linux-kernel - [PATCH 14/13] sysfs: sysfs_setattr remove unnecessary permission check.

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Message-ID: <m1ljim1op9.fsf@fess.ebiederm.org>
Date:	Wed, 04 Nov 2009 04:04:02 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	Kay Sievers <kay.sievers@...y.org>, Greg KH <greg@...ah.com>,
	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	linux-fsdevel@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>,
	Benjamin LaHaise <bcrl@...et.ca>,
	Serge Hallyn <serue@...ibm.com>
Subject: [PATCH 14/13] sysfs: sysfs_setattr remove unnecessary permission check.


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, I goofed
and in certain corner cases the code will look at the wrong gid.

Signed-off-by: Eric W. Biederman <ebiederm@...stanetworks.com>
---
 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 72e2e99..e2595a7 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -120,10 +120,6 @@ 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)
-- 
1.6.5.2.143.g8cc62

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