linux-kernel - [PATCH 4.6 053/203] NFS: Fix a double page unlock

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Date:	Mon, 25 Jul 2016 13:54:28 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	Anna Schumaker <Anna.Schumaker@...app.com>
Subject: [PATCH 4.6 053/203] NFS: Fix a double page unlock

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

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

From: Trond Myklebust <trond.myklebust@...marydata.com>

commit cbebaf897e5c4862567eb799dc84acc5d7ee2678 upstream.

Since commit 0bcbf039f6b2, nfs_readpage_release() has been used to
unlock the page in the read code.

Fixes: 0bcbf039f6b2 ("nfs: handle request add failure properly")
Signed-off-by: Trond Myklebust <trond.myklebust@...marydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@...app.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/nfs/read.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -367,13 +367,13 @@ readpage_async_filler(void *data, struct
 		nfs_list_remove_request(new);
 		nfs_readpage_release(new);
 		error = desc->pgio->pg_error;
-		goto out_unlock;
+		goto out;
 	}
 	return 0;
 out_error:
 	error = PTR_ERR(new);
-out_unlock:
 	unlock_page(page);
+out:
 	return error;
 }