WARNING: locking bug in __dev_close

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING: locking bug in __dev_close_many net	4				23	230d	340d	0/29	closed as invalid on 2025/02/11 09:27
bridge0: port 2(bridge_slave_1) entered disabled state
bridge_slave_0: left allmulticast mode
bridge_slave_0: left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 1 PID: 6233 at kernel/locking/lockdep.c:234 hlock_class kernel/locking/lockdep.c:234 [inline]
WARNING: CPU: 1 PID: 6233 at kernel/locking/lockdep.c:234 check_wait_context kernel/locking/lockdep.c:4852 [inline]
WARNING: CPU: 1 PID: 6233 at kernel/locking/lockdep.c:234 __lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178
Modules linked in:
CPU: 1 UID: 0 PID: 6233 Comm: kworker/u8:15 Not tainted 6.14.0-rc2-syzkaller-00303-gad1b832bf1cf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: netns cleanup_net
RIP: 0010:hlock_class kernel/locking/lockdep.c:234 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4852 [inline]
RIP: 0010:__lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178
Code: 00 00 83 3d 81 2d 9f 0e 00 75 23 90 48 c7 c7 e0 a2 2a 8c 48 c7 c6 e0 a5 2a 8c e8 07 c2 e4 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f
RSP: 0018:ffffc9000c3f7350 EFLAGS: 00010046
RAX: 496e164656bad200 RBX: 0000000000000fd4 RCX: ffff888059fb9e00
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000c0fd4 R08: ffffffff81817d42 R09: 1ffff110170e519a
R10: dffffc0000000000 R11: ffffed10170e519b R12: ffff888059fba8d4
R13: 0000000000000014 R14: 1ffff1100b3f7536 R15: ffff888059fba9b0
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb311cd7d60 CR3: 0000000035dee000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 down+0x39/0xc0 kernel/locking/semaphore.c:59
 __dev_close_many+0x106/0x350 net/core/dev.c:1660
 dev_close_many+0x24e/0x4c0 net/core/dev.c:1713
 unregister_netdevice_many_notify+0x52d/0x1f10 net/core/dev.c:11774
 cleanup_net+0x76d/0xd60 net/core/net_namespace.c:647
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>