------------[ cut here ]------------ WARNING: CPU: 0 PID: 8602 at kernel/locking/lockdep.c:897 look_up_lock_class+0x6a/0xd0 kernel/locking/lockdep.c:897 Modules linked in: CPU: 0 PID: 8602 Comm: syz-executor.0 Not tainted 5.14.0-rc4-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 c0 f3 ed 8e 74 02 <0f> 0b 5d c3 9c 5a 80 e6 02 74 c2 e8 76 e6 a8 fa 85 c0 74 1f 8b 05 RSP: 0018:ffffc90009737788 EFLAGS: 00010006 RAX: ffffffff8fd27e00 RBX: ffffffff90229760 RCX: ffffffff8aa4db20 RDX: 0000000000000046 RSI: ffffffff905a9b40 RDI: ffff8880319f7860 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880319f7860 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe704e50700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe704e50718 CR3: 000000003146e000 CR4: 00000000001506f0 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:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] lock_sock_nested+0x40/0x120 net/core/sock.c:3162 lock_sock include/net/sock.h:1613 [inline] do_ipv6_setsockopt.constprop.0+0x2e8/0x4230 net/ipv6/ipv6_sockglue.c:418 ipv6_setsockopt+0xd6/0x180 net/ipv6/ipv6_sockglue.c:1003 udpv6_setsockopt+0x76/0xc0 net/ipv6/udp.c:1646 __sys_setsockopt+0x2db/0x610 net/socket.c:2159 __do_sys_setsockopt net/socket.c:2170 [inline] __se_sys_setsockopt net/socket.c:2167 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2167 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: 0033:0x4665e9 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:00007fe704e50188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 000000000000003b RSI: 0000000000000029 RDI: 0000000000000005 RBP: 00000000004bfcc4 R08: 0000000000000008 R09: 0000000000000000 R10: 0000000020000380 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffff563f67f R14: 00007fe704e50300 R15: 0000000000022000