linux-kernel - [PATCH 3.12 079/119] NFSv4.x: Fix a refcount leak in nfs_callback_up

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Message-Id: <55377ee2f5c04bc79c22cec747daf687540eb35f.1475144721.git.jslaby@suse.cz>
Date:   Thu, 29 Sep 2016 12:25:15 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Trond Myklebust <trond.myklebust@...marydata.com>,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 079/119] NFSv4.x: Fix a refcount leak in nfs_callback_up_net

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

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

===============

commit 98b0f80c2396224bbbed81792b526e6c72ba9efa upstream.

On error, the callers expect us to return without bumping
nn->cb_users[].

Signed-off-by: Trond Myklebust <trond.myklebust@...marydata.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 fs/nfs/callback.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 50443e6dc033..9c98225e45cd 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -302,6 +302,7 @@ static int nfs_callback_up_net(int minorversion, struct svc_serv *serv, struct n
 err_socks:
 	svc_rpcb_cleanup(serv, net);
 err_bind:
+	nn->cb_users[minorversion]--;
 	dprintk("NFS: Couldn't create callback socket: err = %d; "
 			"net = %p\n", ret, net);
 	return ret;
-- 
2.10.0