kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

mISDN: Fix a sleep-in-atomic bug

Browse source 
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>
This commit is contained in:
Jia-Ju Bai 2017-05-31 15:08:25 +08:00 committed by David S. Miller
parent 35cf284556
commit 93818da5ee
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/isdn/mISDN/stack.c
View file

@ -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;