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From: Dan Carpenter <error27@gmail.com>
To: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Alessio Igor Bogani <abogani@texware.it>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	kernel-janitors@vger.kernel.org
Subject: [patch] usb: testing the wrong variable in fs_create_by_name()
Date: Thu, 22 Apr 2010 10:00:52 +0000	[thread overview]
Message-ID: <20100422100052.GT29647@bicker> (raw)

There is a typo here.  We should be testing "*dentry" which was just
assigned instead of "dentry".  This could result in dereferencing an
ERR_PTR inside either usbfs_mkdir() or usbfs_create().

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index 97b40ce..4a6366a 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -515,13 +515,13 @@ static int fs_create_by_name (const char *name, mode_t mode,
 	*dentry = NULL;
 	mutex_lock(&parent->d_inode->i_mutex);
 	*dentry = lookup_one_len(name, parent, strlen(name));
-	if (!IS_ERR(dentry)) {
+	if (!IS_ERR(*dentry)) {
 		if ((mode & S_IFMT) = S_IFDIR)
 			error = usbfs_mkdir (parent->d_inode, *dentry, mode);
 		else 
 			error = usbfs_create (parent->d_inode, *dentry, mode);
 	} else
-		error = PTR_ERR(dentry);
+		error = PTR_ERR(*dentry);
 	mutex_unlock(&parent->d_inode->i_mutex);
 
 	return error;

             reply	other threads:[~2010-04-22 10:00 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-04-22 10:00 Dan Carpenter [this message]
2010-04-22 16:24 ` [patch] usb: testing the wrong variable in fs_create_by_name() Greg KH

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