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Subject[syzbot] WARNING: locking bug in __inet_bind
From
Hello,

syzbot found the following issue on:

HEAD commit: 7e062cda7d90 Merge tag 'net-next-5.19' of git://git.kernel..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11ae654df00000
kernel config: https://syzkaller.appspot.com/x/.config?x=e2c9c27babb4d679
dashboard link: https://syzkaller.appspot.com/bug?extid=089524dd375b122cfc88
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+089524dd375b122cfc88@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 11123 at kernel/locking/lockdep.c:906 look_up_lock_class+0x6a/0xd0 kernel/locking/lockdep.c:906
Modules linked in:
CPU: 0 PID: 11123 Comm: syz-executor.5 Not tainted 5.18.0-syzkaller-03023-g7e062cda7d90 #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:906
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 a0 13 2a 8f 74 02 <0f> 0b 5d c3 9c 5a 80 e6 02 74 c2 e8 36 10 83 fa 85 c0 74 1f 8b 05
RSP: 0018:ffffc9000551f888 EFLAGS: 00010006
RAX: ffffffff900e6720 RBX: ffffffff905eb8c0 RCX: ffffffff8aee8220
RDX: 0000000000000046 RSI: ffffffff90965fa0 RDI: ffff88806cacd070
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88806cacd070 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fd663eb2700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd662d9c028 CR3: 000000007854a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
register_lock_class+0xbe/0x11b0 kernel/locking/lockdep.c:1256
__lock_acquire+0x10a/0x56c0 kernel/locking/lockdep.c:4901
lock_acquire kernel/locking/lockdep.c:5634 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5599
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:354 [inline]
__lock_sock+0x145/0x260 net/core/sock.c:2826
lock_sock_nested+0xd6/0xf0 net/core/sock.c:3394
lock_sock include/net/sock.h:1691 [inline]
__inet_bind+0x8c4/0xc90 net/ipv4/af_inet.c:511
inet_bind+0x173/0x220 net/ipv4/af_inet.c:456
__sys_bind+0x1e9/0x250 net/socket.c:1776
__do_sys_bind net/socket.c:1787 [inline]
__se_sys_bind net/socket.c:1785 [inline]
__x64_sys_bind+0x6f/0xb0 net/socket.c:1785
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+0x46/0xb0
RIP: 0033:0x7fd662c89109
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd663eb2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00007fd662d9bf60 RCX: 00007fd662c89109
RDX: 0000000000000010 RSI: 00000000200001c0 RDI: 0000000000000015
RBP: 00007fd662ce308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd235ff65f R14: 00007fd663eb2300 R15: 0000000000022000
</TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

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