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| author | Jia-Ju Bai <baijiaju1990@163.com> | 2017-05-31 15:08:25 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-13 19:48:17 +0200 |
| commit | 96770d43016bbb1f0491c2611f0a5e07092101f2 (patch) | |
| tree | 907473ef58c935c8f2d8f708ae362030cefc9a6d | |
| parent | 50f48039a7bd246aeafdb6733d406ab7c1a6a96a (diff) | |
| download | linux-stable-96770d43016bbb1f0491c2611f0a5e07092101f2.tar.gz linux-stable-96770d43016bbb1f0491c2611f0a5e07092101f2.tar.bz2 linux-stable-96770d43016bbb1f0491c2611f0a5e07092101f2.zip | |
mISDN: Fix a sleep-in-atomic bug
[ 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>
| -rw-r--r-- | drivers/isdn/mISDN/stack.c | 2 |
1 files changed, 1 insertions, 1 deletions
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; |