[PATCH 2/10] Fix leaking of kernel heap addresses in net/

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



diff --git a/net/can/bcm.c b/net/can/bcm.c
index 08ffe9e..5960ad7 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -165,9 +165,16 @@ static int bcm_proc_show(struct seq_file *m, void *v)
 	struct bcm_sock *bo = bcm_sk(sk);
 	struct bcm_op *op;
 
-	seq_printf(m, ">>> socket %p", sk->sk_socket);
-	seq_printf(m, " / sk %p", sk);
-	seq_printf(m, " / bo %p", bo);
+	/* Only expose kernel addresses to privileged readers */
+	if (capable(CAP_NET_ADMIN))
+		seq_printf(m, ">>> socket %p", sk->sk_socket);
+		seq_printf(m, " / sk %p", sk);
+		seq_printf(m, " / bo %p", bo);
+	else
+		seq_printf(m, ">>> socket %lu", sock_i_ino(sk));
+		seq_printf(m, " / sk %d", 0);
+		seq_printf(m, " / bo %d", 0);
+
 	seq_printf(m, " / dropped %lu", bo->dropped_usr_msgs);
 	seq_printf(m, " / bound %s", bcm_proc_getifname(ifname, bo->ifindex));
 	seq_printf(m, " <<<\n");
@@ -1520,8 +1527,8 @@ static int bcm_connect(struct socket *sock, struct sockaddr *uaddr, int len,
 	bo->bound = 1;
 
 	if (proc_dir) {
-		/* unique socket address as filename */
-		sprintf(bo->procname, "%p", sock);
+		/* unique socket inode as filename */
+		sprintf(bo->procname, "%lx", sock_i_ino(sk));
 		bo->bcm_proc_read = proc_create_data(bo->procname, 0644,
 						     proc_dir,
 						     &bcm_proc_fops, sk);



--
To unsubscribe from this list: send the line "unsubscribe linux-sctp" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Networking Development]     [Linux OMAP]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux