EXT4-fs (loop4): failed to initialize system zone (-22)
EXT4-fs (loop4): mount failed
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BUG: KCSAN: data-race in kick_pool / wq_worker_running

read-write to 0xffff888237d299a4 of 4 bytes by task 36 on cpu 1:
 wq_worker_running+0x98/0x130 kernel/workqueue.c:1400
 schedule_timeout+0x58/0x170 kernel/time/sleep_timeout.c:75
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0xff/0x1e0 kernel/sched/completion.c:127
 wait_for_completion_killable+0x18/0x40 kernel/sched/completion.c:254
 __kthread_create_on_node+0x1b7/0x240 kernel/kthread.c:536
 kthread_create_on_node+0x8c/0xc0 kernel/kthread.c:588
 ip_vs_est_kthread_start+0xd8/0x1c0 net/netfilter/ipvs/ip_vs_est.c:259
 est_reload_work_handler+0x1c0/0x2a0 net/netfilter/ipvs/ip_vs_ctl.c:269
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4de/0xa20 kernel/workqueue.c:3319
 worker_thread+0x52c/0x710 kernel/workqueue.c:3400
 kthread+0x4b7/0x540 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 to 0xffff888237d299a4 of 4 bytes by task 21444 on cpu 0:
 need_more_worker kernel/workqueue.c:934 [inline]
 kick_pool+0x4d/0x2c0 kernel/workqueue.c:1240
 __queue_work+0x8f8/0xbb0 kernel/workqueue.c:2342
 queue_work_on+0xdf/0x190 kernel/workqueue.c:2392
 __lru_add_drain_all+0x2c0/0x3f0 mm/swap.c:869
 lru_add_drain_all+0x10/0x20 mm/swap.c:883
 invalidate_bdev+0x47/0x70 block/bdev.c:101
 __ext4_fill_super fs/ext4/super.c:5701 [inline]
 ext4_fill_super+0x1551/0x3580 fs/ext4/super.c:5726
 get_tree_bdev_flags+0x2b4/0x330 fs/super.c:1636
 get_tree_bdev+0x1f/0x30 fs/super.c:1659
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5758
 vfs_get_tree+0x56/0x1e0 fs/super.c:1759
 do_new_mount+0x246/0x6b0 fs/namespace.c:3881
 path_mount+0x49b/0xb30 fs/namespace.c:4208
 do_mount fs/namespace.c:4221 [inline]
 __do_sys_mount fs/namespace.c:4432 [inline]
 __se_sys_mount+0x28f/0x2e0 fs/namespace.c:4409
 __x64_sys_mount+0x67/0x80 fs/namespace.c:4409
 x64_sys_call+0xd11/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0x1a0 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: 0 UID: 0 PID: 21444 Comm: syz.4.8357 Not tainted 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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