From: <gregkh@linuxfoundation.org>
To: baijiaju1990@163.com, alexander.levin@microsoft.com,
gregkh@linuxfoundation.org, johannes.berg@intel.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "mac80211_hwsim: Fix a possible sleep-in-atomic bug in hwsim_get_radio_nl" has been added to the 4.9-stable tree
Date: Wed, 28 Feb 2018 16:14:46 +0100 [thread overview]
Message-ID: <15198308864283@kroah.com> (raw)
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 <stable@vger.kernel.org> know about it.
>From foo@baz Wed Feb 28 16:13:29 CET 2018
From: Jia-Ju Bai <baijiaju1990@163.com>
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 <baijiaju1990@163.com>
[ 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.
Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/wireless/mac80211_hwsim.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -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 baijiaju1990@163.com are
queue-4.9/mac80211_hwsim-fix-a-possible-sleep-in-atomic-bug-in-hwsim_get_radio_nl.patch
reply other threads:[~2018-02-28 15:15 UTC|newest]
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