From: Mikulas Patocka <mpatocka@xxxxxxxxxx> commit 724bbe49c5e427cb077357d72d240a649f2e4054 upstream. The ntfs3 filesystem lacks the 'invalidate_folio' method and it causes memory leak. If you write to the filesystem and then unmount it, the cached written data are not freed and they are permanently leaked. Fixes: 7ba13abbd31e ("fs: Turn block_invalidatepage into block_invalidate_folio") Reported-by: José Luis Lara Carrascal <manualinux@xxxxxxxx> Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx> Acked-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Reviewed-by: Namjae Jeon <linkinjeon@xxxxxxxxxx> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # v5.18 Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/ntfs3/inode.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -1951,6 +1951,7 @@ const struct address_space_operations nt .direct_IO = ntfs_direct_IO, .bmap = ntfs_bmap, .dirty_folio = block_dirty_folio, + .invalidate_folio = block_invalidate_folio, }; const struct address_space_operations ntfs_aops_cmpr = {