linux-kernel - [PATCH 5.18 021/879] fs/ntfs3: provide block_invalidate

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Date:   Tue,  7 Jun 2022 18:52:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        José Luis Lara Carrascal 
        <manualinux@...oo.es>, Mikulas Patocka <mpatocka@...hat.com>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Namjae Jeon <linkinjeon@...nel.org>,
        Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Subject: [PATCH 5.18 021/879] fs/ntfs3: provide block_invalidate_folio to fix memory leak

From: Mikulas Patocka <mpatocka@...hat.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@...oo.es>
Signed-off-by: Mikulas Patocka <mpatocka@...hat.com>
Acked-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Reviewed-by: Namjae Jeon <linkinjeon@...nel.org>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Cc: stable@...r.kernel.org  # v5.18
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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 = {