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WARNING: CPU: 1 PID: 30469 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 [<ffffffff811488d3>] do_wait+0x333/0x950 kernel/exit.c:1587
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 30469 Comm: syz-executor5 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> [ 2268.136652]  [<ffffffff81eb95e9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [ 2268.136652]  [<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> [ 2268.304293]  [<ffffffff83a010ff>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
 <EOI> [ 2268.304293]  [<ffffffff83a010ff>] ? __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:162 [inline]
 <EOI> [ 2268.304293]  [<ffffffff83a010ff>] ? _raw_spin_unlock_irqrestore+0x5f/0x70 kernel/locking/spinlock.c:191
 [<ffffffff81cfbde9>] spin_unlock_irqrestore include/linux/spinlock.h:362 [inline]
 [<ffffffff81cfbde9>] avc_reclaim_node security/selinux/avc.c:543 [inline]
 [<ffffffff81cfbde9>] avc_alloc_node+0x289/0x3d0 security/selinux/avc.c:561
 [<ffffffff81cfca38>] avc_insert security/selinux/avc.c:672 [inline]
 [<ffffffff81cfca38>] avc_compute_av+0x178/0x610 security/selinux/avc.c:978
 [<ffffffff81cfeb14>] avc_has_perm_noaudit security/selinux/avc.c:1114 [inline]
 [<ffffffff81cfeb14>] avc_has_perm+0x364/0x4f0 security/selinux/avc.c:1148
 [<ffffffff81d10d0c>] task_has_perm+0x1fc/0x330 security/selinux/hooks.c:1615
 [<ffffffff81d10e63>] selinux_task_wait+0x23/0x30 security/selinux/hooks.c:3954
 [<ffffffff81cf7ba3>] security_task_wait+0x73/0xb0 security/security.c:1032
 [<ffffffff81145221>] wait_consider_task+0x2a1/0x3620 kernel/exit.c:1377
 [<ffffffff811489c3>] do_wait_thread kernel/exit.c:1490 [inline]
 [<ffffffff811489c3>] do_wait+0x423/0x950 kernel/exit.c:1561
 [<ffffffff811498fb>] SYSC_wait4 kernel/exit.c:1693 [inline]
 [<ffffffff811498fb>] SyS_wait4+0x12b/0x1f0 kernel/exit.c:1658
 [<ffffffff812ff797>] C_SYSC_wait4+0x237/0x280 kernel/compat.c:543
 [<ffffffff812ffb5c>] compat_SyS_wait4+0x2c/0x40 kernel/compat.c:536
 [<ffffffff8111c935>] sys32_waitpid+0x25/0x30 arch/x86/ia32/sys_ia32.c:172
 [<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
Shutting down cpus with NMI
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..