Patch "mac80211_hwsim: Fix a possible sleep-in-atomic bug in hwsim_get_radio_nl" 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

mac80211_hwsim: Fix a possible sleep-in-atomic bug in hwsim_get_radio_nl

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:
mac80211_hwsim-fix-a-possible-sleep-in-atomic-bug-in-hwsim_get_radio_nl.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: Jia-Ju Bai <[email protected]>
Date: Tue, 12 Dec 2017 17:26:36 +0800
Subject: mac80211_hwsim: Fix a possible sleep-in-atomic bug in hwsim_get_radio_nl

From: Jia-Ju Bai <[email protected]>

[ Upstream commit 162bd5e5fd921785077b5862d8f2ffabe2fe11e5 ]

The driver may sleep under a spinlock.
The function call path is:
hwsim_get_radio_nl (acquire the spinlock)
nlmsg_new(GFP_KERNEL) --> may sleep

To fix it, GFP_KERNEL is replaced with GFP_ATOMIC.

This bug is found by my static analysis tool(DSAC) and checked by my code review.

---
 drivers/net/wireless/mac80211_hwsim.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -3154,7 +3154,7 @@ static int hwsim_get_radio_nl(struct sk_
 		if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
 			continue;
 
-		skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+		skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 		if (!skb) {
 			res = -ENOMEM;
 			goto out_err;

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

queue-4.9/mac80211_hwsim-fix-a-possible-sleep-in-atomic-bug-in-hwsim_get_radio_nl.patch