------------[ cut here ]------------
WARNING: CPU: 1 PID: 20741 at kernel/locking/lockdep.c:840 look_up_lock_class kernel/locking/lockdep.c:840 [inline]
WARNING: CPU: 1 PID: 20741 at kernel/locking/lockdep.c:840 register_lock_class+0x206/0x1850 kernel/locking/lockdep.c:1185
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 20741 Comm: syz-executor.3 Not tainted 5.4.0-rc3-next-20191015 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:840 [inline]
RIP: 0010:register_lock_class+0x206/0x1850 kernel/locking/lockdep.c:1185
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 aa 10 00 00 4c 3b 7b 18 44 8b 35 15 ed 54 09 74 0b 48 81 3b a0 35 06 8a 74 02 <0f> 0b 45 85 ed 0f 84 71 03 00 00 f6 85 70 ff ff ff 01 0f 85 64 03
RSP: 0018:ffff8880937bf5b0 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff88808c1a8820 RCX: 0000000000000000
RDX: 1ffff11011835107 RSI: 0000000000000000 RDI: ffff88808c1a8838
RBP: ffff8880937bf678 R08: 1ffff110126f7ebe R09: ffffffff8aae7120
R10: ffffffff8a76e598 R11: 0000000000000000 R12: ffffffff8a7b19e0
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8846c040
 __lock_acquire+0xf4/0x4a00 kernel/locking/lockdep.c:3837
 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4487
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:343 [inline]
 lock_sock_nested+0x41/0x120 net/core/sock.c:2936
 lock_sock include/net/sock.h:1527 [inline]
 do_ipv6_setsockopt.isra.0+0x27a/0x4100 net/ipv6/ipv6_sockglue.c:165
 ipv6_setsockopt+0xf6/0x170 net/ipv6/ipv6_sockglue.c:944
 udpv6_setsockopt+0x68/0xb0 net/ipv6/udp.c:1565
 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3149
 __sys_setsockopt+0x261/0x4c0 net/socket.c:2085
 __do_sys_setsockopt net/socket.c:2101 [inline]
 __se_sys_setsockopt net/socket.c:2098 [inline]
 __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2098
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459a59
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8a17d52c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459a59
RDX: 0000000000000023 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 00000000000000e8 R09: 0000000000000000
R10: 00000000200002c0 R11: 0000000000000246 R12: 00007f8a17d536d4
R13: 00000000004cf638 R14: 00000000004de490 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..