netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
     netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1339
     netlink_sendmsg+0x648/0x930 net/netlink/af_netlink.c:1883
     sock_sendmsg_nosec net/socket.c:712 [inline]
     __sock_sendmsg net/socket.c:727 [inline]
     __sys_sendto+0x36c/0x4f4 net/socket.c:2180
     __do_sys_sendto net/socket.c:2187 [inline]
     __se_sys_sendto net/socket.c:2183 [inline]
     __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2183
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6783 at lib/ref_tracker.c:179 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
WARNING: CPU: 1 PID: 6783 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x34c/0x454 lib/ref_tracker.c:178
Modules linked in:
CPU: 1 UID: 0 PID: 6783 Comm: kworker/u8:11 Not tainted 6.15.0-rc7-syzkaller-g187899f4124a #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ref_tracker_dir_exit+0x34c/0x454 include/linux/spinlock.h:406
lr : spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
lr : ref_tracker_dir_exit+0x34c/0x454 lib/ref_tracker.c:178
sp : ffff8000a3937640
x29: ffff8000a3937670 x28: 0000000000000000 x27: ffff0000fc14e610
x26: dfff800000000000 x25: ffff0000fc14e660 x24: dead000000000100
x23: ffff0000fc14e660 x22: ffff0000c5766a00 x21: ffff0000fc14e660
x20: ffff0000fc14e660 x19: 1fffe00018aecd40 x18: 1fffe0003386f276
x17: ffff80008f31e000 x16: ffff80008adbe9e4 x15: 0000000000000001
x14: 1fffe00033871ce8 x13: 0000000000000000 x12: 0000000000000000
x11: ffff800092d38c40 x10: 0000000000000003 x9 : b36866bdcb444900
x8 : 0000000000000010 x7 : ffff800080485878 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010
x2 : 0000000000000007 x1 : ffff80008b3ebc00 x0 : 0000000000000001
Call trace:
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] (P)
 ref_tracker_dir_exit+0x34c/0x454 lib/ref_tracker.c:178 (P)
 free_netdev+0x3c8/0x5f8 net/core/dev.c:11770
 netdev_run_todo+0xb70/0xd24 net/core/dev.c:11302
 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:157
 default_device_exit_batch+0x83c/0x8b4 net/core/dev.c:12531
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x650/0x9c0 net/core/net_namespace.c:654
 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x958/0xed8 kernel/workqueue.c:3400
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847
irq event stamp: 2179786
hardirqs last  enabled at (2179785): [<ffff80008048590c>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1525 [inline]
hardirqs last  enabled at (2179785): [<ffff80008048590c>] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5130
hardirqs last disabled at (2179786): [<ffff80008adb9eb8>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:511
softirqs last  enabled at (2177454): [<ffff800089102264>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (2177454): [<ffff800089102264>] netif_addr_unlock_bh include/linux/netdevice.h:4804 [inline]
softirqs last  enabled at (2177454): [<ffff800089102264>] dev_mc_flush+0x1b0/0x1f4 net/core/dev_addr_lists.c:1037
softirqs last disabled at (2177452): [<ffff800089102794>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered forwarding state