netdev - [PATCH] ax25: Fix possible oops in ax25_make

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Message-ID: <20090927205701.GA7205@del.dom.local>
Date:	Sun, 27 Sep 2009 22:57:02 +0200
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Ralf Baechle DL5RB <ralf@...ux-mips.org>
Cc:	David Miller <davem@...emloft.net>,
	Bernard Pidoux F6BVP <f6bvp@...e.fr>,
	Bernard Pidoux <bernard.pidoux@...c.fr>,
	Linux Netdev List <netdev@...r.kernel.org>,
	linux-hams <linux-hams@...r.kernel.org>
Subject: [PATCH] ax25: Fix possible oops in ax25_make_new

In ax25_make_new, if kmemdup of digipeat returns an error, there would
be an oops in sk_free while calling sk_destruct, because sk_protinfo
is NULL at the moment; move sk->sk_destruct initialization after this.

BTW of reported-by: Bernard Pidoux F6BVP <f6bvp@...e.fr>

Signed-off-by: Jarek Poplawski <jarkao2@...il.com>
---

 net/ax25/af_ax25.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index fbcac76..9884639 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -900,7 +900,6 @@ struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
 
 	sock_init_data(NULL, sk);
 
-	sk->sk_destruct = ax25_free_sock;
 	sk->sk_type     = osk->sk_type;
 	sk->sk_priority = osk->sk_priority;
 	sk->sk_protocol = osk->sk_protocol;
@@ -938,6 +937,7 @@ struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
 	}
 
 	sk->sk_protinfo = ax25;
+	sk->sk_destruct = ax25_free_sock;
 	ax25->sk    = sk;
 
 	return sk;
--
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