netdev - [PATCH 5/10] Fix leaking of kernel heap addresses in net/

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Date:	Thu, 11 Nov 2010 20:07:09 -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 5/10] Fix leaking of kernel heap addresses in net/

diff --git a/net/key/af_key.c b/net/key/af_key.c
index d87c22d..977481a 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -3643,14 +3643,25 @@ static int pfkey_seq_show(struct seq_file *f, void *v)
 	if (v == SEQ_START_TOKEN)
 		seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
 	else
-		seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
-			       s,
-			       atomic_read(&s->sk_refcnt),
-			       sk_rmem_alloc_get(s),
-			       sk_wmem_alloc_get(s),
-			       sock_i_uid(s),
-			       sock_i_ino(s)
-			       );
+		/* Only expose kernel addresses to privileged readers */
+		if (capable(CAP_NET_ADMIN))
+			seq_printf(f, "%p %-6d %-6u %-6u %-6u %-6lu\n",
+				s,
+				atomic_read(&s->sk_refcnt),
+				sk_rmem_alloc_get(s),
+				sk_wmem_alloc_get(s),
+				sock_i_uid(s),
+				sock_i_ino(s)
+				);
+		else
+			seq_printf(f, "%d %-6d %-6u %-6u %-6u %-6lu\n",
+				0,
+				atomic_read(&s->sk_refcnt),
+				sk_rmem_alloc_get(s),
+				sk_wmem_alloc_get(s),
+				sock_i_uid(s),
+				sock_i_ino(s)
+				);
 	return 0;
 }
 



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