netdev - re: bonding: sync netpoll code with bridge

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1343286905.12207.7.camel@cr0>
Date:	Thu, 26 Jul 2012 15:15:05 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	netdev@...r.kernel.org
Subject: re: bonding: sync netpoll code with bridge

On Wed, 2012-07-25 at 16:47 +0300, Dan Carpenter wrote:
> Hello Amerigo Wang,
> 
> The patch 8a8efa22f51b: "bonding: sync netpoll code with bridge" from 
> Feb 17, 2011, leads to the following warning:
> drivers/net/bonding/bond_main.c:1849 bond_enslave()
> 	 error: scheduling with locks held: 'read_lock:&bond->lock'

Yeah, makes sense. Just wondering why I didn't catch it when I tested
that patch. Anyway, could you try the following patch?

----------->

diff --git a/drivers/net/bonding/bond_main.c
b/drivers/net/bonding/bond_main.c
index 6fae5f3..ab773d4 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1235,7 +1235,7 @@ static inline int slave_enable_netpoll(struct
slave *slave)
 	struct netpoll *np;
 	int err = 0;
 
-	np = kzalloc(sizeof(*np), GFP_KERNEL);
+	np = kzalloc(sizeof(*np), GFP_ATOMIC);
 	err = -ENOMEM;
 	if (!np)
 		goto out;
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index b4c90e4..c78a966 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -734,7 +734,7 @@ int __netpoll_setup(struct netpoll *np, struct
net_device *ndev)
 	}
 
 	if (!ndev->npinfo) {
-		npinfo = kmalloc(sizeof(*npinfo), GFP_KERNEL);
+		npinfo = kmalloc(sizeof(*npinfo), GFP_ATOMIC);
 		if (!npinfo) {
 			err = -ENOMEM;
 			goto out;


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html