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BUG: KCSAN: assert: race in __block_task kernel/sched/sched.h:2634 [inline]
BUG: KCSAN: assert: race in dequeue_entities+0x6df/0x760 kernel/sched/fair.c:7168

race at unknown origin, with assert no writes to 0xffff8881001cb1e8 of 4 bytes by task 2714 on cpu 1:
 __block_task kernel/sched/sched.h:2634 [inline]
 dequeue_entities+0x6df/0x760 kernel/sched/fair.c:7168
 pick_next_entity kernel/sched/fair.c:5618 [inline]
 pick_task_fair kernel/sched/fair.c:8847 [inline]
 pick_next_task_fair+0x7d/0x410 kernel/sched/fair.c:8867
 __pick_next_task kernel/sched/core.c:5888 [inline]
 pick_next_task kernel/sched/core.c:6410 [inline]
 __schedule+0x27c/0x940 kernel/sched/core.c:6561
 __schedule_loop kernel/sched/core.c:6684 [inline]
 schedule+0x55/0xc0 kernel/sched/core.c:6699
 synchronize_rcu_expedited+0x611/0x7a0 kernel/rcu/tree_exp.h:991
 synchronize_net net/core/dev.c:11278 [inline]
 unregister_netdevice_many_notify+0xf13/0x11b0 net/core/dev.c:11440
 unregister_netdevice_many+0x19/0x20 net/core/dev.c:11461
 cleanup_net+0x411/0x810 net/core/net_namespace.c:621
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3310
 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 2714 Comm: kworker/u8:17 Tainted: G        W          6.11.0-syzkaller-07337-g2004cef11ea0 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: netns cleanup_net
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