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-next-kasan-gce-5,10.128.0.58' (ECDSA) to the list of known hosts. 2017/10/01 01:48:32 parsed 1 programs 2017/10/01 01:48:32 executed programs: 0 2017/10/01 01:48:37 executed programs: 504 2017/10/01 01:48:42 executed programs: 1024 2017/10/01 01:48:47 executed programs: 1543 syzkaller login: [ 59.573318] ------------[ cut here ]------------ [ 59.578120] WARNING: CPU: 0 PID: 14290 at kernel/futex.c:818 get_pi_state+0x15b/0x190 [ 59.586058] Kernel panic - not syncing: panic_on_warn set ... [ 59.586058] [ 59.593394] CPU: 0 PID: 14290 Comm: syz-executor7 Not tainted 4.14.0-rc2-next-20170929+ #32 [ 59.601869] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.611195] Call Trace: [ 59.613757] dump_stack+0x194/0x257 [ 59.617362] ? arch_local_irq_restore+0x53/0x53 [ 59.622021] panic+0x1e4/0x41c [ 59.625190] ? refcount_error_report+0x214/0x214 [ 59.629926] ? show_regs_print_info+0x65/0x65 [ 59.634423] ? get_pi_state+0x15b/0x190 [ 59.638369] __warn+0x1c4/0x1e0 [ 59.641624] ? get_pi_state+0x15b/0x190 [ 59.645576] report_bug+0x211/0x2d0 [ 59.649183] fixup_bug+0x40/0x90 [ 59.652524] do_trap+0x260/0x390 [ 59.655881] do_error_trap+0x120/0x390 [ 59.659750] ? do_trap+0x390/0x390 [ 59.663266] ? get_pi_state+0x15b/0x190 [ 59.667233] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 59.672059] do_invalid_op+0x1b/0x20 [ 59.675752] invalid_op+0x18/0x20 [ 59.679180] RIP: 0010:get_pi_state+0x15b/0x190 [ 59.683732] RSP: 0018:ffff8801c957f1a0 EFLAGS: 00010097 [ 59.689075] RAX: ffff8801c8e5e380 RBX: 0000000000000000 RCX: 1ffff100392afe39 [ 59.696320] RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff8801c95ff840 [ 59.703565] RBP: ffff8801c957f230 R08: ffff8801c8e5f640 R09: 1ffff100392afe1e [ 59.710816] R10: ffff8801c8e5e380 R11: 0000000000000002 R12: 1ffff100392afe35 [ 59.718059] R13: ffff8801c95ff840 R14: 1ffff100392afe39 R15: ffff8801c95ff900 [ 59.725331] ? futex_wait_queue_me+0x7e0/0x7e0 [ 59.729905] exit_pi_state_list+0x556/0x7a0 [ 59.734220] ? futex_wait_requeue_pi.constprop.19+0x1300/0x1300 [ 59.740255] ? lock_release+0xd70/0xd70 [ 59.744209] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 59.750073] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 59.755160] ? __might_sleep+0x95/0x190 [ 59.759121] ? __might_fault+0x188/0x1d0 [ 59.763165] ? do_raw_spin_trylock+0x190/0x190 [ 59.767725] mm_release+0x46d/0x590 [ 59.771323] ? do_raw_spin_trylock+0x190/0x190 [ 59.775877] ? mm_access+0x140/0x140 [ 59.779563] ? _raw_spin_unlock_irq+0x27/0x70 [ 59.784042] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 59.789033] ? trace_hardirqs_on+0xd/0x10 [ 59.793153] ? _raw_spin_unlock_irq+0x27/0x70 [ 59.797623] ? acct_collect+0x637/0x800 [ 59.801579] do_exit+0x481/0x1b00 [ 59.805006] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 59.810086] ? trace_hardirqs_on_caller+0x390/0x5c0 [ 59.815074] ? mm_update_next_owner+0x930/0x930 [ 59.819714] ? trace_hardirqs_on+0xd/0x10 [ 59.823842] ? hrtimer_try_to_cancel+0x9a/0x5c0 [ 59.828481] ? lock_acquire+0x1d5/0x580 [ 59.832434] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 59.837346] ? do_raw_spin_trylock+0x190/0x190 [ 59.841904] ? fault_in_user_writeable+0x90/0x90 [ 59.846645] ? fixup_pi_state_owner.isra.16+0x980/0x980 [ 59.851992] ? check_noncircular+0x20/0x20 [ 59.856198] ? hrtimer_cancel+0x2e/0x40 [ 59.860147] ? futex_wait_requeue_pi.constprop.19+0x8a8/0x1300 [ 59.866099] ? futex_requeue+0x2370/0x2370 [ 59.870329] ? find_held_lock+0x39/0x1d0 [ 59.874382] ? lock_downgrade+0x990/0x990 [ 59.878508] ? recalc_sigpending_tsk+0x117/0x150 [ 59.883238] ? recalc_sigpending+0x103/0x160 [ 59.887621] ? recalc_sigpending_tsk+0x150/0x150 [ 59.892346] ? get_signal+0x2b2/0x16d0 [ 59.896222] do_group_exit+0x149/0x400 [ 59.900082] ? __lock_is_held+0xbc/0x140 [ 59.904115] ? SyS_exit+0x30/0x30 [ 59.907545] ? _raw_spin_unlock_irq+0x27/0x70 [ 59.912019] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 59.917013] get_signal+0x73f/0x16d0 [ 59.920715] ? ptrace_notify+0x130/0x130 [ 59.924775] ? exit_robust_list+0x240/0x240 [ 59.929078] ? check_noncircular+0x20/0x20 [ 59.933295] do_signal+0x94/0x1ee0 [ 59.936817] ? find_held_lock+0x39/0x1d0 [ 59.940854] ? setup_sigcontext+0x7d0/0x7d0 [ 59.945157] ? lock_downgrade+0x990/0x990 [ 59.949301] ? lock_release+0xd70/0xd70 [ 59.953248] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 59.959102] ? lock_acquire+0x1d5/0x580 [ 59.963047] ? finish_task_switch+0x1aa/0x740 [ 59.967517] ? exit_to_usermode_loop+0x8c/0x310 [ 59.972168] exit_to_usermode_loop+0x214/0x310 [ 59.976728] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 59.982238] ? kasan_check_write+0x14/0x20 [ 59.986459] syscall_return_slowpath+0x42f/0x510 [ 59.991192] ? prepare_exit_to_usermode+0x2d0/0x2d0 [ 59.996182] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 60.001089] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.006078] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 60.010820] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 60.015545] RIP: 0033:0x4520a9 [ 60.018709] RSP: 002b:00007f5f0b3c5c08 EFLAGS: 00000216 ORIG_RAX: 00000000000000ca [ 60.026394] RAX: 0000000000000000 RBX: 00000000007180b0 RCX: 00000000004520a9 [ 60.033635] RDX: 0000000000000004 RSI: 000080000000000b RDI: 000000002000cffc [ 60.040876] RBP: 00000000000008f0 R08: 0000000020048000 R09: 0000000000000000 [ 60.048117] R10: 000000002000b000 R11: 0000000000000216 R12: 00000000004b77c8 [ 60.055358] R13: 00000000ffffffff R14: 000000002000cffc R15: 000080000000000b