linux-kernel - [PATCH AUTOSEL 5.14 05/25] gfs2: Switch to may_setattr in gfs2

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Message-Id: <20210913223339.435347-5-sashal@kernel.org>
Date:   Mon, 13 Sep 2021 18:33:19 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Andreas Gruenbacher <agruenba@...hat.com>,
        Bob Peterson <rpeterso@...hat.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Sasha Levin <sashal@...nel.org>, cluster-devel@...hat.com
Subject: [PATCH AUTOSEL 5.14 05/25] gfs2: Switch to may_setattr in gfs2_setattr

From: Andreas Gruenbacher <agruenba@...hat.com>

[ Upstream commit d75b9fa053e4cd278281386d860c26fdbfbe9d03 ]

The permission check in gfs2_setattr is an old and outdated version of
may_setattr().  Switch to the updated version.

Fixes fstest generic/079.

Signed-off-by: Andreas Gruenbacher <agruenba@...hat.com>
Signed-off-by: Bob Peterson <rpeterso@...hat.com>
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/gfs2/inode.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 6e15434b23ac..3130f85d2b3f 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1985,8 +1985,8 @@ static int gfs2_setattr(struct user_namespace *mnt_userns,
 	if (error)
 		goto out;
 
-	error = -EPERM;
-	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+	error = may_setattr(&init_user_ns, inode, attr->ia_valid);
+	if (error)
 		goto error;
 
 	error = setattr_prepare(&init_user_ns, dentry, attr);
-- 
2.30.2