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BUG: KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes

write to 0xffff88810e791758 of 8 bytes by task 8 on cpu 0:
 writeback_sb_inodes+0x4a1/0xff0 fs/fs-writeback.c:1721
 __writeback_inodes_wb+0xb0/0x2b0 fs/fs-writeback.c:1801
 wb_writeback+0x290/0x660 fs/fs-writeback.c:1907
 wb_check_background_flush fs/fs-writeback.c:1975 [inline]
 wb_do_writeback+0x583/0x5d0 fs/fs-writeback.c:2063
 wb_workfn+0xc8/0x430 fs/fs-writeback.c:2091
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x616/0xa70 kernel/workqueue.c:2421
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff88810e791758 of 8 bytes by task 10168 on cpu 1:
 __mark_inode_dirty+0xd8/0x6f0 fs/fs-writeback.c:2295
 __set_page_dirty_nobuffers+0x24f/0x2c0 mm/page-writeback.c:2496
 set_page_dirty+0x104/0x200 mm/page-writeback.c:2580
 fuse_write_end+0x314/0x460 fs/fuse/file.c:2288
 generic_perform_write+0x23e/0x3a0 mm/filemap.c:3586
 __generic_file_write_iter+0x15c/0x340 mm/filemap.c:3704
 generic_file_write_iter+0x75/0x130 mm/filemap.c:3736
 fuse_cache_write_iter fs/fuse/file.c:1288 [inline]
 fuse_file_write_iter+0x617/0x850 fs/fuse/file.c:1601
 call_write_iter include/linux/fs.h:1977 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x6f9/0x7e0 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+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10168 Comm: syz-executor.3 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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