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-3,10.128.0.52' (ECDSA) to the list of known hosts. 2017/10/01 18:09:33 parsed 1 programs 2017/10/01 18:09:33 executed programs: 0 syzkaller login: [ 37.855116] ------------[ cut here ]------------ [ 37.859917] WARNING: CPU: 1 PID: 3748 at kernel/futex.c:818 get_pi_state+0x15b/0x190 [ 37.867769] Kernel panic - not syncing: panic_on_warn set ... [ 37.867769] [ 37.875106] CPU: 1 PID: 3748 Comm: syz-executor1 Not tainted 4.14.0-rc2-mm1+ #11 [ 37.882611] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.891937] Call Trace: [ 37.894500] dump_stack+0x194/0x257 [ 37.898108] ? arch_local_irq_restore+0x53/0x53 [ 37.902768] panic+0x1e4/0x41c [ 37.905934] ? refcount_error_report+0x214/0x214 [ 37.910660] ? show_regs_print_info+0x65/0x65 [ 37.915149] ? get_pi_state+0x15b/0x190 [ 37.919096] __warn+0x1c4/0x1e0 [ 37.922349] ? get_pi_state+0x15b/0x190 [ 37.926302] report_bug+0x211/0x2d0 [ 37.929913] fixup_bug+0x40/0x90 [ 37.933255] do_trap+0x260/0x390 [ 37.936606] do_error_trap+0x120/0x390 [ 37.940474] ? do_trap+0x390/0x390 [ 37.943989] ? get_pi_state+0x15b/0x190 [ 37.947951] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.952774] do_invalid_op+0x1b/0x20 [ 37.956462] invalid_op+0x18/0x20 [ 37.959886] RIP: 0010:get_pi_state+0x15b/0x190 [ 37.964440] RSP: 0018:ffff8801cb4ef1a0 EFLAGS: 00010097 [ 37.969779] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff1003969de39 [ 37.977021] RDX: ffff8801d18b4080 RSI: 0000000000000003 RDI: ffff8801ce1205c0 [ 37.984262] RBP: ffff8801cb4ef230 R08: ffff8801d18b5340 R09: 1ffff1003969de1e [ 37.991506] R10: ffff8801d18b4080 R11: 0000000000000002 R12: 1ffff1003969de35 [ 37.998749] R13: ffff8801ce1205c0 R14: 1ffff1003969de39 R15: ffff8801ce120680 [ 38.006023] ? futex_wait_queue_me+0x7e0/0x7e0 [ 38.010596] exit_pi_state_list+0x556/0x7a0 [ 38.014907] ? futex_wait_requeue_pi.constprop.19+0x1300/0x1300 [ 38.020942] ? lock_release+0xd70/0xd70 [ 38.024898] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 38.030755] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 38.035841] ? __might_sleep+0x95/0x190 [ 38.039796] ? __might_fault+0x188/0x1d0 [ 38.043838] ? do_raw_spin_trylock+0x190/0x190 [ 38.048400] mm_release+0x46d/0x590 [ 38.051997] ? do_raw_spin_trylock+0x190/0x190 [ 38.056564] ? mm_access+0x140/0x140 [ 38.060250] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.064723] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.069711] ? trace_hardirqs_on+0xd/0x10 [ 38.073832] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.078299] ? acct_collect+0x637/0x800 [ 38.082253] do_exit+0x481/0x1b00 [ 38.085680] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 38.090758] ? trace_hardirqs_on_caller+0x3f0/0x5c0 [ 38.095747] ? mm_update_next_owner+0x930/0x930 [ 38.100387] ? trace_hardirqs_on+0xd/0x10 [ 38.104515] ? hrtimer_try_to_cancel+0x9a/0x5c0 [ 38.109160] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 38.114064] ? do_raw_spin_trylock+0x190/0x190 [ 38.118620] ? fault_in_user_writeable+0x90/0x90 [ 38.123359] ? fixup_pi_state_owner.isra.16+0x980/0x980 [ 38.128706] ? check_noncircular+0x20/0x20 [ 38.132911] ? hrtimer_cancel+0x2e/0x40 [ 38.136859] ? futex_wait_requeue_pi.constprop.19+0x8a8/0x1300 [ 38.142813] ? futex_requeue+0x2370/0x2370 [ 38.147034] ? find_held_lock+0x39/0x1d0 [ 38.151086] ? lock_downgrade+0x990/0x990 [ 38.155209] ? recalc_sigpending_tsk+0x117/0x150 [ 38.159941] ? recalc_sigpending+0x103/0x160 [ 38.164324] ? recalc_sigpending_tsk+0x150/0x150 [ 38.169052] ? get_signal+0x2b2/0x16d0 [ 38.172929] do_group_exit+0x149/0x400 [ 38.176788] ? __lock_is_held+0xbc/0x140 [ 38.180821] ? SyS_exit+0x30/0x30 [ 38.184245] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.188717] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.193711] get_signal+0x73f/0x16d0 [ 38.197410] ? ptrace_notify+0x130/0x130 [ 38.201445] ? vmacache_find+0x5f/0x280 [ 38.205392] ? vmacache_update+0xfe/0x130 [ 38.209529] ? exit_robust_list+0x240/0x240 [ 38.213831] ? mm_fault_error+0x2c0/0x2c0 [ 38.217958] do_signal+0x94/0x1ee0 [ 38.221486] ? find_held_lock+0x39/0x1d0 [ 38.225526] ? setup_sigcontext+0x7d0/0x7d0 [ 38.229830] ? lock_downgrade+0x990/0x990 [ 38.233975] ? lock_release+0xd70/0xd70 [ 38.237923] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 38.243783] ? exit_to_usermode_loop+0x8c/0x310 [ 38.248435] exit_to_usermode_loop+0x214/0x310 [ 38.252995] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 38.258506] ? kasan_check_write+0x14/0x20 [ 38.262726] syscall_return_slowpath+0x42f/0x510 [ 38.267457] ? prepare_exit_to_usermode+0x2d0/0x2d0 [ 38.272450] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 38.277358] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.282347] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 38.287084] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 38.291811] RIP: 0033:0x4520a9 [ 38.294972] RSP: 002b:00007f3862e4cc08 EFLAGS: 00000216 ORIG_RAX: 00000000000000ca [ 38.302656] RAX: 0000000000000000 RBX: 00000000007180b0 RCX: 00000000004520a9 [ 38.309898] RDX: 0000000000000004 RSI: 000080000000000b RDI: 000000002000cffc [ 38.317140] RBP: 00000000000008f0 R08: 0000000020048000 R09: 0000000000000000 [ 38.324381] R10: 0000000020edfff0 R11: 0000000000000216 R12: 00000000004b77c8 [ 38.331625] R13: 00000000ffffffff R14: 000000002000cffc R15: 000080000000000b