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BUG: KCSAN: data-race in kick_pool / wq_worker_running

read-write to 0xffff888237c29d64 of 4 bytes by task 3395 on cpu 0:
 wq_worker_running+0x95/0x120 kernel/workqueue.c:1404
 synchronize_rcu_expedited+0x611/0x790 kernel/rcu/tree_exp.h:972
 synchronize_rcu+0x45/0x320 kernel/rcu/tree.c:3352
 xfrm_state_gc_task+0x96/0x4a0 net/xfrm/xfrm_state.c:631
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0x4cb/0x9d0 kernel/workqueue.c:3319
 worker_thread+0x582/0x770 kernel/workqueue.c:3400
 kthread+0x489/0x510 kernel/kthread.c:463
 ret_from_fork+0x11f/0x1b0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888237c29d64 of 4 bytes by task 6146 on cpu 1:
 need_more_worker kernel/workqueue.c:938 [inline]
 kick_pool+0x49/0x2d0 kernel/workqueue.c:1244
 __queue_work+0x8cb/0xb50 kernel/workqueue.c:2340
 queue_work_on+0xd1/0x160 kernel/workqueue.c:2390
 __lru_add_drain_all+0x2c6/0x3f0 mm/swap.c:874
 lru_add_drain_all+0x10/0x20 mm/swap.c:888
 invalidate_bdev+0x47/0x70 block/bdev.c:101
 bdev_disk_changed+0xeb/0xcb0 block/partitions/core.c:657
 loop_reread_partitions drivers/block/loop.c:449 [inline]
 loop_set_status+0x5d2/0x6a0 drivers/block/loop.c:1274
 loop_set_status64 drivers/block/loop.c:1370 [inline]
 lo_ioctl+0x671/0x12b0 drivers/block/loop.c:1556
 blkdev_ioctl+0x34f/0x440 block/ioctl.c:705
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xce/0x140 fs/ioctl.c:584
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:584
 x64_sys_call+0x1816/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 6146 Comm: syz.3.886 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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Alternate GPT is invalid, using primary GPT.
 loop3: p1 p2 p3