linux-kernel - [PATCH 1/1] NET: netpoll, fix potential NULL ptr dereference

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Message-Id: <1268753394-17765-1-git-send-email-jslaby@suse.cz>
Date:	Tue, 16 Mar 2010 16:29:54 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	jirislaby@...il.com, Daniel Borkmann <danborkmann@...glemail.com>
Subject: [PATCH 1/1] NET: netpoll, fix potential NULL ptr dereference

Stanse found that one error path in netpoll_setup dereferences npinfo
even though it is NULL. Avoid that by adding new label and go to that
instead.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Daniel Borkmann <danborkmann@...glemail.com>
Cc: David S. Miller <davem@...emloft.net>
---
 net/core/netpoll.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 7aa6972..d4ec38f 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -735,7 +735,7 @@ int netpoll_setup(struct netpoll *np)
 		npinfo = kmalloc(sizeof(*npinfo), GFP_KERNEL);
 		if (!npinfo) {
 			err = -ENOMEM;
-			goto release;
+			goto put;
 		}
 
 		npinfo->rx_flags = 0;
@@ -845,7 +845,7 @@ int netpoll_setup(struct netpoll *np)
 
 		kfree(npinfo);
 	}
-
+put:
 	dev_put(ndev);
 	return err;
 }
-- 
1.7.0.1


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