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 <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Allen Pais <allen.pais@oracle.com>,
        Kalle Valo <kvalo@codeaurora.org>,
        Sasha Levin <sashal@kernel.org>,
        libertas-dev@lists.infradead.org, linux-wireless@vger.kernel.org,
        netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.3 021/292] libertas: fix a potential NULL pointer dereference
Date:   Tue, 10 Dec 2019 16:20:40 -0500
Message-Id: <20191210212511.11392-21-sashal@kernel.org>
In-Reply-To: <20191210212511.11392-1-sashal@kernel.org>
References: <20191210212511.11392-1-sashal@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Allen Pais <allen.pais@oracle.com>

[ Upstream commit 7da413a18583baaf35dd4a8eb414fa410367d7f2 ]

alloc_workqueue is not checked for errors and as a result,
a potential NULL dereference could occur.

Signed-off-by: Allen Pais <allen.pais@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/marvell/libertas/if_sdio.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/wireless/marvell/libertas/if_sdio.c b/drivers/net/wireless/marvell/libertas/if_sdio.c
index 242d8845da3fa..30f1025ecb9bc 100644
--- a/drivers/net/wireless/marvell/libertas/if_sdio.c
+++ b/drivers/net/wireless/marvell/libertas/if_sdio.c
@@ -1179,6 +1179,10 @@ static int if_sdio_probe(struct sdio_func *func,
 
 	spin_lock_init(&card->lock);
 	card->workqueue = alloc_workqueue("libertas_sdio", WQ_MEM_RECLAIM, 0);
+	if (unlikely(!card->workqueue)) {
+		ret = -ENOMEM;
+		goto err_queue;
+	}
 	INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
 	init_waitqueue_head(&card->pwron_waitq);
 
@@ -1230,6 +1234,7 @@ static int if_sdio_probe(struct sdio_func *func,
 	lbs_remove_card(priv);
 free:
 	destroy_workqueue(card->workqueue);
+err_queue:
 	while (card->packets) {
 		packet = card->packets;
 		card->packets = card->packets->next;
-- 
2.20.1