net: ieee802154: fix a potential NULL pointer dereference

[ 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@umn.edu>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>

diff --git a/drivers/net/ieee802154/adf7242.c b/drivers/net/ieee802154/adf7242.c
index cd1d8fa..cd6b95e 100644 (file)
--- 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)