SELinux: unrecognized netlink message: protocol=0 nlmsg_type=15 sclass=netlink_route_socket pig=11028 comm=syz-executor.1
refcount_t: increment on 0; use-after-free.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11030 at lib/refcount.c:153 refcount_inc lib/refcount.c:153 [inline]
WARNING: CPU: 1 PID: 11030 at lib/refcount.c:153 refcount_inc.cold+0x18/0x1f lib/refcount.c:151
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 11030 Comm: syz-executor.5 Not tainted 4.14.151 #0
(unnamed net_device) (uninitialized): option primary: mode dependency failed, not supported in mode balance-rr(0)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x197 lib/dump_stack.c:53
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x2f/0x2f kernel/panic.c:547
 report_bug+0x216/0x254 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:refcount_inc lib/refcount.c:153 [inline]
RIP: 0010:refcount_inc.cold+0x18/0x1f lib/refcount.c:151
RSP: 0018:ffff88805b0a7b70 EFLAGS: 00010286
RAX: 000000000000002b RBX: ffff888067b70b88 RCX: 0000000000000000
RDX: 0000000000007cc0 RSI: ffffffff814b3f65 RDI: ffffed100b614f64
RBP: ffff88805b0a7b78 R08: 000000000000002b R09: ffff888067b9ac70
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a179b880
R13: 0000000000000000 R14: ffff88806694fa20 R15: ffff88806694fa00
 sock_hold include/net/sock.h:619 [inline]
 l2tp_session_add_to_tunnel net/l2tp/l2tp_core.c:368 [inline]
 l2tp_session_create+0x118b/0x1600 net/l2tp/l2tp_core.c:1846
 pppol2tp_connect+0x11bf/0x18b0 net/l2tp/l2tp_ppp.c:721
 SYSC_connect+0x1f6/0x2d0 net/socket.c:1655
 SyS_connect+0x24/0x30 net/socket.c:1636
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459f49
RSP: 002b:00007fe99a903c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459f49
RDX: 000000000000002e RSI: 0000000020000000 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe99a9046d4
R13: 00000000004c068b R14: 00000000004d2d58 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..