------------[ cut here ]------------ WARNING: CPU: 1 PID: 14468 at kernel/locking/lockdep.c:894 look_up_lock_class kernel/locking/lockdep.c:894 [inline] WARNING: CPU: 1 PID: 14468 at kernel/locking/lockdep.c:894 register_lock_class+0x206/0x1910 kernel/locking/lockdep.c:1242 Modules linked in: CPU: 1 PID: 14468 Comm: syz-executor.3 Not tainted 5.12.0-rc2-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:894 [inline] RIP: 0010:register_lock_class+0x206/0x1910 kernel/locking/lockdep.c:1242 Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 1a 10 00 00 4d 3b 68 18 74 0b 49 81 38 40 5e ff 89 74 02 <0f> 0b 45 85 c9 0f 84 b3 00 00 00 f6 85 70 ff ff ff 01 0f 85 a6 00 RSP: 0018:ffff88811a4e79b8 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 1ffff1102349cf40 RCX: ffffffff8aa991e0 RDX: 1ffff110206a1117 RSI: 0000000000000000 RDI: ffff8881035088b8 RBP: ffff88811a4e7a88 R08: ffff8881035088a0 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000005f1 R12: ffffffff8a753c00 R13: ffffffff88226420 R14: ffff88811a4e7a60 R15: ffffffff8ade67c0 FS: 00007f00b2ac0700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d0625 CR3: 0000000101aa0001 CR4: 00000000001706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_acquire+0xff/0x53d0 kernel/locking/lockdep.c:4779 reacquire_held_locks+0x20a/0x510 kernel/locking/lockdep.c:5038 __lock_release kernel/locking/lockdep.c:5226 [inline] lock_release+0x3de/0x970 kernel/locking/lockdep.c:5530 sock_release_ownership include/net/sock.h:1567 [inline] release_sock+0x143/0x180 net/core/sock.c:3088 ip6_datagram_connect+0x33/0x40 net/ipv6/datagram.c:273 inet_dgram_connect+0x109/0x2c0 net/ipv4/af_inet.c:580 __sys_connect_file+0x142/0x1a0 net/socket.c:1837 __sys_connect+0x101/0x130 net/socket.c:1854 __do_sys_connect net/socket.c:1864 [inline] __se_sys_connect net/socket.c:1861 [inline] __x64_sys_connect+0x6e/0xb0 net/socket.c:1861 do_syscall_64+0x38/0x90 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4605f9 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:00007f00b2ac0198 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 000000000052bfa0 RCX: 00000000004605f9 RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000007 RBP: 00000000004a9a99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000003 R14: 00000000004aa986 R15: 00007f00b2ac06bc irq event stamp: 202 hardirqs last enabled at (201): [] __local_bh_enable_ip+0x124/0x230 kernel/softirq.c:203 hardirqs last disabled at (199): [] __local_bh_enable_ip+0x181/0x230 kernel/softirq.c:180 softirqs last enabled at (200): [] lock_sock_nested+0x87/0x100 net/core/sock.c:3066 softirqs last disabled at (202): [] spin_lock_bh include/linux/spinlock.h:359 [inline] softirqs last disabled at (202): [] release_sock+0x1b/0x180 net/core/sock.c:3078 ---[ end trace 819a14f976abcd72 ]---