Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>
CC:     David Howells <dhowells@redhat.com>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.14 068/110] afs: Fix missing error handling in
 afs_write_end()
Thread-Topic: [PATCH AUTOSEL for 4.14 068/110] afs: Fix missing error handling
 in afs_write_end()
Thread-Index: AQHTnRjzRINjaCinU02VytHpalYPcw==
Date:   Sat, 3 Feb 2018 18:01:01 +0000
Message-ID: <20180203180015.29073-68-alexander.levin@microsoft.com>
References: <20180203180015.29073-1-alexander.levin@microsoft.com>
In-Reply-To: <20180203180015.29073-1-alexander.levin@microsoft.com>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: microsoft.com does not designate
 permitted sender hosts)
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: b53e8200-aa19-4dbd-5b6d-08d56b303c75
X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Feb 2018 18:01:01.1284
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR2101MB1105
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

From: David Howells <dhowells@redhat.com>

[ Upstream commit afae457d874860a7e299d334f59eede5f3ad4b47 ]

afs_write_end() is missing page unlock and put if afs_fill_page() fails.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 fs/afs/write.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/fs/afs/write.c b/fs/afs/write.c
index 106e43db1115..926d4d68f791 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -282,7 +282,7 @@ int afs_write_end(struct file *file, struct address_spa=
ce *mapping,
 			ret =3D afs_fill_page(vnode, key, pos + copied,
 					    len - copied, page);
 			if (ret < 0)
-				return ret;
+				goto out;
 		}
 		SetPageUptodate(page);
 	}
@@ -290,10 +290,12 @@ int afs_write_end(struct file *file, struct address_s=
pace *mapping,
 	set_page_dirty(page);
 	if (PageDirty(page))
 		_debug("dirtied");
+	ret =3D copied;
+
+out:
 	unlock_page(page);
 	put_page(page);
-
-	return copied;
+	return ret;
 }
=20
 /*
--=20
2.11.0