[PATCH 5.18 021/879] fs/ntfs3: provide block_invalidate_folio to fix memory leak

Greg Kroah-Hartman
2022-06-07T22:02:25Z

From: Mikulas Patocka <mpatocka@redhat.com>

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@yahoo.es>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Cc: stable@vger.kernel.org # v5.18
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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 = {