------------[ cut here ]------------
WARNING: CPU: 1 PID: 14219 at kernel/sched/core.c:7943 __might_sleep+0x149/0x1a0 kernel/sched/core.c:7938
do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff839fef62>] do_nanosleep+0x102/0x4d0 kernel/time/hrtimer.c:1496
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 14219 Comm: syz-executor0 Not tainted 4.9.124-g09eb2ba #35
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307b28 ffffffff81eb95e9 ffffffff83c48ac0 00000000ffffffff
 0000000000000000 0000000000000001 0000000000001f07 ffff8801db307be8
 ffffffff81423eb5 0000000041b58ab3 ffffffff843bb8e8 ffffffff81423cf6
Call Trace:
 <IRQ> [  175.627392]  [<ffffffff81eb95e9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  175.627392]  [<ffffffff81eb95e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81423eb5>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff814241a1>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff81138252>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565
 [<ffffffff811bda59>] __might_sleep+0x149/0x1a0 kernel/sched/core.c:7938
 [<ffffffff8302b774>] lock_sock_nested+0x34/0x120 net/core/sock.c:2502
 [<ffffffff83428dd9>] lock_sock include/net/sock.h:1404 [inline]
 [<ffffffff83428dd9>] inet_shutdown+0x69/0x360 net/ipv4/af_inet.c:823
 [<ffffffff836cb740>] pppol2tp_session_close+0xa0/0xe0 net/l2tp/l2tp_ppp.c:441
 [<ffffffff836c4f71>] l2tp_tunnel_closeall+0x231/0x350 net/l2tp/l2tp_core.c:1368
 [<ffffffff836c57f2>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff830281f5>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff812899ee>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812899ee>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff812899ee>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff812899ee>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff812899ee>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff83a085c0>] __do_softirq+0x210/0x940 kernel/softirq.c:288
 [<ffffffff8114d554>] invoke_softirq kernel/softirq.c:368 [inline]
 [<ffffffff8114d554>] irq_exit+0x114/0x150 kernel/softirq.c:409
 [<ffffffff83a071a1>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff83a071a1>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:962
 [<ffffffff83a03330>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> [  175.796147]  [<ffffffff83a010ff>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
 <EOI> [  175.796147]  [<ffffffff83a010ff>] ? __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:162 [inline]
 <EOI> [  175.796147]  [<ffffffff83a010ff>] ? _raw_spin_unlock_irqrestore+0x5f/0x70 kernel/locking/spinlock.c:191
 [<ffffffff812a5750>] unlock_hrtimer_base kernel/time/hrtimer.c:803 [inline]
 [<ffffffff812a5750>] hrtimer_start_range_ns+0x670/0x1380 kernel/time/hrtimer.c:1010
 [<ffffffff839feff7>] hrtimer_start_expires include/linux/hrtimer.h:407 [inline]
 [<ffffffff839feff7>] do_nanosleep+0x197/0x4d0 kernel/time/hrtimer.c:1494
 [<ffffffff812a8520>] hrtimer_nanosleep+0x210/0x540 kernel/time/hrtimer.c:1566
 [<ffffffff812fdcbe>] C_SYSC_nanosleep kernel/compat.c:254 [inline]
 [<ffffffff812fdcbe>] compat_SyS_nanosleep+0x27e/0x390 kernel/compat.c:239
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff83a030d0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..