[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.
[   10.169887] sshd (3000) used greatest stack depth: 13936 bytes left
[....] 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-test-0,10.128.15.206' (ECDSA) to the list of known hosts.
2017/12/06 17:32:07 fuzzer started
2017/12/06 17:32:07 connecting to host at 10.128.0.26:42327
2017/12/06 17:32:07 checking config...
syzkaller login: [   33.014175] WARNING: CPU: 1 PID: 3089 at kernel/sched/wait.c:79 __wake_up_common+0x433/0x770
[   33.015440] Kernel panic - not syncing: panic_on_warn set ...
[   33.015440] 
[   33.016407] CPU: 1 PID: 3089 Comm: syz-fuzzer Not tainted 4.15.0-rc2-mm1+ #38
[   33.017359] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.018595] Call Trace:
[   33.018954]  dump_stack+0x194/0x257
[   33.019448]  ? arch_local_irq_restore+0x53/0x53
[   33.020090]  ? vsnprintf+0x1ed/0x1900
[   33.020636]  panic+0x1e4/0x41c
[   33.021068]  ? refcount_error_report+0x214/0x214
[   33.021701]  ? show_regs_print_info+0x18/0x18
[   33.022328]  ? __warn+0x1c1/0x200
[   33.022799]  ? __wake_up_common+0x433/0x770
[   33.023374]  __warn+0x1dc/0x200
[   33.023818]  ? __wake_up_common+0x433/0x770
[   33.024426]  report_bug+0x211/0x2d0
[   33.024922]  fixup_bug.part.11+0x37/0x80
[   33.025467]  do_error_trap+0x2d7/0x3e0
[   33.025992]  ? math_error+0x400/0x400
[   33.026519]  ? check_noncircular+0x20/0x20
[   33.027091]  ? find_held_lock+0x39/0x1d0
[   33.027639]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   33.028290]  do_invalid_op+0x1b/0x20
[   33.028790]  invalid_op+0x22/0x40
[   33.029256] RIP: 0010:__wake_up_common+0x433/0x770
[   33.029907] RSP: 0018:ffff8801cb5bf4b0 EFLAGS: 00010046
[   33.030642] RAX: 0000000000000000 RBX: ffff8801cc446190 RCX: 0000000000000004
[   33.031606] RDX: 1ffffffff0bd9719 RSI: ffff8801cc4461a8 RDI: 0000000000000082
[   33.032569] RBP: ffff8801cb5bf5b0 R08: 0000000000000000 R09: 0000000000000000
[   33.033523] R10: 0000000000000000 R11: ffffffff87488d60 R12: 0000000000000000
[   33.035555] R13: ffff8801cc4461d0 R14: 0000000000000001 R15: ffff8801cc446230
[   33.042810]  ? __lock_is_held+0xbc/0x140
[   33.046846]  ? lock_release+0xda0/0xda0
[   33.050789]  ? do_wait_intr+0x3e0/0x3e0
[   33.054739]  ? __lock_is_held+0xbc/0x140
[   33.058777]  __wake_up_locked+0x11/0x20
[   33.062722]  ep_insert+0x15a5/0x1ac0
[   33.066405]  ? __seq_open_private+0x3b/0xc0
[   33.070708]  ? ep_poll+0x1190/0x1190
[   33.074391]  ? lock_release+0xda0/0xda0
[   33.078330]  ? trace_event_raw_event_sched_switch+0x800/0x800
[   33.084179]  ? lock_downgrade+0x980/0x980
[   33.088298]  ? rcu_note_context_switch+0x710/0x710
[   33.093202]  ? __might_sleep+0x95/0x190
[   33.097158]  ? SyS_epoll_ctl+0x8a3/0x1a80
[   33.101276]  ? __mutex_lock+0x16f/0x1a80
[   33.105311]  ? SyS_epoll_ctl+0x8a3/0x1a80
[   33.109440]  ? lock_downgrade+0x980/0x980
[   33.113556]  ? SyS_epoll_ctl+0x8a3/0x1a80
[   33.117683]  ? lock_release+0xda0/0xda0
[   33.121627]  ? __lock_is_held+0xbc/0x140
[   33.125666]  ? __fget+0x362/0x580
[   33.129097]  ? iterate_fd+0x3f0/0x3f0
[   33.132867]  ? find_held_lock+0x39/0x1d0
[   33.136906]  ? lock_downgrade+0x980/0x980
[   33.141023]  ? __might_fault+0xe0/0x1d0
[   33.144970]  ? __fget_light+0x29d/0x390
[   33.148915]  ? fget_raw+0x20/0x20
[   33.152340]  ? is_bpf_text_address+0xa4/0x120
[   33.156802]  ? kernel_text_address+0x102/0x140
[   33.161358]  ? __might_sleep+0x95/0x190
[   33.165299]  ? ep_unregister_pollwait.isra.7+0x590/0x590
[   33.170726]  SyS_epoll_ctl+0x12bf/0x1a80
[   33.174751]  ? SyS_epoll_ctl+0x12bf/0x1a80
[   33.178952]  ? save_stack+0xa3/0xd0
[   33.182553]  ? SyS_epoll_create+0x240/0x240
[   33.186841]  ? __lock_is_held+0xbc/0x140
[   33.190881]  ? __fd_install+0x288/0x740
[   33.194827]  ? get_unused_fd_flags+0x190/0x190
[   33.199376]  ? may_open_dev+0xe0/0xe0
[   33.203155]  ? rcu_pm_notify+0xc0/0xc0
[   33.207018]  ? putname+0xee/0x130
[   33.210438]  ? putname+0xee/0x130
[   33.213862]  ? rcu_read_lock_sched_held+0x108/0x120
[   33.218846]  ? kmem_cache_free+0x249/0x280
[   33.223050]  ? putname+0xf3/0x130
[   33.226471]  ? do_sys_open+0x320/0x6d0
[   33.230332]  ? entry_SYSCALL_64_fastpath+0x5/0x96
[   33.235143]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   33.240131]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   33.244865]  entry_SYSCALL_64_fastpath+0x1f/0x96
[   33.249587] RIP: 0033:0x45f7d8
[   33.252742] RSP: 002b:000000c4203f93f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9
[   33.260416] RAX: ffffffffffffffda RBX: 00007fb9110ff700 RCX: 000000000045f7d8
[   33.267654] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004
[   33.274891] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   33.282126] R10: 000000c4203f9424 R11: 0000000000000246 R12: 00007fb9118ffbb0
[   33.289361] R13: 00007fb9110ff9c0 R14: 00007fb91422e040 R15: 0000000000000003
[   33.296813] Dumping ftrace buffer:
[   33.300399]    (ftrace buffer empty)
[   33.304076] Kernel Offset: disabled
[   33.307674] Rebooting in 86400 seconds..