| From | Sasha Levin <> | Subject | [PATCH AUTOSEL for 4.9 185/281] mISDN: Fix a sleep-in-atomic bug | Date | Mon, 19 Mar 2018 16:01:32 +0000 |
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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> --- drivers/isdn/mISDN/stack.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/isdn/mISDN/stack.c b/drivers/isdn/mISDN/stack.c index 9cb4b621fbc3..b92a19a594a1 100644 --- a/drivers/isdn/mISDN/stack.c +++ b/drivers/isdn/mISDN/stack.c @@ -72,7 +72,7 @@ send_socklist(struct mISDN_sock_list *sl, struct sk_buff *skb) 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; -- 2.14.1
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