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BUG: KCSAN: data-race in __lru_add_drain_all / __pagevec_lru_add

write to 0xffff888237c27998 of 1 bytes by task 1819 on cpu 0:
 pagevec_reinit include/linux/pagevec.h:57 [inline]
 __pagevec_lru_add+0x243/0x270 mm/swap.c:1076
 lru_add_drain_cpu+0x6a/0x260 mm/swap.c:613
 lru_add_drain mm/swap.c:717 [inline]
 __pagevec_release+0x4b/0xc0 mm/swap.c:997
 pagevec_release include/linux/pagevec.h:82 [inline]
 write_cache_pages+0x699/0x7f0 mm/page-writeback.c:2294
 generic_writepages+0x7c/0xc0 mm/page-writeback.c:2346
 blkdev_writepages+0x19/0x20 block/fops.c:428
 do_writepages+0x1cb/0x330 mm/page-writeback.c:2364
 filemap_fdatawrite_wbc mm/filemap.c:395 [inline]
 __filemap_fdatawrite_range mm/filemap.c:428 [inline]
 __filemap_fdatawrite mm/filemap.c:434 [inline]
 filemap_flush+0xd9/0x100 mm/filemap.c:461
 sync_blockdev_nowait+0x32/0x40 block/bdev.c:192
 sync_filesystem+0xc9/0x150 fs/sync.c:57
 generic_shutdown_super+0x40/0x250 fs/super.c:448
 kill_block_super+0x4a/0x90 fs/super.c:1397
 deactivate_locked_super+0x6a/0xb0 fs/super.c:335
 deactivate_super+0x85/0x90 fs/super.c:366
 cleanup_mnt+0x267/0x2d0 fs/namespace.c:1143
 __cleanup_mnt+0x15/0x20 fs/namespace.c:1150
 task_work_run+0x8e/0x110 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x160/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888237c27998 of 1 bytes by task 1904 on cpu 1:
 pagevec_count include/linux/pagevec.h:62 [inline]
 __lru_add_drain_all+0x12c/0x3e0 mm/swap.c:835
 lru_add_drain_all+0xc/0x10 mm/swap.c:857
 invalidate_bdev+0x56/0x80 block/bdev.c:88
 invalidate_disk+0x25/0xb0 block/genhd.c:651
 __loop_clr_fd+0x3d1/0x5d0 drivers/block/loop.c:1142
 loop_rundown_workfn+0x3e/0xb0 drivers/block/loop.c:1185
 process_one_work+0x3f6/0x960 kernel/workqueue.c:2307
 worker_thread+0x616/0xa70 kernel/workqueue.c:2454
 kthread+0x2c7/0x2e0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

value changed: 0x0b -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1904 Comm: kworker/1:3 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_long loop_rundown_workfn
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