linux-kernel - [PATCH 3.10 176/319] hostfs: Freeing an ERR_PTR in hostfs_fill_sb

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Message-Id: <1486322541-8206-77-git-send-email-w@1wt.eu>
Date:   Sun,  5 Feb 2017 20:19:58 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Richard Weinberger <richard@....at>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 176/319] hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 8a545f185145e3c09348cd74326268ecfc6715a3 upstream.

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>
Signed-off-by: Richard Weinberger <richard@....at>
Signed-off-by: Willy Tarreau <w@....eu>
---
 fs/hostfs/hostfs_kern.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index b58a9cb..f0faa87 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -942,10 +942,11 @@ 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;
-- 
2.8.0.rc2.1.gbe9624a