linux-kernel - [PATCH 4.7 36/59] ubifs: Fix xattr generic handler usage

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Message-Id: <20160912152130.284818105@linuxfoundation.org>
Date:   Mon, 12 Sep 2016 17:29:56 +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, Andreas Gruenbacher <agruenba@...hat.com>,
        Richard Weinberger <richard@....at>,
        Dongsheng Yang <dongsheng081251@...il.com>
Subject: [PATCH 4.7 36/59] ubifs: Fix xattr generic handler usage

4.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Richard Weinberger <richard@....at>

commit 17ce1eb0b64eb27d4f9180daae7495fa022c7b0d upstream.

UBIFS uses full names to work with xattrs, therefore we have to use
xattr_full_name() to obtain the xattr prefix as string.

Cc: Andreas Gruenbacher <agruenba@...hat.com>
Fixes: 2b88fc21ca ("ubifs: Switch to generic xattr handlers")
Signed-off-by: Richard Weinberger <richard@....at>
Reviewed-by: Andreas Gruenbacher <agruenba@...hat.com>
Tested-by: Dongsheng Yang <dongsheng081251@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ubifs/xattr.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -575,7 +575,8 @@ static int ubifs_xattr_get(const struct
 	dbg_gen("xattr '%s', ino %lu ('%pd'), buf size %zd", name,
 		inode->i_ino, dentry, size);
 
-	return  __ubifs_getxattr(inode, name, buffer, size);
+	name = xattr_full_name(handler, name);
+	return __ubifs_getxattr(inode, name, buffer, size);
 }
 
 static int ubifs_xattr_set(const struct xattr_handler *handler,
@@ -586,6 +587,8 @@ static int ubifs_xattr_set(const struct
 	dbg_gen("xattr '%s', host ino %lu ('%pd'), size %zd",
 		name, inode->i_ino, dentry, size);
 
+	name = xattr_full_name(handler, name);
+
 	if (value)
 		return __ubifs_setxattr(inode, name, value, size, flags);
 	else