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-4,10.128.15.207' (ECDSA) to the list of known hosts. 2017/09/29 11:42:31 parsed 1 programs 2017/09/29 11:42:31 executed programs: 0 2017/09/29 11:42:36 executed programs: 376 2017/09/29 11:42:41 executed programs: 762 2017/09/29 11:42:46 executed programs: 1152 2017/09/29 11:42:51 executed programs: 1539 2017/09/29 11:42:56 executed programs: 1926 2017/09/29 11:43:01 executed programs: 2311 2017/09/29 11:43:06 executed programs: 2695 2017/09/29 11:43:11 executed programs: 3078 2017/09/29 11:43:16 executed programs: 3464 2017/09/29 11:43:21 executed programs: 3853 2017/09/29 11:43:26 executed programs: 4233 2017/09/29 11:43:31 executed programs: 4619 2017/09/29 11:43:36 executed programs: 5001 2017/09/29 11:43:41 executed programs: 5384 2017/09/29 11:43:46 executed programs: 5768 syzkaller login: [ 102.804597] ------------[ cut here ]------------ [ 102.805365] WARNING: CPU: 1 PID: 1138 at kernel/futex.c:818 get_pi_state+0x15b/0x190 [ 102.806422] Kernel panic - not syncing: panic_on_warn set ... [ 102.806422] [ 102.807397] CPU: 1 PID: 1138 Comm: syz-executor4 Not tainted 4.14.0-rc2-mm1+ #10 [ 102.808393] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.809660] Call Trace: [ 102.810029] dump_stack+0x194/0x257 [ 102.810547] ? arch_local_irq_restore+0x53/0x53 [ 102.811231] panic+0x1e4/0x417 [ 102.811671] ? __warn+0x1d9/0x1d9 [ 102.812144] ? show_regs_print_info+0x65/0x65 [ 102.812774] ? get_pi_state+0x15b/0x190 [ 102.813315] __warn+0x1c4/0x1d9 [ 102.813767] ? get_pi_state+0x15b/0x190 [ 102.814312] report_bug+0x211/0x2d0 [ 102.814819] fixup_bug+0x40/0x90 [ 102.815299] do_trap+0x260/0x390 [ 102.815774] do_error_trap+0x120/0x390 [ 102.816309] ? do_trap+0x390/0x390 [ 102.816795] ? get_pi_state+0x15b/0x190 [ 102.817366] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 102.818028] do_invalid_op+0x1b/0x20 [ 102.818537] invalid_op+0x18/0x20 [ 102.819008] RIP: 0010:get_pi_state+0x15b/0x190 [ 102.819623] RSP: 0018:ffff8801d85bf1a0 EFLAGS: 00010097 [ 102.820345] RAX: ffff8801d3e7c180 RBX: 0000000000000000 RCX: 1ffff1003b0b7e39 [ 102.821303] RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff8801ccf1bb80 [ 102.822265] RBP: ffff8801d85bf230 R08: ffff8801d3e7d440 R09: 1ffff1003b0b7e1e [ 102.823237] R10: ffff8801d3e7c180 R11: 0000000000000002 R12: 1ffff1003b0b7e35 [ 102.824217] R13: ffff8801ccf1bb80 R14: 1ffff1003b0b7e39 R15: ffff8801ccf1bc40 [ 102.828099] ? futex_wait_queue_me+0x7e0/0x7e0 [ 102.832672] exit_pi_state_list+0x556/0x7a0 [ 102.836985] ? futex_wait_requeue_pi.constprop.19+0x1300/0x1300 [ 102.843022] ? lock_release+0xd70/0xd70 [ 102.846974] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 102.852834] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 102.857920] ? __might_sleep+0x95/0x190 [ 102.861876] ? __might_fault+0x188/0x1d0 [ 102.865921] ? do_raw_spin_trylock+0x190/0x190 [ 102.870484] mm_release+0x46d/0x590 [ 102.874085] ? do_raw_spin_trylock+0x190/0x190 [ 102.878641] ? mm_access+0x140/0x140 [ 102.882330] ? _raw_spin_unlock_irq+0x27/0x70 [ 