------------[ cut here ]------------ Looking for class "l2tp_sock" with key l2tp_socket_class, but found a different class "slock-AF_INET6" with the same key WARNING: CPU: 0 PID: 10131 at kernel/locking/lockdep.c:937 look_up_lock_class+0x97/0x110 kernel/locking/lockdep.c:937 Modules linked in: CPU: 0 PID: 10131 Comm: syz-executor.0 Not tainted 6.1.0-syzkaller-12784-gc183e6c3ec34 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:look_up_lock_class+0x97/0x110 kernel/locking/lockdep.c:937 Code: 17 48 81 fa e0 d5 f6 8f 74 59 80 3d db ff 57 04 00 75 50 48 c7 c7 20 4d 4c 8a 48 89 04 24 c6 05 c7 ff 57 04 01 e8 a9 3f b9 ff <0f> 0b 48 8b 04 24 eb 31 9c 5a 80 e6 02 74 95 e8 85 64 02 fa 85 c0 RSP: 0018:ffffc90004867708 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffffffff91c05a00 RCX: 0000000000000000 RDX: ffff88806ec7ba80 RSI: ffffffff8166721c RDI: fffff5200090ced3 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000201 R11: 20676e696b6f6f4c R12: 0000000000000000 R13: ffff88806f1ff0b0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f79ab8bd700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052c000 CR3: 0000000079553000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_lock_class+0xbe/0x1120 kernel/locking/lockdep.c:1289 __lock_acquire+0x109/0x56d0 kernel/locking/lockdep.c:4934 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:355 [inline] lock_sock_nested+0x5f/0xf0 net/core/sock.c:3473 lock_sock include/net/sock.h:1725 [inline] sockopt_lock_sock+0x55/0x70 net/core/sock.c:1057 do_ipv6_setsockopt+0x311/0x4a40 net/ipv6/ipv6_sockglue.c:420 ipv6_setsockopt+0xdf/0x190 net/ipv6/ipv6_sockglue.c:1023 udpv6_setsockopt+0x84/0xd0 net/ipv6/udp.c:1686 __sys_setsockopt+0x2c6/0x5b0 net/socket.c:2246 __do_sys_setsockopt net/socket.c:2257 [inline] __se_sys_setsockopt net/socket.c:2254 [inline] __x64_sys_setsockopt+0xbe/0x160 net/socket.c:2254 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4603b9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f79ab8bd198 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000052bfa0 RCX: 00000000004603b9 RDX: 0000000000000023 RSI: 0000000000000029 RDI: 0000000000000004 RBP: 00000000004a9a99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000005 R14: 00000000004b9910 R15: 00007f79ab8bd6bc