linux-kernel - [PATCH 1/2] sysfs: fix condition check in sysfs_drop

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Message-ID: <464C9675.3030101@gmail.com>
Date:	Thu, 17 May 2007 19:52:53 +0200
From:	Tejun Heo <htejun@...il.com>
To:	maneesh@...ibm.com
CC:	Greg KH <greg@...ah.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Clemens Schwaighofer <cs@...uila.co.jp>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Dipankar Sarma <dipankar@...ibm.com>,
	Chuck Ebbert <cebbert@...hat.com>
Subject: [PATCH 1/2] sysfs: fix condition check in sysfs_drop_dentry()

The condition check doesn't make much sense as it basically always
succeeds.  This causes NULL dereferencing on certain cases.  It seems
that parentheses are put in the wrong place.  Fix it.

DON'T APPLY JUST YET
---

Maneesh, is this correct?

 fs/sysfs/inode.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: work/fs/sysfs/inode.c
===================================================================
--- work.orig/fs/sysfs/inode.c
+++ work/fs/sysfs/inode.c
@@ -250,7 +250,7 @@ void sysfs_drop_dentry(struct sysfs_dire
 	if (dentry) {
 		spin_lock(&dcache_lock);
 		spin_lock(&dentry->d_lock);
-		if (!(d_unhashed(dentry) && dentry->d_inode)) {
+		if (!d_unhashed(dentry) && dentry->d_inode) {
 			inode = dentry->d_inode;
 			spin_lock(&inode->i_lock);
 			__iget(inode);
-
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