linux-kernel - [PATCH] cifs: fix another memleak, in cifs_root

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Message-Id: <1289423173-7044-1-git-send-email-oskar@scara.com>
Date:	Wed, 10 Nov 2010 21:06:13 +0000
From:	Oskar Schirmer <oskar@...ra.com>
To:	Steve French <sfrench@...ba.org>
Cc:	stable@...nel.org, linux-cifs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Suresh Jayaraman <sjayaraman@...e.de>,
	Andrew Hendry <andrew.hendry@...il.com>,
	Oskar Schirmer <oskar@...ra.com>
Subject: [PATCH] cifs: fix another memleak, in cifs_root_iget

cifs_root_iget allocates full_path through
cifs_build_path_to_root, but fails to kfree it upon
cifs_get_inode_info* failure.

Make all failure exit paths traverse clean up
handling at the end of the function.

Signed-off-by: Oskar Schirmer <oskar@...ra.com>
Cc: stable@...nel.org
---
 fs/cifs/inode.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index ef3a55b..ff7d299 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -881,8 +881,10 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
 		rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
 						xid, NULL);
 
-	if (!inode)
-		return ERR_PTR(rc);
+	if (!inode) {
+		inode = ERR_PTR(rc);
+		goto out;
+	}
 
 #ifdef CONFIG_CIFS_FSCACHE
 	/* populate tcon->resource_id */
@@ -898,13 +900,11 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
 		inode->i_uid = cifs_sb->mnt_uid;
 		inode->i_gid = cifs_sb->mnt_gid;
 	} else if (rc) {
-		kfree(full_path);
-		_FreeXid(xid);
 		iget_failed(inode);
-		return ERR_PTR(rc);
+		inode = ERR_PTR(rc);
 	}
 
-
+out:
 	kfree(full_path);
 	/* can not call macro FreeXid here since in a void func
 	 * TODO: This is no longer true
-- 
1.7.0.4

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