linux-kernel - [PATCH -V1 04/22] vfs: check for directory early

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Date:	Sun, 27 Apr 2014 21:44:35 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	agruen@...nel.org, bfields@...ldses.org, akpm@...ux-foundation.org,
	viro@...iv.linux.org.uk, dhowells@...hat.com
Cc:	aneesh.kumar@...ux.vnet.ibm.com, linux-fsdevel@...r.kernel.org,
	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH -V1 04/22] vfs: check for directory early

From: Andreas Gruenbacher <agruen@...nel.org>

Signed-off-by: Andreas Gruenbacher <agruen@...nel.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
---
 fs/namei.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index c7fee619691f..7d93d195f0e5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3868,6 +3868,9 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
 	if (!inode)
 		return -ENOENT;
 
+	if (S_ISDIR(inode->i_mode))
+		return -EPERM;
+
 	error = may_create(dir, new_dentry);
 	if (error)
 		return error;
@@ -3882,8 +3885,6 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
 		return -EPERM;
 	if (!dir->i_op->link)
 		return -EPERM;
-	if (S_ISDIR(inode->i_mode))
-		return -EPERM;
 
 	error = security_inode_link(old_dentry, dir, new_dentry);
 	if (error)
-- 
1.9.1

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