linux-kernel - [PATCH 25/27] sysfs: sysfs_setattr remove unnecessary permission check.

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Message-Id: <1260570289-6997-25-git-send-email-gregkh@suse.de>
Date:	Fri, 11 Dec 2009 14:24:47 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	"Eric W. Biederman" <ebiederm@...well.aristanetworks.com>,
	"Eric W. Biederman" <ebiederm@...stanetworks.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 25/27] sysfs: sysfs_setattr remove unnecessary permission check.

From: Eric W. Biederman <ebiederm@...well.aristanetworks.com>

inode_change_ok already clears the SGID bit when necessary
so there is no reason for sysfs_setattr to carry code to do
the same, and it is good to kill the extra copy because when
I moved the code last in certain corner cases the code will
look at the wrong gid.

Acked-by: Serge Hallyn <serue@...ibm.com>
Acked-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Eric W. Biederman <ebiederm@...stanetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 fs/sysfs/inode.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 9f783d4..220b758 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -117,10 +117,6 @@ int sysfs_setattr(struct dentry *dentry, struct iattr *iattr)
 		return error;
 
 	iattr->ia_valid &= ~ATTR_SIZE; /* ignore size changes */
-	if (iattr->ia_valid & ATTR_MODE) {
-		if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
-			iattr->ia_mode &= ~S_ISGID;
-	}
 
 	error = inode_setattr(inode, iattr);
 	if (error)
-- 
1.6.5.5

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