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BUG: KCSAN: data-race in __delayacct_blkio_end / __delayacct_blkio_start

write to 0xffff888101a6da58 of 8 bytes by task 3507 on cpu 0:
 __delayacct_blkio_start+0x35/0x40 kernel/delayacct.c:61
 delayacct_blkio_start include/linux/delayacct.h:119 [inline]
 __schedule+0x18c/0x550 kernel/sched/core.c:4485
 schedule+0x7f/0xb0 kernel/sched/core.c:4601
 io_schedule+0x3b/0x50 kernel/sched/core.c:6295
 wait_on_page_bit_common+0x633/0x910 mm/filemap.c:1273
 __lock_page+0x5f/0x70 mm/filemap.c:1531
 lock_page include/linux/pagemap.h:611 [inline]
 write_cache_pages+0x29d/0x7f0 mm/page-writeback.c:2213
 fuse_writepages+0xd8/0x180 fs/fuse/file.c:2189
 do_writepages+0x7b/0x150 mm/page-writeback.c:2352
 __filemap_fdatawrite_range+0x19d/0x1d0 mm/filemap.c:422
 file_write_and_wait_range+0x9f/0x120 mm/filemap.c:761
 fuse_fsync+0xd3/0x2b0 fs/fuse/file.c:548
 vfs_fsync_range+0x107/0x120 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2723 [inline]
 generic_file_write_iter+0x103/0x130 mm/filemap.c:3476
 fuse_cache_write_iter fs/fuse/file.c:1271 [inline]
 fuse_file_write_iter+0x359/0x760 fs/fuse/file.c:1583
 call_write_iter include/linux/fs.h:1887 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x617/0x690 fs/read_write.c:605
 ksys_write+0xce/0x180 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:667
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888101a6da58 of 8 bytes by task 583 on cpu 1:
 delayacct_end kernel/delayacct.c:48 [inline]
 __delayacct_blkio_end+0x70/0xf0 kernel/delayacct.c:82
 delayacct_blkio_end include/linux/delayacct.h:125 [inline]
 try_to_wake_up+0x107/0x470 kernel/sched/core.c:2892
 wake_page_function+0xd9/0x200 mm/filemap.c:1080
 __wake_up_common+0xbc/0x130 kernel/sched/wait.c:93
 wake_up_page_bit+0xa4/0x190 mm/filemap.c:1113
 unlock_page+0x5e/0x70 mm/filemap.c:1465
 fuse_writepages_fill+0xbd0/0x1110 fs/fuse/file.c:2161
 write_cache_pages+0x4bc/0x7f0 mm/page-writeback.c:2246
 fuse_writepages+0xd8/0x180 fs/fuse/file.c:2189
 do_writepages+0x7b/0x150 mm/page-writeback.c:2352
 __writeback_single_inode+0x84/0x560 fs/fs-writeback.c:1461
 writeback_sb_inodes+0x6a0/0x1020 fs/fs-writeback.c:1721
 __writeback_inodes_wb+0xb0/0x2a0 fs/fs-writeback.c:1790
 wb_writeback+0x290/0x660 fs/fs-writeback.c:1896
 wb_check_background_flush fs/fs-writeback.c:1964 [inline]
 wb_do_writeback+0x583/0x5d0 fs/fs-writeback.c:2052
 wb_workfn+0xb8/0x410 fs/fs-writeback.c:2080
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272
 worker_thread+0x635/0xb90 kernel/workqueue.c:2418
 kthread+0x1fa/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 583 Comm: kworker/u4:4 Not tainted 5.10.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-0:55)
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