netlink: 49 bytes leftover after parsing attributes in process `syz-executor1'.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8246 at kernel/locking/mutex.c:873 __mutex_trylock_slowpath kernel/locking/mutex.c:873 [inline]
WARNING: CPU: 1 PID: 8246 at kernel/locking/mutex.c:873 mutex_trylock+0x2f9/0x3e0 kernel/locking/mutex.c:908
DEBUG_LOCKS_WARN_ON(in_interrupt())
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8246 Comm: syz-executor5 Not tainted 4.9.116-g0137ea2 #70
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db3077f8 ffffffff81eb46a9 ffffffff83c48980 00000000ffffffff
 0000000000000000 0000000000000001 0000000000000369 ffff8801db3078b8
 ffffffff81421a75 0000000041b58ab3 ffffffff843bbff8 ffffffff814218b6
Call Trace:
 <IRQ> 
 [<ffffffff81eb46a9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb46a9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81421a75>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff81421d61>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff811366d2>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565
 [<ffffffff839f0d09>] __mutex_trylock_slowpath kernel/locking/mutex.c:873 [inline]
 [<ffffffff839f0d09>] mutex_trylock+0x2f9/0x3e0 kernel/locking/mutex.c:908
 [<ffffffff81282b49>] exp_funnel_lock kernel/rcu/tree_exp.h:256 [inline]
 [<ffffffff81282b49>] _synchronize_rcu_expedited+0x339/0x840 kernel/rcu/tree_exp.h:569
 [<ffffffff812840a3>] synchronize_rcu_expedited kernel/rcu/tree_exp.h:687 [inline]
 [<ffffffff812840a3>] synchronize_rcu.part.62+0xd3/0x110 kernel/rcu/tree_plugin.h:682
 [<ffffffff81284107>] synchronize_rcu+0x27/0x90 kernel/rcu/tree_plugin.h:685
 [<ffffffff836bed8a>] __l2tp_session_unhash+0x38a/0x520 net/l2tp/l2tp_core.c:1796
 [<ffffffff836bf117>] l2tp_tunnel_closeall+0x1f7/0x350 net/l2tp/l2tp_core.c:1364
 [<ffffffff836bf9d2>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff83022095>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff812877ce>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812877ce>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff812877ce>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff812877ce>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff812877ce>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff83a027fb>] __do_softirq+0x20b/0x937 kernel/softirq.c:284
 [<ffffffff8114b277>] invoke_softirq kernel/softirq.c:364 [inline]
 [<ffffffff8114b277>] irq_exit+0x147/0x190 kernel/softirq.c:405
 [<ffffffff83a013e1>] exiting_irq arch/x86/include/asm/apic.h:659 [inline]
 [<ffffffff83a013e1>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:960
 [<ffffffff839fd570>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> 
 [<ffffffff815464f7>] __do_huge_pmd_anonymous_page mm/huge_memory.c:559 [inline]
 [<ffffffff815464f7>] do_huge_pmd_anonymous_page+0x3c7/0x10f0 mm/huge_memory.c:701
 [<ffffffff814d122e>] create_huge_pmd mm/memory.c:3423 [inline]
 [<ffffffff814d122e>] __handle_mm_fault mm/memory.c:3573 [inline]
 [<ffffffff814d122e>] handle_mm_fault+0x1a9e/0x28e0 mm/memory.c:3634
 [<ffffffff810dba1f>] __do_page_fault+0x5af/0xd50 arch/x86/mm/fault.c:1407
 [<ffffffff810dc1e7>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1470
 [<ffffffff839fcd88>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:951
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..