netdev - [PATCH 8/10] Fix leaking of kernel heap addresses in net/

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Message-ID: <1289524039.5167.72.camel@dan>
Date:	Thu, 11 Nov 2010 20:07:19 -0500
From:	Dan Rosenberg <drosenberg@...curity.com>
To:	"David S. Miller" <davem@...emloft.net>,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	Urs Thuermann <urs.thuermann@...kswagen.de>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	James Morris <jmorris@...ei.org>,
	Remi Denis-Courmont <remi.denis-courmont@...ia.com>,
	"Pekka Savola (ipv6)" <pekkas@...core.fi>,
	Sridhar Samudrala <sri@...ibm.com>,
	Vlad Yasevich <vladislav.yasevich@...com>,
	Tejun Heo <tj@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Li Zefan <lizf@...fujitsu.com>, Joe Perches <joe@...ches.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	Jamal Hadi Salim <hadi@...atatu.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Jiri Pirko <jpirko@...hat.com>,
	Johannes Berg <johannes.berg@...el.com>,
	Daniel Lezcano <daniel.lezcano@...e.fr>,
	Pavel Emelyanov <xemul@...nvz.org>,
	socketcan-core@...ts.berlios.de, netdev@...r.kernel.org,
	linux-sctp@...r.kernel.org
Subject: [PATCH 8/10] Fix leaking of kernel heap addresses in net/

diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index 25f746d..2ca2a87 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -631,14 +631,25 @@ static int pn_sock_seq_show(struct seq_file *seq, void *v)
 		struct sock *sk = v;
 		struct pn_sock *pn = pn_sk(sk);
 
-		seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu "
-			"%d %p %d%n",
-			sk->sk_protocol, pn->sobject, 0, pn->resource,
-			sk->sk_state,
-			sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
-			sock_i_uid(sk), sock_i_ino(sk),
-			atomic_read(&sk->sk_refcnt), sk,
-			atomic_read(&sk->sk_drops), &len);
+		/* Only expose kernel addresses to privileged readers */
+		if (capable(CAP_NET_ADMIN))
+			seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X "
+				"%5d %lu %d %p %d%n",
+				sk->sk_protocol, pn->sobject, 0, pn->resource,
+				sk->sk_state,
+				sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
+				sock_i_uid(sk), sock_i_ino(sk),
+				atomic_read(&sk->sk_refcnt), sk,
+				atomic_read(&sk->sk_drops), &len);
+		else
+			seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X "
+				"%5d %lu %d %d %d%n",
+				sk->sk_protocol, pn->sobject, 0, pn->resource,
+				sk->sk_state,
+				sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
+				sock_i_uid(sk), sock_i_ino(sk),
+				atomic_read(&sk->sk_refcnt), 0,
+				atomic_read(&sk->sk_drops), &len);
 	}
 	seq_printf(seq, "%*s\n", 127 - len, "");
 	return 0;



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