------------[ cut here ]------------ WARNING: CPU: 1 PID: 24116 at kernel/locking/lockdep.c:897 look_up_lock_class+0x6a/0xd0 kernel/locking/lockdep.c:897 Modules linked in: CPU: 1 PID: 24116 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:look_up_lock_class+0x6a/0xd0 kernel/locking/lockdep.c:897 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 20 c5 f3 8e 74 02 <0f> 0b 5d c3 9c 5a 80 e6 02 74 c2 e8 a6 84 9e fa 85 c0 74 1f 8b 05 RSP: 0018:ffffc90003dff788 EFLAGS: 00010002 RAX: ffffffff8fd839a0 RBX: ffffffff902869c0 RCX: ffffffff8aa77700 RDX: 0000000000000046 RSI: ffffffff905fcf80 RDI: ffff8880398618a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880398618a0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fa5f0f50700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00c679000 CR3: 000000003c974000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_lock_class+0xb7/0x10c0 kernel/locking/lockdep.c:1246 __lock_acquire+0x105/0x54a0 kernel/locking/lockdep.c:4894 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __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:355 [inline] lock_sock_nested+0x5b/0xf0 net/core/sock.c:3288 lock_sock include/net/sock.h:1645 [inline] do_ipv6_setsockopt.constprop.0+0x2e8/0x4270 net/ipv6/ipv6_sockglue.c:420 ipv6_setsockopt+0xd6/0x180 net/ipv6/ipv6_sockglue.c:1012 udpv6_setsockopt+0x76/0xc0 net/ipv6/udp.c:1647 __sys_setsockopt+0x2db/0x610 net/socket.c:2176 __do_sys_setsockopt net/socket.c:2187 [inline] __se_sys_setsockopt net/socket.c:2184 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2184 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+0x44/0xae RIP: 0033:0x7fa5f39fbae9 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:00007fa5f0f50188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fa5f3b0f020 RCX: 00007fa5f39fbae9 RDX: 0000000000000023 RSI: 0000000000000029 RDI: 0000000000000005 RBP: 00007fa5f3a55f25 R08: 0000000000001000 R09: 0000000000000000 R10: 00000000200001c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd1bca2adf R14: 00007fa5f0f50300 R15: 0000000000022000