------------[ cut here ]------------
WARNING: CPU: 1 PID: 3349 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 net/ipv4/af_inet.c:167
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3349 Comm: syzkaller517908 Not tainted 4.9.77-ge12a9c4 #27
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307cb8 ffffffff81d941c9 ffffffff83a47bc0 ffff8801db307d90
 ffffffff83f2f000 ffffffff832ebc36 0000000000000009 ffff8801db307d80
 ffffffff8142f3c1 0000000041b58ab3 ffffffff8418ab70 ffffffff8142f205
Call Trace:
 <IRQ> [   19.405360]  [<ffffffff81d941c9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [   19.405360]  [<ffffffff81d941c9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142f3c1>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff81131144>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff811313ac>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff832ebc36>] inet_sock_destruct+0x5f6/0x7b0 net/ipv4/af_inet.c:167
 [<ffffffff835849d2>] l2tp_tunnel_destruct+0x352/0x5a0 net/l2tp/l2tp_core.c:1329
 [<ffffffff82ee5033>] __sk_destruct+0x53/0x570 net/core/sock.c:1428
 [<ffffffff812930f8>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812930f8>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff812930f8>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff812930f8>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff812930f8>] rcu_process_callbacks+0x898/0x1300 kernel/rcu/tree.c:3037
 [<ffffffff838b9846>] __do_softirq+0x206/0x951 kernel/softirq.c:284
 [<ffffffff81146bc5>] invoke_softirq kernel/softirq.c:364 [inline]
 [<ffffffff81146bc5>] irq_exit+0x165/0x190 kernel/softirq.c:405
 [<ffffffff838b845b>] exiting_irq arch/x86/include/asm/apic.h:659 [inline]
 [<ffffffff838b845b>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:960
 [<ffffffff838b46e0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:741
 <EOI> [   19.473459]  [<ffffffff810d4d4a>] ? unwind_get_return_address+0x2a/0xa0 arch/x86/kernel/unwind_frame.c:10
 [<ffffffff8107c6bd>] __save_stack_trace+0x8d/0xf0 arch/x86/kernel/stacktrace.c:43
 [<ffffffff8107c736>] save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 [<ffffffff8153cbe3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:505
 [<ffffffff8153cead>] set_track mm/kasan/kasan.c:517 [inline]
 [<ffffffff8153cead>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:609
 [<ffffffff81538edb>] kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742
 [<ffffffff81c049d3>] kmalloc include/linux/slab.h:490 [inline]
 [<ffffffff81c049d3>] kzalloc include/linux/slab.h:636 [inline]
 [<ffffffff81c049d3>] ebitmap_cpy+0xf3/0x360 security/selinux/ss/ebitmap.c:57
 [<ffffffff81c36e4d>] mls_context_cpy security/selinux/ss/context.h:50 [inline]
 [<ffffffff81c36e4d>] mls_compute_sid+0x4ed/0x870 security/selinux/ss/mls.c:555
 [<ffffffff81c21c95>] security_compute_sid.part.12+0x615/0x10c0 security/selinux/ss/services.c:1711
 [<ffffffff81c22825>] security_compute_sid+0xe5/0x110 security/selinux/ss/services.c:1587
 [<ffffffff81c2991a>] security_transition_sid+0x7a/0x90 security/selinux/ss/services.c:1750
 [<ffffffff81bec9b6>] socket_sockcreate_sid security/selinux/hooks.c:4249 [inline]
 [<ffffffff81bec9b6>] selinux_socket_post_create+0x416/0x510 security/selinux/hooks.c:4302
 [<ffffffff81bd53fb>] security_socket_post_create+0x8b/0xc0 security/security.c:1257
 [<ffffffff82eda30c>] __sock_create+0x52c/0x640 net/socket.c:1198
 [<ffffffff82eda650>] sock_create net/socket.c:1222 [inline]
 [<ffffffff82eda650>] SYSC_socket net/socket.c:1252 [inline]
 [<ffffffff82eda650>] SyS_socket+0xf0/0x1b0 net/socket.c:1232
 [<ffffffff81006fc7>] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline]
 [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384
 [<ffffffff838b44b4>] entry_SYSENTER_compat+0x74/0x83 arch/x86/entry/entry_64_compat.S:127
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..