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

From: Greg Kroah-Hartman
Date: Mon Sep 12 2016 - 11:31:53 EST

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


From: Richard Weinberger <richard@xxxxxx>

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@xxxxxxxxxx>
Fixes: 2b88fc21ca ("ubifs: Switch to generic xattr handlers")
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Reviewed-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Tested-by: Dongsheng Yang <dongsheng081251@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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);