------------[ cut here ]------------ WARNING: CPU: 0 PID: 19543 at kernel/locking/lockdep.c:895 look_up_lock_class kernel/locking/lockdep.c:895 [inline] WARNING: CPU: 0 PID: 19543 at kernel/locking/lockdep.c:895 register_lock_class+0x1fb/0x1180 kernel/locking/lockdep.c:1244 Modules linked in: CPU: 0 PID: 19543 Comm: syz-executor.2 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:895 [inline] RIP: 0010:register_lock_class+0x1fb/0x1180 kernel/locking/lockdep.c:1244 Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 98 0c 00 00 4d 3b 67 18 74 0b 49 81 3f c0 a3 42 8f 74 02 <0f> 0b 85 ed 0f 84 20 01 00 00 f6 44 24 04 01 0f 85 15 01 00 00 83 RSP: 0018:ffffc90011267630 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 1ffff9200224cecd RCX: ffffffff90774720 RDX: 1ffff110041a38cf RSI: 0000000000000000 RDI: ffff888020d1c678 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8a683d20 R13: ffffffff90ae9880 R14: ffffffff90271300 R15: ffff888020d1c660 FS: 00007f8abdbb6700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffef81e0788 CR3: 00000000191e6000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_acquire+0x102/0x5230 kernel/locking/lockdep.c:4781 lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __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:3065 lock_sock include/net/sock.h:1610 [inline] inet_autobind+0x1a/0x190 net/ipv4/af_inet.c:180 inet_send_prepare net/ipv4/af_inet.c:807 [inline] inet_send_prepare+0x36d/0x4d0 net/ipv4/af_inet.c:801 inet6_sendmsg+0x3f/0xe0 net/ipv6/af_inet6.c:639 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x331/0x810 net/socket.c:2337 ___sys_sendmsg+0xf3/0x170 net/socket.c:2391 __sys_sendmmsg+0x195/0x470 net/socket.c:2477 __do_sys_sendmmsg net/socket.c:2506 [inline] __se_sys_sendmmsg net/socket.c:2503 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2503 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 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:00007f8abdbb6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9 RDX: 0000000000000001 RSI: 00000000200018c0 RDI: 0000000000000008 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007fff5ba6e9ff R14: 00007f8abdbb6300 R15: 0000000000022000