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

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Message-ID: <1289524045.5167.74.camel@dan>
Date:	Thu, 11 Nov 2010 20:07:25 -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 10/10] Fix leaking of kernel heap addresses in net/

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 3c95304..ba7cf7c 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2198,16 +2198,33 @@ static int unix_seq_show(struct seq_file *seq, void *v)
 		struct unix_sock *u = unix_sk(s);
 		unix_state_lock(s);
 
-		seq_printf(seq, "%p: %08X %08X %08X %04X %02X %5lu",
-			s,
-			atomic_read(&s->sk_refcnt),
-			0,
-			s->sk_state == TCP_LISTEN ? __SO_ACCEPTCON : 0,
-			s->sk_type,
-			s->sk_socket ?
-			(s->sk_state == TCP_ESTABLISHED ? SS_CONNECTED : SS_UNCONNECTED) :
-			(s->sk_state == TCP_ESTABLISHED ? SS_CONNECTING : SS_DISCONNECTING),
-			sock_i_ino(s));
+		/* Only expose kernel addresses to privileged readers */
+		if (capable(CAP_NET_ADMIN))
+			seq_printf(seq, "%p: %08X %08X %08X %04X %02X %5lu",
+				s,
+				atomic_read(&s->sk_refcnt),
+				0,
+				s->sk_state == TCP_LISTEN ? __SO_ACCEPTCON : 0,
+				s->sk_type,
+				s->sk_socket ?
+				(s->sk_state == TCP_ESTABLISHED ?
+				SS_CONNECTED : SS_UNCONNECTED) :
+				(s->sk_state == TCP_ESTABLISHED ?
+				SS_CONNECTING : SS_DISCONNECTING),
+				sock_i_ino(s));
+		else
+			seq_printf(seq, "%d: %08X %08X %08X %04X %02X %5lu",
+				0,
+				atomic_read(&s->sk_refcnt),
+				0,
+				s->sk_state == TCP_LISTEN ? __SO_ACCEPTCON : 0,
+				s->sk_type,
+				s->sk_socket ?
+				(s->sk_state == TCP_ESTABLISHED ?
+				SS_CONNECTED : SS_UNCONNECTED) :
+				(s->sk_state == TCP_ESTABLISHED ?
+				SS_CONNECTING : SS_DISCONNECTING),
+				sock_i_ino(s));
 
 		if (u->addr) {
 			int i, len;



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