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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, Alexander Aring <aahringo@redhat.com>,
        David Teigland <teigland@redhat.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.12 214/700] fs: dlm: fix lowcomms_start error case
Date:   Mon, 12 Jul 2021 08:04:57 +0200
Message-Id: <20210712060957.123521997@linuxfoundation.org>
In-Reply-To: <20210712060924.797321836@linuxfoundation.org>
References: <20210712060924.797321836@linuxfoundation.org>
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From: Alexander Aring <aahringo@redhat.com>

[ Upstream commit fcef0e6c27ce109d2c617aa12f0bfd9f7ff47d38 ]

This patch fixes the error path handling in lowcomms_start(). We need to
cleanup some static allocated data structure and cleanup possible
workqueue if these have started.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/dlm/lowcomms.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 7e6736c70e11..d2a0ea0acca3 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1600,10 +1600,15 @@ static void process_send_sockets(struct work_struct *work)
 
 static void work_stop(void)
 {
-	if (recv_workqueue)
+	if (recv_workqueue) {
 		destroy_workqueue(recv_workqueue);
-	if (send_workqueue)
+		recv_workqueue = NULL;
+	}
+
+	if (send_workqueue) {
 		destroy_workqueue(send_workqueue);
+		send_workqueue = NULL;
+	}
 }
 
 static int work_start(void)
@@ -1620,6 +1625,7 @@ static int work_start(void)
 	if (!send_workqueue) {
 		log_print("can't start dlm_send");
 		destroy_workqueue(recv_workqueue);
+		recv_workqueue = NULL;
 		return -ENOMEM;
 	}
 
@@ -1751,7 +1757,7 @@ int dlm_lowcomms_start(void)
 
 	error = work_start();
 	if (error)
-		goto fail;
+		goto fail_local;
 
 	dlm_allow_conn = 1;
 
@@ -1768,6 +1774,9 @@ int dlm_lowcomms_start(void)
 fail_unlisten:
 	dlm_allow_conn = 0;
 	dlm_close_sock(&listen_con.sock);
+	work_stop();
+fail_local:
+	deinit_local();
 fail:
 	return error;
 }
-- 
2.30.2