bond0 (unregistering): Released all slaves ------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 18381 at lib/refcount.c:31 refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31 Modules linked in: CPU: 1 PID: 18381 Comm: kworker/u4:9 Not tainted 5.16.0-rc2-next-20211125-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31 Code: 1d dc ee 99 09 31 ff 89 de e8 4d 1b 95 fd 84 db 75 e0 e8 64 17 95 fd 48 c7 c7 60 7e 04 8a c6 05 bc ee 99 09 01 e8 17 03 28 05 <0f> 0b eb c4 e8 48 17 95 fd 0f b6 1d ab ee 99 09 31 ff 89 de e8 18 RSP: 0018:ffffc9000207f9b0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888037e157c0 RSI: ffffffff815f3208 RDI: fffff5200040ff28 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815ecfae R11: 0000000000000000 R12: ffff8880764085b0 R13: ffffffff8d30f2a0 R14: ffff8880764085c0 R15: ffffffff8d30f2a0 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc23654e018 CR3: 000000006ff14000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_dec include/linux/refcount.h:344 [inline] refcount_dec include/linux/refcount.h:359 [inline] dev_put include/linux/netdevice.h:3815 [inline] linkwatch_do_dev+0x134/0x150 net/core/link_watch.c:169 linkwatch_forget_dev+0x16a/0x200 net/core/link_watch.c:238 netdev_wait_allrefs net/core/dev.c:9817 [inline] netdev_run_todo+0x402/0xa80 net/core/dev.c:9934 default_device_exit_batch+0x2ff/0x3c0 net/core/dev.c:10927 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:171 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:593 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2299 worker_thread+0x658/0x11f0 kernel/workqueue.c:2446 kthread+0x405/0x4f0 kernel/kthread.c:345 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295