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SELinux: unrecognized netlink message: protocol=0 nlmsg_type=9 sclass=netlink_route_socket pig=21356 comm=syz-executor3
WARNING: CPU: 0 PID: 21353 at kernel/locking/mutex.c:873 __mutex_trylock_slowpath kernel/locking/mutex.c:873 [inline]
WARNING: CPU: 0 PID: 21353 at kernel/locking/mutex.c:873 mutex_trylock+0x2f9/0x3e0 kernel/locking/mutex.c:908
DEBUG_LOCKS_WARN_ON(in_interrupt())[  262.749843] SELinux: unrecognized netlink message: protocol=0 nlmsg_type=9 sclass=netlink_route_socket pig=21361 comm=syz-executor3
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 21353 Comm: blkid Not tainted 4.9.100-g73fdfa3 #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db2077f8 ffffffff81eb0f09 ffffffff83c484a0 00000000ffffffff
 0000000000000000 0000000000000000 0000000000000369 ffff8801db2078b8
 ffffffff8141f895 0000000041b58ab3 ffffffff843b87e8 ffffffff8141f6d6
Call Trace:
 <IRQ> [  262.818417]  [<ffffffff81eb0f09>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  262.818417]  [<ffffffff81eb0f09>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=9 sclass=netlink_route_socket pig=21372 comm=syz-executor5
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=9 sclass=netlink_route_socket pig=21371 comm=syz-executor3
 [<ffffffff8141f895>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff8141fb81>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff811344b2>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565
 [<ffffffff839e9739>] __mutex_trylock_slowpath kernel/locking/mutex.c:873 [inline]
 [<ffffffff839e9739>] mutex_trylock+0x2f9/0x3e0 kernel/locking/mutex.c:908
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=9 sclass=netlink_route_socket pig=21375 comm=syz-executor1
 [<ffffffff81280b09>] exp_funnel_lock kernel/rcu/tree_exp.h:256 [inline]
 [<ffffffff81280b09>] _synchronize_rcu_expedited+0x339/0x840 kernel/rcu/tree_exp.h:569
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=9 sclass=netlink_route_socket pig=21381 comm=syz-executor5
 [<ffffffff81282063>] synchronize_rcu_expedited kernel/rcu/tree_exp.h:687 [inline]
 [<ffffffff81282063>] synchronize_rcu.part.62+0xd3/0x110 kernel/rcu/tree_plugin.h:676
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=9 sclass=netlink_route_socket pig=21385 comm=syz-executor3
 [<ffffffff812820c7>] synchronize_rcu+0x27/0x90 kernel/rcu/tree_plugin.h:679
 [<ffffffff836b7a7a>] __l2tp_session_unhash+0x38a/0x520 net/l2tp/l2tp_core.c:1796
 [<ffffffff836b7e07>] l2tp_tunnel_closeall+0x1f7/0x350 net/l2tp/l2tp_core.c:1364
 [<ffffffff836b86c2>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff8301d095>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff8128578e>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff8128578e>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff8128578e>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff8128578e>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff8128578e>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff839fb1fb>] __do_softirq+0x20b/0x937 kernel/softirq.c:284
 [<ffffffff81149037>] invoke_softirq kernel/softirq.c:364 [inline]
 [<ffffffff81149037>] irq_exit+0x147/0x190 kernel/softirq.c:405
 [<ffffffff839f9de1>] exiting_irq arch/x86/include/asm/apic.h:659 [inline]
 [<ffffffff839f9de1>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:960
 [<ffffffff839f5f70>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> [  263.145069] Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..