linux-kernel - [patch] hostfs: freeing an ERR_PTR in hostfs_fill_sb

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Message-ID: <20160713101234.GG29468@mwanda>
Date:	Wed, 13 Jul 2016 13:12:34 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Jeff Dike <jdike@...toit.com>, Al Viro <viro@...iv.linux.org.uk>
Cc:	Richard Weinberger <richard@....at>,
	user-mode-linux-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [patch] hostfs: freeing an ERR_PTR in hostfs_fill_sb_common()

We can't pass error pointers to kfree() or it causes an oops.

Fixes: 52b209f7b848 ('get rid of hostfs_read_inode()')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 5c57654..90e46cd 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -959,10 +959,11 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
 
 	if (S_ISLNK(root_inode->i_mode)) {
 		char *name = follow_link(host_root_path);
-		if (IS_ERR(name))
+		if (IS_ERR(name)) {
 			err = PTR_ERR(name);
-		else
-			err = read_name(root_inode, name);
+			goto out_put;
+		}
+		err = read_name(root_inode, name);
 		kfree(name);
 		if (err)
 			goto out_put;