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authorJia-Ju Bai <baijiaju1990@163.com>2017-05-31 15:08:25 +0800
committerDavid S. Miller <davem@davemloft.net>2017-06-01 14:49:47 -0400
commit93818da5eed63fbc17b64080406ea53b86b23309 (patch)
treeffe9549d810ab6446a47219fd4ee7d0a7b1979fe /drivers/isdn/mISDN
parent35cf2845563c1aaa01d27bd34d64795c4ae72700 (diff)
downloadblackbird-op-linux-93818da5eed63fbc17b64080406ea53b86b23309.tar.gz
blackbird-op-linux-93818da5eed63fbc17b64080406ea53b86b23309.zip
mISDN: Fix a sleep-in-atomic bug
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>
Diffstat (limited to 'drivers/isdn/mISDN')
-rw-r--r--drivers/isdn/mISDN/stack.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/isdn/mISDN/stack.c b/drivers/isdn/mISDN/stack.c
index 8b7faea2ddf8..422dced7c90a 100644
--- a/drivers/isdn/mISDN/stack.c
+++ b/drivers/isdn/mISDN/stack.c
@@ -75,7 +75,7 @@ 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;
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