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-1,10.128.0.10' (ECDSA) to the list of known hosts. 2017/09/30 02:18:06 parsed 1 programs 2017/09/30 02:18:06 executed programs: 0 2017/09/30 02:18:11 executed programs: 451 2017/09/30 02:18:16 executed programs: 912 syzkaller login: [ 69.104869] ------------[ cut here ]------------ [ 69.105661] WARNING: CPU: 0 PID: 7660 at kernel/futex.c:818 get_pi_state+0x15b/0x190 [ 69.106705] Kernel panic - not syncing: panic_on_warn set ... [ 69.106705] [ 69.107681] CPU: 0 PID: 7660 Comm: syz-executor6 Not tainted 4.14.0-rc2-mm1+ #11 [ 69.108675] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.109920] Call Trace: [ 69.110287] dump_stack+0x194/0x257 [ 69.110790] ? arch_local_irq_restore+0x53/0x53 [ 69.111437] panic+0x1e4/0x41c [ 69.111879] ? refcount_error_report+0x214/0x214 [ 69.112519] ? show_regs_print_info+0x65/0x65 [ 69.113163] ? get_pi_state+0x15b/0x190 [ 69.113721] __warn+0x1c4/0x1e0 [ 69.114191] ? get_pi_state+0x15b/0x190 [ 69.114736] report_bug+0x211/0x2d0 [ 69.115262] fixup_bug+0x40/0x90 [ 69.115772] do_trap+0x260/0x390 [ 69.116247] do_error_trap+0x120/0x390 [ 69.116787] ? do_trap+0x390/0x390 [ 69.117277] ? get_pi_state+0x15b/0x190 [ 69.117839] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 69.118539] do_invalid_op+0x1b/0x20 [ 69.119047] invalid_op+0x18/0x20 [ 69.119537] RIP: 0010:get_pi_state+0x15b/0x190 [ 69.120153] RSP: 0018:ffff8801c1c671a0 EFLAGS: 00010097 [ 69.120912] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff1003838ce39 [ 69.121910] RDX: ffff8801c1c98580 RSI: 0000000000000003 RDI: ffff8801c201d680 [ 69.122890] RBP: ffff8801c1c67230 R08: ffff8801c1c99840 R09: 1ffff1003838ce1e [ 69.123850] R10: ffff8801c1c98580 R11: 0000000000000002 R12: 1ffff1003838ce35 [ 69.124809] R13: ffff8801c201d680 R14: 1ffff1003838ce39 R15: ffff8801c201d740 [ 69.130892] ? futex_wait_queue_me+0x7e0/0x7e0 [ 69.135462] exit_pi_state_list+0x556/0x7a0 [ 69.139775] ? futex_wait_requeue_pi.constprop.19+0x1300/0x1300 [ 69.145810] ? lock_release+0xd70/0xd70 [ 69.149766] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 69.155626] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 69.160713] ? __might_sleep+0x95/0x190 [ 69.164670] ? __might_fault+0x188/0x1d0 [ 69.168714] ? do_raw_spin_trylock+0x190/0x190 [ 69.173277] mm_release+0x46d/0x590 [ 69.176876] ? do_raw_spin_trylock+0x190/0x190 [ 69.181431] ? mm_access+0x140/0x140 [ 69.185119] ? _raw_spin_unlock_irq+0x27/0x70 [ 69.189593] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 69.194584] ? trace_hardirqs_on+0xd/0x10 [ 69.198704] ? _raw_spin_unlock_irq+0x27/0x70 [ 69.203173] ? acct_collect+0x637/0x800 [ 69.207133] do_exit+0x481/0x1b00 [ 69.210568] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 69.215648] ? trace_hardirqs_on_caller+0x3f0/0x5c0 [ 69.220637] ? mm_update_next_owner+0x930/0x930 [ 69.225277] ? trace_hardirqs_on+0xd/0x10 [ 69.229405] ? hrtimer_try_to_cancel+0x9a/0x5c0 [ 69.234045] ? lock_acquire+0x1d5/0x580 [ 69.237997] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 69.242900] ? do_raw_spin_trylock+0x190/0x190 [ 69.247454] ? fault_in_user_writeable+0x90/0x90 [ 69.252196] ? fixup_pi_state_owner.isra.16+0x980/0x980 [ 69.257550] ? check_noncircular+0x20/0x20 [ 69.261758] ? hrtimer_cancel+0x2e/0x40 [ 69.265709] ? futex_wait_requeue_pi.constprop.19+0x8a8/0x1300 [ 69.271662] ? futex_requeue+0x2370/0x2370 [ 69.275886] ? find_held_lock+0x39/0x1d0 [ 69.279942] ? lock_downgrade+0x990/0x990 [ 69.284065] ? recalc_sigpending_tsk+0x117/0x150 [ 69.288803] ? recalc_sigpending+0x103/0x160 [ 69.293208] ? recalc_sigpending_tsk+0x150/0x150 [ 69.297947] ? get_signal+0x2b2/0x16d0 [ 69.301825] do_group_exit+0x149/0x400 [ 69.305686] ? __lock_is_held+0xbc/0x140 [ 69.309720] ? SyS_exit+0x30/0x30 [ 69.313146] ? _raw_spin_unlock_irq+0x27/0x70 [ 69.317618] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 69.322614] get_signal+0x73f/0x16d0 [ 69.326317] ? ptrace_notify+0x130/0x130 [ 69.330365] ? __schedule+0x8f0/0x2070 [ 69.334251] ? exit_robust_list+0x240/0x240 [ 69.338556] ? __fget+0xbb/0x580 [ 69.341904] do_signal+0x94/0x1ee0 [ 69.345419] ? lock_release+0xd70/0xd70 [ 69.349375] ? find_held_lock+0x39/0x1d0 [ 69.353413] ? setup_sigcontext+0x7d0/0x7d0 [ 69.357716] ? lock_downgrade+0x990/0x990 [ 69.361868] ? lock_release+0xd70/0xd70 [ 69.365817] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 69.371678] ? exit_to_usermode_loop+0x8c/0x310 [ 69.376334] exit_to_usermode_loop+0x214/0x310 [ 69.380894] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 69.386404] ? kasan_check_write+0x14/0x20 [ 69.390624] syscall_return_slowpath+0x42f/0x510 [ 69.395355] ? prepare_exit_to_usermode+0x2d0/0x2d0 [ 69.400348] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 69.405257] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 69.410250] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.414989] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 69.419716] RIP: 0033:0x4520a9 [ 69.422880] RSP: 002b:00007f7be2de4c08 EFLAGS: 00000216 ORIG_RAX: 00000000000000ca [ 69.430566] RAX: 0000000000000000 RBX: 00000000007180b0 RCX: 00000000004520a9 [ 69.437807] RDX: 0000000000000004 RSI: 000080000000000b RDI: 000000002000cffc [ 69.445049] RBP: 00000000000008f0 R08: 0000000020048000 R09: 0000000000000000 [ 69.452295] R10: 000000002000b000 R11: 0000000000000216 R12: 00000000004b77c8 [ 69.459542] R13: 00000000ffffffff R14: 000000002000cffc R15: 000080000000000b