Patch "libertas: check return value of alloc_workqueue" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

libertas: check return value of alloc_workqueue

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
libertas-check-return-value-of-alloc_workqueue.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Pan Bian <[email protected]>
Date: Sun, 23 Apr 2017 21:19:38 +0800
Subject: libertas: check return value of alloc_workqueue

From: Pan Bian <[email protected]>

[ Upstream commit dc3f89c38a8406554ffeffa370aad086a9c5e9de ]

Function alloc_workqueue() will return a NULL pointer if there is no enough memory, and its return value should be validated before using. However, in function if_spi_probe(), its return value is not checked. This may result in a NULL dereference bug. This patch fixes the bug.

---
 drivers/net/wireless/marvell/libertas/if_spi.c |    5 +++++
 1 file changed, 5 insertions(+)

@@ -1181,6 +1181,10 @@ static int if_spi_probe(struct spi_devic
 
 	/* Initialize interrupt handling stuff. */
 	card->workqueue = alloc_workqueue("libertas_spi", WQ_MEM_RECLAIM, 0);
+	if (!card->workqueue) {
+		err = -ENOMEM;
+		goto remove_card;
+	}
 	INIT_WORK(&card->packet_work, if_spi_host_to_card_worker);
 	INIT_WORK(&card->resume_work, if_spi_resume_worker);
 

@@ -1209,6 +1213,7 @@ release_irq:
 	free_irq(spi->irq, card);
 terminate_workqueue:
 	destroy_workqueue(card->workqueue);
+remove_card:
 	lbs_remove_card(priv); /* will call free_netdev */
 free_card:
 	free_if_spi_card(card);

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/tipc-check-return-value-of-nlmsg_new.patch queue-4.9/mt7601u-check-return-value-of-alloc_skb.patch queue-4.9/rndis_wlan-add-return-value-validation.patch queue-4.9/libertas-check-return-value-of-alloc_workqueue.patch queue-4.9/staging-wilc1000-fix-unchecked-return-value.patch queue-4.9/qlcnic-fix-unchecked-return-value.patch queue-4.9/wan-pc300too-abort-path-on-failure.patch queue-4.9/power-supply-isp1704-fix-unchecked-return-value-of-devm_kzalloc.patch