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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Kirill Tkhai <ktkhai@virtuozzo.com>,
        Miklos Szeredi <mszeredi@redhat.com>
Subject: [PATCH 4.4 62/80] fuse: Add missed unlock_page() to fuse_readpages_fill()
Date:   Mon,  3 Sep 2018 18:49:40 +0200
Message-Id: <20180903164936.635410417@linuxfoundation.org>
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4.4-stable review patch.  If anyone has any objections, please let me know.

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

From: Kirill Tkhai <ktkhai@virtuozzo.com>

commit 109728ccc5933151c68d1106e4065478a487a323 upstream.

The above error path returns with page unlocked, so this place seems also
to behave the same.

Fixes: f8dbdf81821b ("fuse: rework fuse_readpages()")
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/fuse/file.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -879,6 +879,7 @@ static int fuse_readpages_fill(void *_da
 	}
 
 	if (WARN_ON(req->num_pages >= req->max_pages)) {
+		unlock_page(page);
 		fuse_put_request(fc, req);
 		return -EIO;
 	}