From: Patrick McHardy <kaber@trash.net>
To: "David S. Miller" <davem@davemloft.net>
Cc: Netfilter Development Mailinglist
<netfilter-devel@vger.kernel.org>,
Linux Netdev List <netdev@vger.kernel.org>
Subject: netfilter: ctnetlink: fix scheduling while atomic
Date: Wed, 21 Jan 2009 12:01:50 +0100 [thread overview]
Message-ID: <4977009E.3020806@trash.net> (raw)
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commit 334055b92c6bf132d7d9ba52fadfdebd71ba586b
Author: Patrick McHardy <kaber@trash.net>
Date: Wed Jan 21 11:59:14 2009 +0100
netfilter: ctnetlink: fix scheduling while atomic
Caused by call to request_module() while holding nf_conntrack_lock.
Reported-and-tested-by: Kövesdi György <kgy@teledigit.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 3dddec6..c32a7e8 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -831,13 +831,16 @@ ctnetlink_parse_nat_setup(struct nf_conn *ct,
if (!parse_nat_setup) {
#ifdef CONFIG_MODULES
rcu_read_unlock();
+ spin_unlock_bh(&nf_conntrack_lock);
nfnl_unlock();
if (request_module("nf-nat-ipv4") < 0) {
nfnl_lock();
+ spin_lock_bh(&nf_conntrack_lock);
rcu_read_lock();
return -EOPNOTSUPP;
}
nfnl_lock();
+ spin_lock_bh(&nf_conntrack_lock);
rcu_read_lock();
if (nfnetlink_parse_nat_setup_hook)
return -EAGAIN;
next reply other threads:[~2009-01-21 11:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-21 11:01 Patrick McHardy [this message]
2009-01-21 20:20 ` netfilter: ctnetlink: fix scheduling while atomic David Miller
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