linux-kernel - [PATCH 4.11 043/150] ovl: fix creds leak in copy up error path

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Message-Id: <20170612152521.308024401@linuxfoundation.org>
Date:   Mon, 12 Jun 2017 17:24:10 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Amir Goldstein <amir73il@...il.com>,
        Miklos Szeredi <mszeredi@...hat.com>
Subject: [PATCH 4.11 043/150] ovl: fix creds leak in copy up error path

4.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Amir Goldstein <amir73il@...il.com>

commit 8137ae26d25303e7b5cfb418fd28b976461e5b6e upstream.

Fixes: 42f269b92540 ("ovl: rearrange code in ovl_copy_up_locked()")
Signed-off-by: Amir Goldstein <amir73il@...il.com>
Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/overlayfs/copy_up.c |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -269,12 +269,13 @@ static int ovl_copy_up_locked(struct den
 		temp = ovl_do_tmpfile(upperdir, stat->mode);
 	else
 		temp = ovl_lookup_temp(workdir, dentry);
-	err = PTR_ERR(temp);
-	if (IS_ERR(temp))
-		goto out1;
-
 	err = 0;
-	if (!tmpfile)
+	if (IS_ERR(temp)) {
+		err = PTR_ERR(temp);
+		temp = NULL;
+	}
+
+	if (!err && !tmpfile)
 		err = ovl_create_real(wdir, temp, &cattr, NULL, true);
 
 	if (new_creds) {