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-9,10.128.0.36' (ECDSA) to the list of known hosts. 2017/09/29 15:05:29 parsed 1 programs 2017/09/29 15:05:29 executed programs: 0 2017/09/29 15:05:34 executed programs: 382 2017/09/29 15:05:39 executed programs: 756 syzkaller login: [ 142.715741] ------------[ cut here ]------------ [ 142.720554] WARNING: CPU: 0 PID: 7249 at kernel/futex.c:818 get_pi_state+0x15b/0x190 [ 142.728408] Kernel panic - not syncing: panic_on_warn set ... [ 142.728408] [ 142.735743] CPU: 0 PID: 7249 Comm: syz-executor0 Not tainted 4.14.0-rc2-mm1+ #10 [ 142.743247] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 142.752572] Call Trace: [ 142.755134] dump_stack+0x194/0x257 [ 142.758739] ? arch_local_irq_restore+0x53/0x53 [ 142.763399] panic+0x1e4/0x417 [ 142.766568] ? __warn+0x1d9/0x1d9 [ 142.769993] ? show_regs_print_info+0x65/0x65 [ 142.774482] ? get_pi_state+0x15b/0x190 [ 142.778430] __warn+0x1c4/0x1d9 [ 142.781687] ? get_pi_state+0x15b/0x190 [ 142.785638] report_bug+0x211/0x2d0 [ 142.789248] fixup_bug+0x40/0x90 [ 142.792588] do_trap+0x260/0x390 [ 142.795942] do_error_trap+0x120/0x390 [ 142.799820] ? do_trap+0x390/0x390 [ 142.803335] ? get_pi_state+0x15b/0x190 [ 142.807297] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 142.812140] do_invalid_op+0x1b/0x20 [ 142.815833] invalid_op+0x18/0x20 [ 142.819259] RIP: 0010:get_pi_state+0x15b/0x190 [ 142.823811] RSP: 0018:ffff8801c1e771a0 EFLAGS: 00010097 [ 142.829151] RAX: ffff8801c1a3a140 RBX: 0000000000000000 RCX: 1ffff100383cee39 [ 142.836394] RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff8801c15ea5c0 [ 142.843647] RBP: ffff8801c1e77230 R08: ffff8801c1a3b400 R09: 1ffff100383cee1e [ 142.850894] R10: ffff8801c1a3a140 R11: 0000000000000002 R12: 1ffff100383cee35 [ 142.858136] R13: ffff8801c15ea5c0 R14: 1ffff100383cee39 R15: ffff8801c15ea680 [ 142.865418] ? futex_wait_queue_me+0x7e0/0x7e0 [ 142.869991] exit_pi_state_list+0x556/0x7a0 [ 142.874303] ? futex_wait_requeue_pi.constprop.19+0x1300/0x1300 [ 142.880346] ? lock_release+0xd70/0xd70 [ 142.884301] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 142.890161] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 142.895248] ? __might_sleep+0x95/0x190 [ 142.899202] ? __might_fault+0x188/0x1d0 [ 142.903245] ? do_raw_spin_trylock+0x190/0x190 [ 142.907808] mm_release+0x46d/0x590 [ 142.911407] ? do_raw_spin_trylock+0x190/0x190 [ 142.915962] ? mm_access+0x140/0x140 [ 142.919652] ? _raw_spin_unlock_irq+0x27/0x70 [ 142.924130] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 142.929123] ? trace_hardirqs_on+0xd/0x10 [ 142.933244] ? _raw_spin_unlock_irq+0x27/0x70 [ 142.937712] ? acct_collect+0x637/0x800 [ 142.941668] do_exit+0x481/0x1b00 [ 142.945095] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 142.950175] ? trace_hardirqs_on_caller+0x3b0/0x5c0 [ 142.955164] ? mm_update_next_owner+0x930/0x930 [ 142.959807] ? trace_hardirqs_on+0xd/0x10 [ 142.963936] ? hrtimer_try_to_cancel+0x9a/0x5c0 [ 142.968578] ? lock_acquire+0x1d5/0x580 [ 142.972529] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 142.977432] ? do_raw_spin_trylock+0x190/0x190 [ 142.981987] ? fault_in_user_writeable+0x90/0x90 [ 142.986729] ? fixup_pi_state_owner.isra.16+0x980/0x980 [ 142.992078] ? check_noncircular+0x20/0x20 [ 142.996286] ? hrtimer_cancel+0x2e/0x40 [ 143.000237] ? futex_wait_requeue_pi.constprop.19+0x8a8/0x1300 [ 143.006190] ? futex_requeue+0x2370/0x2370 [ 143.010415] ? find_held_lock+0x39/0x1d0 [ 143.014468] ? lock_downgrade+0x990/0x990 [ 143.018590] ? recalc_sigpending_tsk+0x117/0x150 [ 143.023320] ? recalc_sigpending+0x103/0x160 [ 143.027703] ? recalc_sigpending_tsk+0x150/0x150 [ 143.032431] ? get_signal+0x2b2/0x16d0 [ 143.036309] do_group_exit+0x149/0x400 [ 143.040173] ? __lock_is_held+0xbc/0x140 [ 143.044210] ? SyS_exit+0x30/0x30 [ 143.047637] ? _raw_spin_unlock_irq+0x27/0x70 [ 143.052108] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 143.057105] get_signal+0x73f/0x16d0 [ 143.060805] ? ptrace_notify+0x130/0x130 [ 143.064891] ? vmacache_find+0x5f/0x280 [ 143.068839] ? vmacache_update+0xfe/0x130 [ 143.072982] ? exit_robust_list+0x240/0x240 [ 143.077288] ? mm_fault_error+0x2c0/0x2c0 [ 143.081407] ? check_noncircular+0x20/0x20 [ 143.085623] do_signal+0x94/0x1ee0 [ 143.089147] ? find_held_lock+0x39/0x1d0 [ 143.093186] ? setup_sigcontext+0x7d0/0x7d0 [ 143.097491] ? lock_downgrade+0x990/0x990 [ 143.101623] ? retint_kernel+0x10/0x10 [ 143.105573] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 143.110565] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 143.115303] ? exit_to_usermode_loop+0x8c/0x310 [ 143.119955] exit_to_usermode_loop+0x214/0x310 [ 143.124515] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 143.130043] syscall_return_slowpath+0x42f/0x510 [ 143.134774] ? prepare_exit_to_usermode+0x2d0/0x2d0 [ 143.139767] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 143.144674] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 143.149665] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 143.154406] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 143.159133] RIP: 0033:0x4520a9 [ 143.162297] RSP: 002b:00007f7bf0dcfc08 EFLAGS: 00000216 ORIG_RAX: 00000000000000ca [ 143.169980] RAX: 0000000000000000 RBX: 00000000007180b0 RCX: 00000000004520a9 [ 143.177223] RDX: 0000000000000004 RSI: 000080000000000b RDI: 000000002000cffc [ 143.184467] RBP: 00000000000008f0 R08: 0000000020048000 R09: 0000000000000000 [ 143.191711] R10: 0000000020edfff0 R11: 0000000000000216 R12: 00000000004b77c8 [ 143.199040] R13: 00000000ffffffff R14: 000000002000cffc R15: 000080000000000b