------------[ cut here ]------------ WARNING: CPU: 0 PID: 40 at lib/ref_tracker.c:179 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] WARNING: CPU: 0 PID: 40 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x390/0x4b4 lib/ref_tracker.c:178 Modules linked in: CPU: 0 PID: 40 Comm: kworker/u4:2 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: netns cleanup_net pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ref_tracker_dir_exit+0x390/0x4b4 include/linux/spinlock.h:406 lr : spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] lr : ref_tracker_dir_exit+0x390/0x4b4 lib/ref_tracker.c:178 sp : ffff800093e67980 x29: ffff800093e67a00 x28: ffff0000cd2001e0 x27: 1ffff000127ccf34 x26: dfff800000000000 x25: ffff0000cd200230 x24: dead000000000100 x23: ffff0000cd200230 x22: ffff0000cd2001e0 x21: ffff0000cd200230 x20: ffff0000cd200230 x19: 1fffe00018d86e60 x18: 1fffe000367fff96 x17: ffff80008ec9d000 x16: ffff80008032116c x15: 0000000000000001 x14: 1fffe000368027e8 x13: 0000000000000000 x12: 0000000000000003 x11: 0000000000000001 x10: 0000000000000003 x9 : 0000000000000001 x8 : 0000000000000008 x7 : ffff800080297c0c x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff80008aedea60 x0 : ffff800125414000 Call trace: spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] ref_tracker_dir_exit+0x390/0x4b4 lib/ref_tracker.c:178 net_free+0x80/0xf4 net/core/net_namespace.c:452 cleanup_net+0x82c/0x8d0 net/core/net_namespace.c:639 process_one_work+0x694/0x1204 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2787 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 irq event stamp: 2486558 hardirqs last enabled at (2486557): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1397 [inline] hardirqs last enabled at (2486557): [] finish_lock_switch+0xbc/0x1e4 kernel/sched/core.c:5154 hardirqs last disabled at (2486558): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:470 softirqs last enabled at (2486554): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (2486554): [] __do_softirq+0xac8/0xce4 kernel/softirq.c:582 softirqs last disabled at (2486531): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]---