linux-kernel - [PATCH AUTOSEL 5.0 07/98] net: ieee802154: fix a potential NULL pointer dereference

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Date:   Mon, 22 Apr 2019 15:40:34 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Kangjie Lu <kjlu@....edu>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.0 07/98] net: ieee802154: fix a potential NULL pointer dereference

From: Kangjie Lu <kjlu@....edu>

[ Upstream commit 2795e8c251614ac0784c9d41008551109f665716 ]

In case alloc_ordered_workqueue fails, the fix releases
sources and returns -ENOMEM to avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@....edu>
Acked-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Stefan Schmidt <stefan@...enfreihafen.org>
Signed-off-by: Sasha Levin (Microsoft) <sashal@...nel.org>
---
 drivers/net/ieee802154/adf7242.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ieee802154/adf7242.c b/drivers/net/ieee802154/adf7242.c
index cd1d8faccca5..cd6b95e673a5 100644
--- a/drivers/net/ieee802154/adf7242.c
+++ b/drivers/net/ieee802154/adf7242.c
@@ -1268,6 +1268,10 @@ static int adf7242_probe(struct spi_device *spi)
 	INIT_DELAYED_WORK(&lp->work, adf7242_rx_cal_work);
 	lp->wqueue = alloc_ordered_workqueue(dev_name(&spi->dev),
 					     WQ_MEM_RECLAIM);
+	if (unlikely(!lp->wqueue)) {
+		ret = -ENOMEM;
+		goto err_hw_init;
+	}
 
 	ret = adf7242_hw_init(lp);
 	if (ret)
-- 
2.19.1