------------[ cut here ]------------ WARNING: CPU: 0 PID: 10450 at kernel/locking/lockdep.c:853 look_up_lock_class kernel/locking/lockdep.c:853 [inline] WARNING: CPU: 0 PID: 10450 at kernel/locking/lockdep.c:853 register_lock_class+0x1f0/0x1630 kernel/locking/lockdep.c:1201 Modules linked in: CPU: 0 PID: 10450 Comm: syz-executor.0 Not tainted 5.9.0-rc3-next-20200903-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:853 [inline] RIP: 0010:register_lock_class+0x1f0/0x1630 kernel/locking/lockdep.c:1201 Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 fd 0f 00 00 4d 3b 67 18 74 0b 49 81 3f c0 54 f9 8b 74 02 <0f> 0b 85 ed 0f 84 b2 00 00 00 f6 44 24 04 01 0f 85 a7 00 00 00 83 RSP: 0018:ffffc90009c87a40 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 1ffff92001390f4f RCX: ffffffff8ca694c0 RDX: 1ffff11012512f17 RSI: 0000000000000000 RDI: ffff8880928978b8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: fffffbfff15796c1 R11: 0000000000000000 R12: ffffffff88ff3920 R13: ffffffff8d6039e0 R14: ffffffff8c6ee410 R15: ffff8880928978a0 FS: 00007f7296ac1700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7296ac0db8 CR3: 00000000a7528000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_acquire+0xf9/0x5570 kernel/locking/lockdep.c:4305 lock_acquire+0x1f3/0xae0 kernel/locking/lockdep.c:5006 __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+0x3b/0x110 net/core/sock.c:3034 lock_sock include/net/sock.h:1583 [inline] inet_autobind+0x1a/0x190 net/ipv4/af_inet.c:180 inet_dgram_connect+0x245/0x2d0 net/ipv4/af_inet.c:575 __sys_connect_file+0x155/0x1a0 net/socket.c:1852 __sys_connect+0x161/0x190 net/socket.c:1869 __do_sys_connect net/socket.c:1879 [inline] __se_sys_connect net/socket.c:1876 [inline] __x64_sys_connect+0x6f/0xb0 net/socket.c:1876 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7296ac0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000002300 RCX: 000000000045d5b9 RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000004 RBP: 000000000118d020 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec R13: 00007ffc0747c19f R14: 00007f7296ac19c0 R15: 000000000118cfec