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-5,10.128.15.204' (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
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: [   49.455569] 
[   49.458076] =============================
[   49.486273] WARNING: suspicious RCU usage
[   49.495596] 4.13.0+ #73 Not tainted
[   49.500524] -----------------------------
executing program
executing program
executing program
[   49.505183] ./include/linux/kvm_host.h:481 suspicious rcu_dereference_check() usage!
[   49.514834] 
[   49.514834] other info that might help us debug this:
[   49.514834] 
[   49.526160] 
[   49.526160] rcu_scheduler_active = 2, debug_locks = 1
[   49.544121] no locks held by syzkaller628369/3448.
executing program
executing program
executing program
[   49.562938] 
[   49.562938] stack backtrace:
[   49.572785] CPU: 1 PID: 3448 Comm: syzkaller628369 Not tainted 4.13.0+ #73
[   49.579796] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.589121] Call Trace:
[   49.591683]  dump_stack+0x194/0x257
[   49.595285]  ? arch_local_irq_restore+0x53/0x53
[   49.599940]  lockdep_rcu_suspicious+0x123/0x170
[   49.604590]  kvm_dev_ioctl+0x877/0x1840
[   49.608546]  ? install_new_memslots+0x420/0x420
[   49.613205]  ? avc_has_extended_perms+0x7fa/0x12c0
[   49.618108]  ? lock_downgrade+0x990/0x990
[   49.622238]  ? avc_ss_reset+0x110/0x110
[   49.626190]  ? lock_release+0xd70/0xd70
[   49.630143]  ? __lock_is_held+0xbc/0x140
[   49.634204]  ? check_same_owner+0x320/0x320
[   49.638497]  ? rcu_pm_notify+0xc0/0xc0
[   49.642370]  ? install_new_memslots+0x420/0x420
[   49.647024]  do_vfs_ioctl+0x1b1/0x1530
[   49.650890]  ? ioctl_preallocate+0x2b0/0x2b0
[   49.655275]  ? selinux_capable+0x40/0x40
[   49.659310]  ? __lock_acquire+0x4231/0x4620
executing program
[   49.663609]  ? lockdep_invariant_state+0xbb/0x120
[   49.668428]  ? syscall_return_slowpath+0x2b3/0x500
[   49.673330]  ? finish_task_switch+0x1aa/0x740
[   49.677812]  ? security_file_ioctl+0x7d/0xb0
[   49.682201]  ? security_file_ioctl+0x89/0xb0
[   49.686589]  SyS_ioctl+0x8f/0xc0
[   49.689936]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   49.694671] RIP: 0033:0x4490c9
[   49.697836] RSP: 002b:00007f6a236c7dc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[   49.705521] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004490c9
executing program
executing program
executing program
[   49.712764] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000005
[   49.720010] RBP: 0000000000000082 R08: 00007f6a236c8700 R09: 00007f6a236c8700
[   49.727254] R10: 00007f6a236c8700 R11: 0000000000000202 R12: 0000000000000000
[   49.734497] R13: 00007ffe3e38471f R14: 00007f6a236c89c0 R15: 0000000000000000
[   49.741967] 
[   49.746920] =============================
[   49.757401] WARNING: suspicious RCU usage
[   49.771409] 4.13.0+ #73 Not tainted
[   49.788073] -----------------------------
[   49.802392] ./include/linux/kvm_host.h:575 suspicious rcu_dereference_check() usage!
executing program
executing program
executing program
executing program
executing program
[   49.821384] 
[   49.821384] other info that might help us debug this:
[   49.821384] 
[   49.830192] 
[   49.830192] rcu_scheduler_active = 2, debug_locks = 1
[   49.840552] no locks held by syzkaller628369/3448.
[   49.848641] 
[   49.848641] stack backtrace:
[   49.854504] CPU: 1 PID: 3448 Comm: syzkaller628369 Not tainted 4.13.0+ #73
[   49.861500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
executing program
[   49.870837] Call Trace:
[   49.873400]  dump_stack+0x194/0x257
[   49.877004]  ? arch_local_irq_restore+0x53/0x53
[   49.881666]  lockdep_rcu_suspicious+0x123/0x170
[   49.886311]  kvm_dev_ioctl+0xd21/0x1840
[   49.890266]  ? install_new_memslots+0x420/0x420
[   49.894925]  ? avc_has_extended_perms+0x7fa/0x12c0
[   49.899827]  ? lock_downgrade+0x990/0x990
[   49.903958]  ? avc_ss_reset+0x110/0x110
[   49.907908]  ? lock_release+0xd70/0xd70
[   49.911858]  ? __lock_is_held+0xbc/0x140
[   49.915917]  ? check_same_owner+0x320/0x320
[   49.920219]  ? rcu_pm_notify+0xc0/0xc0
[   49.924094]  ? install_new_memslots+0x420/0x420
[   49.928740]  do_vfs_ioctl+0x1b1/0x1530
[   49.932617]  ? ioctl_preallocate+0x2b0/0x2b0
[   49.937000]  ? selinux_capable+0x40/0x40
[   49.941046]  ? __lock_acquire+0x4231/0x4620
[   49.945344]  ? lockdep_invariant_state+0xbb/0x120
[   49.950156]  ? syscall_return_slowpath+0x2b3/0x500
[   49.955056]  ? finish_task_switch+0x1aa/0x740
[   49.959534]  ? security_file_ioctl+0x7d/0xb0
[   49.963918]  ? security_file_ioctl+0x89/0xb0
[   49.968302]  SyS_ioctl+0x8f/0xc0
executing program
[   49.971646]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   49.976373] RIP: 0033:0x4490c9
[   49.979535] RSP: 002b:00007f6a236c7dc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[   49.987215] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004490c9
[   49.994458] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000005
[   50.001701] RBP: 0000000000000082 R08: 00007f6a236c8700 R09: 00007f6a236c8700
[   50.008944] R10: 00007f6a236c8700 R11: 0000000000000202 R12: 0000000000000000
executing program
executing program
[   50.016184] R13: 00007ffe3e38471f R14: 00007f6a236c89c0 R15: 0000000000000000
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
executing program
executing program