------------[ cut here ]------------
WARNING: CPU: 1 PID: 29252 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 net/ipv4/af_inet.c:167
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 29252 Comm: syz-executor6 Not tainted 4.9.124-g09eb2ba #31
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307cc0 ffffffff81eb95e9 ffffffff83c48ac0 00000000ffffffff
 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80
 ffffffff81423eb5 0000000041b58ab3 ffffffff843bb8e8 ffffffff81423cf6
Call Trace:
 <IRQ> [  648.943026]  [<ffffffff81eb95e9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  648.943026]  [<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
 [<ffffffff811383bc>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff8342c878>] inet_sock_destruct+0x598/0x760 net/ipv4/af_inet.c:167
 [<ffffffff836c5839>] l2tp_tunnel_destruct+0x339/0x590 net/l2tp/l2tp_core.c:1329
 [<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> [  649.065297]  [<ffffffff83a010ff>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
 <EOI> [  649.065297]  [<ffffffff83a010ff>] ? __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:162 [inline]
 <EOI> [  649.065297]  [<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
 [<ffffffff81d0afab>] may_create+0x36b/0x440 security/selinux/hooks.c:1861
 [<ffffffff81d0b162>] selinux_inode_symlink+0x22/0x30 security/selinux/hooks.c:2936
 [<ffffffff81cf4cf1>] security_inode_symlink+0xc1/0x100 security/security.c:548
 [<ffffffff8159d3a9>] vfs_symlink2+0x2c9/0x560 fs/namei.c:4141
 [<ffffffff815b151c>] SYSC_symlinkat fs/namei.c:4178 [inline]
 [<ffffffff815b151c>] SyS_symlinkat fs/namei.c:4158 [inline]
 [<ffffffff815b151c>] SYSC_symlink fs/namei.c:4191 [inline]
 [<ffffffff815b151c>] SyS_symlink+0x1cc/0x260 fs/namei.c:4189
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a019d3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..