This is a note to let you know that I've just added the patch titled
mISDN: Fix a sleep-in-atomic bug
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: misdn-fix-a-sleep-in-atomic-bug.patch and it can be found in the queue-4.4 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 Tue Apr 10 10:31:53 CEST 2018
From: Jia-Ju Bai baijiaju1990@163.com Date: Wed, 31 May 2017 15:08:25 +0800 Subject: mISDN: Fix a sleep-in-atomic bug
From: Jia-Ju Bai baijiaju1990@163.com
[ Upstream commit 93818da5eed63fbc17b64080406ea53b86b23309 ]
The driver may sleep under a read spin lock, and the function call path is: send_socklist (acquire the lock by read_lock) skb_copy(GFP_KERNEL) --> may sleep
To fix it, the "GFP_KERNEL" is replaced with "GFP_ATOMIC".
Signed-off-by: Jia-Ju Bai baijiaju1990@163.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/isdn/mISDN/stack.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/isdn/mISDN/stack.c +++ b/drivers/isdn/mISDN/stack.c @@ -72,7 +72,7 @@ send_socklist(struct mISDN_sock_list *sl if (sk->sk_state != MISDN_BOUND) continue; if (!cskb) - cskb = skb_copy(skb, GFP_KERNEL); + cskb = skb_copy(skb, GFP_ATOMIC); if (!cskb) { printk(KERN_WARNING "%s no skb\n", __func__); break;
Patches currently in stable-queue which might be from baijiaju1990@163.com are
queue-4.4/misdn-fix-a-sleep-in-atomic-bug.patch queue-4.4/qlcnic-fix-a-sleep-in-atomic-bug-in-qlcnic_82xx_hw_write_wx_2m-and-qlcnic_82xx_hw_read_wx_2m.patch