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BUG: KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark

write to 0xffff88810107b674 of 4 bytes by task 31377 on cpu 0:
 xa_mark_set lib/xarray.c:69 [inline]
 xas_set_mark+0x11e/0x130 lib/xarray.c:889
 tag_pages_for_writeback+0xad/0x2f0 mm/page-writeback.c:2133
 write_cache_pages+0x1a8/0x840 mm/page-writeback.c:2203
 generic_writepages+0x7c/0xc0 mm/page-writeback.c:2346
 blkdev_writepages+0x19/0x20 block/fops.c:374
 do_writepages+0x26b/0x3c0 mm/page-writeback.c:2364
 filemap_fdatawrite_wbc mm/filemap.c:400 [inline]
 __filemap_fdatawrite_range mm/filemap.c:433 [inline]
 filemap_write_and_wait_range+0x238/0x3c0 mm/filemap.c:704
 filemap_write_and_wait include/linux/fs.h:2865 [inline]
 __sync_blockdev block/bdev.c:193 [inline]
 sync_blockdev+0x3e/0x50 block/bdev.c:202
 dquot_quota_sync+0xc6/0x310 fs/quota/dquot.c:695
 quota_sync_one+0x7f/0xa0 fs/quota/quota.c:59
 iterate_supers+0x137/0x1f0 fs/super.c:695
 quota_sync_all fs/quota/quota.c:68 [inline]
 __do_sys_quotactl fs/quota/quota.c:936 [inline]
 __se_sys_quotactl+0x27c/0x550 fs/quota/quota.c:915
 __x64_sys_quotactl+0x51/0x60 fs/quota/quota.c:915
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88810107b674 of 4 bytes by task 31381 on cpu 1:
 xa_marked include/linux/xarray.h:418 [inline]
 mapping_tagged include/linux/fs.h:496 [inline]
 filemap_fdatawrite_wbc mm/filemap.c:396 [inline]
 __filemap_fdatawrite_range mm/filemap.c:433 [inline]
 filemap_write_and_wait_range+0x206/0x3c0 mm/filemap.c:704
 filemap_write_and_wait include/linux/fs.h:2865 [inline]
 __sync_blockdev block/bdev.c:193 [inline]
 sync_blockdev+0x3e/0x50 block/bdev.c:202
 dquot_quota_sync+0xc6/0x310 fs/quota/dquot.c:695
 quota_sync_one+0x7f/0xa0 fs/quota/quota.c:59
 iterate_supers+0x137/0x1f0 fs/super.c:695
 quota_sync_all fs/quota/quota.c:68 [inline]
 __do_sys_quotactl fs/quota/quota.c:936 [inline]
 __se_sys_quotactl+0x27c/0x550 fs/quota/quota.c:915
 __x64_sys_quotactl+0x51/0x60 fs/quota/quota.c:915
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x02000021 -> 0x0e000021

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 31381 Comm: syz-executor.2 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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