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-1,10.128.15.219' (ECDSA) to the list of known hosts. 2017/09/30 20:17:37 parsed 1 programs 2017/09/30 20:17:37 executed programs: 0 syzkaller login: [ 219.165838] ------------[ cut here ]------------ [ 219.170644] WARNING: CPU: 1 PID: 3003 at kernel/futex.c:818 get_pi_state+0x15b/0x190 [ 219.178504] Kernel panic - not syncing: panic_on_warn set ... [ 219.178504] [ 219.185836] CPU: 1 PID: 3003 Comm: syz-executor0 Not tainted 4.14.0-rc2-mm1+ #11 [ 219.193348] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 219.202684] Call Trace: [ 219.205248] dump_stack+0x194/0x257 [ 219.208855] ? arch_local_irq_restore+0x53/0x53 [ 219.213513] panic+0x1e4/0x41c [ 219.216682] ? refcount_error_report+0x214/0x214 [ 219.221409] ? show_regs_print_info+0x65/0x65 [ 219.225896] ? get_pi_state+0x15b/0x190 [ 219.229840] __warn+0x1c4/0x1e0 [ 219.233091] ? get_pi_state+0x15b/0x190 [ 219.237040] report_bug+0x211/0x2d0 [ 219.240647] fixup_bug+0x40/0x90 [ 219.243987] do_trap+0x260/0x390 [ 219.247331] do_error_trap+0x120/0x390 [ 219.251193] ? perf_trace_lock+0xf1/0x860 [ 219.255316] ? do_trap+0x390/0x390 [ 219.258832] ? get_pi_state+0x15b/0x190 [ 219.262791] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 219.267616] do_invalid_op+0x1b/0x20 [ 219.271300] invalid_op+0x18/0x20 [ 219.274724] RIP: 0010:get_pi_state+0x15b/0x190 [ 219.279276] RSP: 0018:ffff8801bfc171a0 EFLAGS: 00010097 [ 219.284614] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff10037f82e39 [ 219.291853] RDX: ffff8801c02f8100 RSI: 0000000000000003 RDI: ffff8801d6225280 [ 219.299093] RBP: ffff8801bfc17230 R08: ffff8801c02f88f8 R09: 1ffff10037f82e1e [ 219.306333] R10: ffff8801c02f8100 R11: 0000000000000002 R12: 1ffff10037f82e35 [ 219.313576] R13: ffff8801d6225280 R14: 1ffff10037f82e39 R15: ffff8801d6225340 [ 219.320845] ? futex_wait_queue_me+0x7e0/0x7e0 [ 219.325416] exit_pi_state_list+0x556/0x7a0 [ 219.329721] ? futex_wait_requeue_pi.constprop.19+0x1300/0x1300 [ 219.335757] ? lock_release+0xd70/0xd70 [ 219.339703] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 219.345560] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 219.350642] ? __might_sleep+0x95/0x190 [ 219.354594] ? __might_fault+0x188/0x1d0 [ 219.358633] ? do_raw_spin_trylock+0x190/0x190 [ 219.363191] mm_release+0x46d/0x590 [ 219.366800] ? do_raw_spin_trylock+0x190/0x190 [ 219.371354] ? mm_access+0x140/0x140 [ 219.375038] ? _raw_spin_unlock_irq+0x27/0x70 [ 219.379506] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 219.384493] ? trace_hardirqs_on+0xd/0x10 [ 219.388612] ? _raw_spin_unlock_irq+0x27/0x70 [ 219.393079] ? acct_collect+0x637/0x800 [ 219.397029] do_exit+0x481/0x1b00 [ 219.400453] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 219.405541] ? trace_hardirqs_on_caller+0x3f0/0x5c0 [ 219.410529] ? mm_update_next_owner+0x930/0x930 [ 219.415165] ? trace_hardirqs_on+0xd/0x10 [ 219.419289] ? hrtimer_try_to_cancel+0x9a/0x5c0 [ 219.423932] ? lock_acquire+0x1d5/0x580 [ 219.427878] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 219.432780] ? do_raw_spin_trylock+0x190/0x190 [ 219.437332] ? fault_in_user_writeable+0x90/0x90 [ 219.442068] ? perf_trace_lock+0xf1/0x860 [ 219.446183] ? fixup_pi_state_owner.isra.16+0x980/0x980 [ 219.451523] ? check_noncircular+0x20/0x20 [ 219.455732] ? futex_wait_requeue_pi.constprop.19+0x8a8/0x1300 [ 219.461679] ? futex_requeue+0x2370/0x2370 [ 219.465895] ? find_held_lock+0x39/0x1d0 [ 219.469941] ? lock_downgrade+0x990/0x990 [ 219.474062] ? recalc_sigpending_tsk+0x117/0x150 [ 219.478789] ? recalc_sigpending+0x103/0x160 [ 219.483169] ? recalc_sigpending_tsk+0x150/0x150 [ 219.487892] ? get_signal+0x2b2/0x16d0 [ 219.491764] do_group_exit+0x149/0x400 [ 219.495621] ? __lock_is_held+0xbc/0x140 [ 219.499652] ? SyS_exit+0x30/0x30 [ 219.503075] ? _raw_spin_unlock_irq+0x27/0x70 [ 219.507544] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 219.512535] get_signal+0x73f/0x16d0 [ 219.516229] ? ptrace_notify+0x130/0x130 [ 219.520264] ? perf_trace_lock+0xf1/0x860 [ 219.524398] ? exit_robust_list+0x240/0x240 [ 219.528699] ? check_noncircular+0x20/0x20 [ 219.532912] do_signal+0x94/0x1ee0 [ 219.536430] ? find_held_lock+0x39/0x1d0 [ 219.540465] ? setup_sigcontext+0x7d0/0x7d0 [ 219.544774] ? lock_downgrade+0x990/0x990 [ 219.548913] ? lock_release+0xd70/0xd70 [ 219.552857] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 219.558710] ? lock_acquire+0x1d5/0x580 [ 219.562654] ? finish_task_switch+0x1aa/0x740 [ 219.567120] ? exit_to_usermode_loop+0x8c/0x310 [ 219.571765] exit_to_usermode_loop+0x214/0x310 [ 219.576320] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 219.581832] ? kasan_check_write+0x14/0x20 [ 219.586047] syscall_return_slowpath+0x42f/0x510 [ 219.590774] ? prepare_exit_to_usermode+0x2d0/0x2d0 [ 219.595763] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 219.600666] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 219.605654] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 219.610390] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 219.615116] RIP: 0033:0x4520a9 [ 219.618276] RSP: 002b:00007efef3b61c08 EFLAGS: 00000216 ORIG_RAX: 00000000000000ca [ 219.625958] RAX: 0000000000000000 RBX: 00000000007180b0 RCX: 00000000004520a9 [ 219.633197] RDX: 0000000000000004 RSI: 000080000000000b RDI: 000000002000cffc [ 219.640437] RBP: 00000000000008f0 R08: 0000000020048000 R09: 0000000000000000 [ 219.647689] R10: 000000002000b000 R11: 0000000000000216 R12: 00000000004b77c8 [ 219.654929] R13: 00000000ffffffff R14: 000000002000cffc R15: 000080000000000b