syzbot

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BUG: KCSAN: data-race in process_scheduled_works / process_scheduled_works

read-write to 0xffff88810107f8b0 of 8 bytes by task 12 on cpu 1:
 process_one_work kernel/workqueue.c:3244 [inline]
 process_scheduled_works+0x4fe/0x9d0 kernel/workqueue.c:3319
 worker_thread+0x582/0x770 kernel/workqueue.c:3400
 kthread+0x486/0x510 kernel/kthread.c:464
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read-write to 0xffff88810107f8b0 of 8 bytes by task 23894 on cpu 0:
 process_one_work kernel/workqueue.c:3244 [inline]
 process_scheduled_works+0x4fe/0x9d0 kernel/workqueue.c:3319
 worker_thread+0x582/0x770 kernel/workqueue.c:3400
 kthread+0x486/0x510 kernel/kthread.c:464
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x00000000000000c1 -> 0x00000000000000c2

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 23894 Comm: kworker/u8:10 Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: iou_exit io_ring_exit_work
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