102.886802] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 102.891793] ? trace_hardirqs_on+0xd/0x10 [ 102.895920] ? _raw_spin_unlock_irq+0x27/0x70 [ 102.900391] ? acct_collect+0x637/0x800 [ 102.904343] do_exit+0x481/0x1b00 [ 102.907773] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 102.912852] ? trace_hardirqs_on_caller+0x3b0/0x5c0 [ 102.917844] ? mm_update_next_owner+0x930/0x930 [ 102.922483] ? trace_hardirqs_on+0xd/0x10 [ 102.926609] ? hrtimer_try_to_cancel+0x9a/0x5c0 [ 102.931249] ? lock_acquire+0x1d5/0x580 [ 102.935201] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 102.940105] ? do_raw_spin_trylock+0x190/0x190 [ 102.944661] ? fault_in_user_writeable+0x90/0x90 [ 102.949403] ? fixup_pi_state_owner.isra.16+0x980/0x980 [ 102.954750] ? check_noncircular+0x20/0x20 [ 102.958957] ? hrtimer_cancel+0x2e/0x40 [ 102.962906] ? futex_wait_requeue_pi.constprop.19+0x8a8/0x1300 [ 102.968859] ? futex_requeue+0x2370/0x2370 [ 102.973085] ? find_held_lock+0x39/0x1d0 [ 102.977135] ? lock_downgrade+0x990/0x990 [ 102.981256] ? recalc_sigpending_tsk+0x117/0x150 [ 102.985990] ? recalc_sigpending+0x103/0x160 [ 102.990371] ? recalc_sigpending_tsk+0x150/0x150 [ 102.995099] ? get_signal+0x2b2/0x16d0 [ 102.998976] do_group_exit+0x149/0x400 [ 103.002839] ? __lock_is_held+0xbc/0x140 [ 103.006872] ? SyS_exit+0x30/0x30 [ 103.010298] ? _raw_spin_unlock_irq+0x27/0x70 [ 103.014768] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 103.019766] get_signal+0x73f/0x16d0 [ 103.023466] ? ptrace_notify+0x130/0x130 [ 103.027501] ? vmacache_find+0x5f/0x280 [ 103.031447] ? vmacache_update+0xfe/0x130 [ 103.035585] ? exit_robust_list+0x240/0x240 [ 103.039889] ? mm_fault_error+0x2c0/0x2c0 [ 103.044008] ? check_noncircular+0x20/0x20 [ 103.048224] do_signal+0x94/0x1ee0 [ 103.051747] ? find_held_lock+0x39/0x1d0 [ 103.055786] ? setup_sigcontext+0x7d0/0x7d0 [ 103.060091] ? lock_downgrade+0x990/0x990 [ 103.064238] ? lock_release+0xd70/0xd70 [ 103.068186] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 103.074048] ? exit_to_usermode_loop+0x8c/0x310 [ 103.078699] exit_to_usermode_loop+0x214/0x310 [ 103.083258] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 103.088768] ? kasan_check_write+0x14/0x20 [ 103.092991] syscall_return_slowpath+0x42f/0x510 [ 103.097723] ? prepare_exit_to_usermode+0x2d0/0x2d0 [ 103.102715] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 103.107620] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 103.112609] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 103.117348] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 103.122078] RIP: 0033:0x4520a9 [ 103.125240] RSP: 002b:00007fdd6bcaac08 EFLAGS: 00000216 ORIG_RAX: 00000000000000ca [ 103.132926] RAX: 0000000000000000 RBX: 00000000007180b0 RCX: 00000000004520a9 [ 103.140168] RDX: 0000000000000004 RSI: 000080000000000b RDI: 000000002000cffc [ 103.147409] RBP: 00000000000008f0 R08: 0000000020048000 R09: 0000000000000000 [ 103.154650] R10: 0000000020edfff0 R11: 0000000000000216 R12: 00000000004b77c8 [ 103.161892] R13: 00000000ffffffff R14: 000000002000cffc R15: 000080000000000b