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-kasan-gce-8,10.128.0.6' (ECDSA) to the list of known hosts.
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syzkaller login: [   65.902241] 
[   65.904447] =============================
[   65.905654] WARNING: suspicious RCU usage
[   65.907405] 4.13.0-rc5+ #42 Not tainted
[   65.908213] -----------------------------
[   65.908924] ./include/linux/kvm_host.h:481 suspicious rcu_dereference_check() usage!
[   65.926850] 
[   65.926850] other info that might help us debug this:
[   65.926850] 
[   65.950129] 
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[   65.950129] rcu_scheduler_active = 2, debug_locks = 1
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[   65.990123] no locks held by syzkaller982846/13073.
[   66.022566] 
[   66.022566] stack backtrace:
[   66.028617] CPU: 1 PID: 13073 Comm: syzkaller982846 Not tainted 4.13.0-rc5+ #42
[   66.036060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.045403] Call Trace:
[   66.047985]  dump_stack+0x194/0x257
[   66.051610]  ? arch_local_irq_restore+0x53/0x53
[   66.056289]  lockdep_rcu_suspicious+0x123/0x170
[   66.060956]  kvm_dev_ioctl+0x877/0x1840
[   66.064920]  ? lock_downgrade+0x990/0x990
[   66.069071]  ? install_new_memslots+0x420/0x420
[   66.073759]  ? avc_has_extended_perms+0x7fa/0x12c0
[   66.078675]  ? find_held_lock+0x35/0x1d0
[   66.082741]  ? avc_ss_reset+0x110/0x110
[   66.086705]  ? lock_downgrade+0x990/0x990
[   66.090849]  ? lock_release+0xa40/0xa40
[   66.094820]  ? __lock_is_held+0xb6/0x140
[   66.098914]  ? check_same_owner+0x320/0x320
[   66.103234]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   66.108344]  ? install_new_memslots+0x420/0x420
[   66.113005]  do_vfs_ioctl+0x1b1/0x1520
[   66.116894]  ? ioctl_preallocate+0x2b0/0x2b0
[   66.121296]  ? selinux_capable+0x40/0x40
[   66.125364]  ? syscall_return_slowpath+0x22f/0x450
[   66.130298]  ? security_file_ioctl+0x7d/0xb0
[   66.134694]  ? security_file_ioctl+0x89/0xb0
[   66.139101]  SyS_ioctl+0x8f/0xc0
[   66.142469]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   66.147233] RIP: 0033:0x4491d9
[   66.150410] RSP: 002b:00007f6639e9cdc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[   66.158105] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004491d9
[   66.165363] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000005
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[   66.172620] RBP: 0000000000000086 R08: 00007f6639e9d700 R09: 00007f6639e9d700
[   66.179875] R10: 00007f6639e9d700 R11: 0000000000000202 R12: 0000000000000000
[   66.187129] R13: 00007ffc6022c38f R14: 00007f6639e9d9c0 R15: 0000000000000000
[   66.194620] 
[   66.202854] =============================
[   66.207052] WARNING: suspicious RCU usage
[   66.212318] 4.13.0-rc5+ #42 Not tainted
[   66.216329] -----------------------------
executing program
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[   66.224552] ./include/linux/kvm_host.h:575 suspicious rcu_dereference_check() usage!
[   66.234863] 
[   66.234863] other info that might help us debug this:
[   66.234863] 
[   66.244276] 
[   66.244276] rcu_scheduler_active = 2, debug_locks = 1
[   66.266981] no locks held by syzkaller982846/13073.
[   66.300820] 
[   66.300820] stack backtrace:
[   66.305402] CPU: 1 PID: 13073 Comm: syzkaller982846 Not tainted 4.13.0-rc5+ #42
[   66.312830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.322167] Call Trace:
[   66.324748]  dump_stack+0x194/0x257
[   66.328374]  ? arch_local_irq_restore+0x53/0x53
[   66.333051]  lockdep_rcu_suspicious+0x123/0x170
[   66.337719]  kvm_dev_ioctl+0xd21/0x1840
[   66.341680]  ? lock_downgrade+0x990/0x990
[   66.345830]  ? install_new_memslots+0x420/0x420
[   66.350523]  ? avc_has_extended_perms+0x7fa/0x12c0
[   66.355441]  ? find_held_lock+0x35/0x1d0
[   66.359517]  ? avc_ss_reset+0x110/0x110
[   66.363476]  ? lock_downgrade+0x990/0x990
[   66.367637]  ? lock_release+0xa40/0xa40
[   66.371603]  ? __lock_is_held+0xb6/0x140
[   66.375696]  ? check_same_owner+0x320/0x320
[   66.380015]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   66.385123]  ? install_new_memslots+0x420/0x420
[   66.389780]  do_vfs_ioctl+0x1b1/0x1520
[   66.393665]  ? ioctl_preallocate+0x2b0/0x2b0
[   66.398066]  ? selinux_capable+0x40/0x40
[   66.402134]  ? syscall_return_slowpath+0x22f/0x450
[   66.407108]  ? security_file_ioctl+0x7d/0xb0
[   66.411508]  ? security_file_ioctl+0x89/0xb0
[   66.415911]  SyS_ioctl+0x8f/0xc0
[   66.419271]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   66.424013] RIP: 0033:0x4491d9
[   66.427191] RSP: 002b:00007f6639e9cdc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[   66.434888] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004491d9
[   66.442145] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000005
executing program
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[   66.449402] RBP: 0000000000000086 R08: 00007f6639e9d700 R09: 00007f6639e9d700
[   66.456655] R10: 00007f6639e9d700 R11: 0000000000000202 R12: 0000000000000000
[   66.463910] R13: 00007ffc6022c38f R14: 00007f6639e9d9c0 R15: 0000000000000000
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