------------[ cut here ]------------ WARNING: CPU: 1 PID: 4748 at kernel/locking/lockdep.c:937 look_up_lock_class+0x6a/0xd0 kernel/locking/lockdep.c:937 Modules linked in: CPU: 1 PID: 4748 Comm: syz-executor.4 Not tainted 6.0.0-rc3-syzkaller-00551-g2e5fb3223261 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:look_up_lock_class+0x6a/0xd0 kernel/locking/lockdep.c:937 Code: 85 c0 75 0a eb 57 48 8b 00 48 85 c0 74 4f 48 39 70 40 75 f2 48 8b 4f 18 48 39 88 b0 00 00 00 74 0b 48 81 3f 60 b4 51 8f 74 02 <0f> 0b 5d c3 9c 5a 80 e6 02 74 c2 e8 26 36 7a fa 85 c0 74 1f 8b 05 RSP: 0018:ffffc900049df800 EFLAGS: 00010006 RAX: ffffffff9092c960 RBX: ffffffff911b38c0 RCX: ffffffff8b1090e0 RDX: 0000000000000046 RSI: ffffffff9152bd00 RDI: ffff88807b4280b0 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88807b4280b0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f8f5c0e5700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000040 CR3: 000000007466b000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_lock_class+0xbe/0x1120 kernel/locking/lockdep.c:1287 __lock_acquire+0x109/0x56d0 kernel/locking/lockdep.c:4932 lock_acquire kernel/locking/lockdep.c:5666 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:354 [inline] lock_sock_nested+0x5b/0xf0 net/core/sock.c:3396 lock_sock include/net/sock.h:1726 [inline] do_ipv6_getsockopt.constprop.0+0x386/0x26a0 net/ipv6/ipv6_sockglue.c:1267 ipv6_getsockopt+0x13c/0x270 net/ipv6/ipv6_sockglue.c:1495 udpv6_getsockopt+0x5d/0x90 net/ipv6/udp.c:1660 __sys_getsockopt+0x216/0x690 net/socket.c:2296 __do_sys_getsockopt net/socket.c:2311 [inline] __se_sys_getsockopt net/socket.c:2308 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x460f19 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:00007f8f5c0e51a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 000000000052bfa8 RCX: 0000000000460f19 RDX: 0000000000000036 RSI: 0000000000000029 RDI: 0000000000000005 RBP: 0000000000000005 R08: 0000000020000080 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004ebd68 R14: 00000000004ac5f8 R15: 00007f8f5c0e56bc