  ? security_file_ioctl+0x89/0xb0
[   53.335798]  SyS_ioctl+0x8f/0xc0
[   53.339171]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   53.343915] RIP: 0033:0x446209
[   53.347095] RSP: 002b:00007f27a92c5dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   53.354803] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000446209
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[   53.362067] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000004
[   53.369330] RBP: 0000000000000082 R08: 00007f27a92c6700 R09: 00007f27a92c6700
[   53.376594] R10: 00007f27a92c6700 R11: 0000000000000246 R12: 0000000000000000
[   53.383855] R13: 00007ffcacfe689f R14: 00007f27a92c69c0 R15: 0000000000000000
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