------------[ cut here ]------------ WARNING: CPU: 1 PID: 15543 at kernel/locking/lockdep.c:895 look_up_lock_class kernel/locking/lockdep.c:895 [inline] WARNING: CPU: 1 PID: 15543 at kernel/locking/lockdep.c:895 register_lock_class+0x206/0x1920 kernel/locking/lockdep.c:1244 Modules linked in: CPU: 1 PID: 15543 Comm: syz-executor.1 Not tainted 5.13.0-rc1-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+0x206/0x1920 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 1a 10 00 00 4d 3b 68 18 74 0b 49 81 38 40 ee 25 8a 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:ffff888125cef9b8 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 1ffff11024b9df40 RCX: ffffffff8ad021a0 RDX: 1ffff1102046901f RSI: 0000000000000000 RDI: ffff8881023480f8 RBP: ffff888125cefa88 R08: ffff8881023480e0 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000005fc R12: ffffffff8a9bd440 R13: ffffffff8843a980 R14: ffff888125cefa60 R15: ffffffff8afcf2e0 FS: 00007effba504700(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004bca6c CR3: 0000000103c5b001 CR4: 00000000001706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_acquire+0xff/0x53d0 kernel/locking/lockdep.c:4781 reacquire_held_locks+0x20a/0x510 kernel/locking/lockdep.c:5040 __lock_release kernel/locking/lockdep.c:5228 [inline] lock_release+0x3de/0x970 kernel/locking/lockdep.c:5532 sock_release_ownership include/net/sock.h:1577 [inline] release_sock+0x143/0x180 net/core/sock.c:3082 inet_autobind+0x116/0x160 net/ipv4/af_inet.c:189 inet_dgram_connect+0x17b/0x2c0 net/ipv4/af_inet.c:578 __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+0x40/0xb0 arch/x86/entry/common.c:47 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:00007effba504198 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: 00007effba5046bc irq event stamp: 196 hardirqs last enabled at (195): [] __local_bh_enable_ip+0x124/0x230 kernel/softirq.c:389 hardirqs last disabled at (193): [] __local_bh_enable_ip+0x181/0x230 kernel/softirq.c:366 softirqs last enabled at (194): [] spin_unlock_bh include/linux/spinlock.h:399 [inline] softirqs last enabled at (194): [] udp_lib_get_port+0x7b0/0x1870 net/ipv4/udp.c:339 softirqs last disabled at (196): [] spin_lock_bh include/linux/spinlock.h:359 [inline] softirqs last disabled at (196): [] release_sock+0x1b/0x180 net/core/sock.c:3072 ---[ end trace 25b931e065f1c456 ]---