BUG: KCSAN: data-race in __filemap_add_folio / invalidate_bdev

read-write to 0xffff8881004aac48 of 8 bytes by task 1915 on cpu 0:
 __filemap_add_folio+0x2d9/0x7f0 mm/filemap.c:904
 filemap_add_folio+0x6b/0x150 mm/filemap.c:959
 page_cache_ra_unbounded+0x19e/0x2e0 mm/readahead.c:243
 do_page_cache_ra mm/readahead.c:291 [inline]
 force_page_cache_ra+0x1c6/0x200 mm/readahead.c:322
 page_cache_sync_ra+0xc8/0xf0 mm/readahead.c:691
 page_cache_sync_readahead include/linux/pagemap.h:1234 [inline]
 filemap_get_pages mm/filemap.c:2592 [inline]
 filemap_read+0x3e5/0x1400 mm/filemap.c:2679
 blkdev_read_iter+0x2c6/0x370 block/fops.c:594
 call_read_iter include/linux/fs.h:2052 [inline]
 new_sync_read fs/read_write.c:401 [inline]
 vfs_read+0x5a5/0x6a0 fs/read_write.c:482
 ksys_read+0xe8/0x1a0 fs/read_write.c:620
 __do_sys_read fs/read_write.c:630 [inline]
 __se_sys_read fs/read_write.c:628 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:628
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

read to 0xffff8881004aac48 of 8 bytes by task 1836 on cpu 1:
 invalidate_bdev+0x31/0x80 block/bdev.c:85
 cleanup_mnt+0x267/0x2d0 fs/namespace.c:1186
 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

value changed: 0x000000000000007d -> 0x0000000000000081
==================================================================
EXT4-fs unmount: 1727 callbacks suppressed
EXT4-fs (loop2): unmounting filesystem.