linux-kernel - [PATCH 4/4] UML - Use get_random_bytes after random pool is seeded

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Message-Id: <200612042312.kB4NCNiN024571@ccure.user-mode-linux.org>
Date:	Mon, 04 Dec 2006 18:12:23 -0500
From:	Jeff Dike <jdike@...toit.com>
To:	akpm@...l.org
cc:	linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: [PATCH 4/4] UML - Use get_random_bytes after random pool is seeded

When the UML network driver generates random MACs for its devices, it was
possible for a number of UMLs to get the same MACs because the ethernet 
initialization was done before the random pool was properly seeded.

This patch moves the initialization later so that it gets better randomness.

Signed-off-by: Jeff Dike <jdike@...toit.com>

Index: linux-2.6.18-mm/arch/um/drivers/daemon_kern.c
===================================================================
--- linux-2.6.18-mm.orig/arch/um/drivers/daemon_kern.c	2006-11-24 14:29:57.000000000 -0500
+++ linux-2.6.18-mm/arch/um/drivers/daemon_kern.c	2006-12-04 12:08:52.000000000 -0500
@@ -98,4 +98,4 @@ static int register_daemon(void)
 	return 0;
 }
 
-__initcall(register_daemon);
+late_initcall(register_daemon);
Index: linux-2.6.18-mm/arch/um/drivers/mcast_kern.c
===================================================================
--- linux-2.6.18-mm.orig/arch/um/drivers/mcast_kern.c	2006-11-24 14:29:57.000000000 -0500
+++ linux-2.6.18-mm/arch/um/drivers/mcast_kern.c	2006-12-04 12:08:52.000000000 -0500
@@ -127,4 +127,4 @@ static int register_mcast(void)
 	return 0;
 }
 
-__initcall(register_mcast);
+late_initcall(register_mcast);
Index: linux-2.6.18-mm/arch/um/drivers/pcap_kern.c
===================================================================
--- linux-2.6.18-mm.orig/arch/um/drivers/pcap_kern.c	2006-11-24 14:29:57.000000000 -0500
+++ linux-2.6.18-mm/arch/um/drivers/pcap_kern.c	2006-12-04 12:08:52.000000000 -0500
@@ -109,4 +109,4 @@ static int register_pcap(void)
 	return 0;
 }
 
-__initcall(register_pcap);
+late_initcall(register_pcap);
Index: linux-2.6.18-mm/arch/um/drivers/slip_kern.c
===================================================================
--- linux-2.6.18-mm.orig/arch/um/drivers/slip_kern.c	2006-11-27 18:55:16.000000000 -0500
+++ linux-2.6.18-mm/arch/um/drivers/slip_kern.c	2006-12-04 12:08:52.000000000 -0500
@@ -95,4 +95,4 @@ static int register_slip(void)
 	return 0;
 }
 
-__initcall(register_slip);
+late_initcall(register_slip);
Index: linux-2.6.18-mm/arch/um/drivers/slirp_kern.c
===================================================================
--- linux-2.6.18-mm.orig/arch/um/drivers/slirp_kern.c	2006-11-27 18:55:16.000000000 -0500
+++ linux-2.6.18-mm/arch/um/drivers/slirp_kern.c	2006-12-04 12:08:52.000000000 -0500
@@ -119,4 +119,4 @@ static int register_slirp(void)
 	return 0;
 }
 
-__initcall(register_slirp);
+late_initcall(register_slirp);
Index: linux-2.6.18-mm/arch/um/os-Linux/drivers/ethertap_kern.c
===================================================================
--- linux-2.6.18-mm.orig/arch/um/os-Linux/drivers/ethertap_kern.c	2006-11-27 18:55:16.000000000 -0500
+++ linux-2.6.18-mm/arch/um/os-Linux/drivers/ethertap_kern.c	2006-12-04 12:08:52.000000000 -0500
@@ -105,4 +105,4 @@ static int register_ethertap(void)
 	return 0;
 }
 
-__initcall(register_ethertap);
+late_initcall(register_ethertap);
Index: linux-2.6.18-mm/arch/um/os-Linux/drivers/tuntap_kern.c
===================================================================
--- linux-2.6.18-mm.orig/arch/um/os-Linux/drivers/tuntap_kern.c	2006-11-27 18:55:16.000000000 -0500
+++ linux-2.6.18-mm/arch/um/os-Linux/drivers/tuntap_kern.c	2006-12-04 12:08:52.000000000 -0500
@@ -90,4 +90,4 @@ static int register_tuntap(void)
 	return 0;
 }
 
-__initcall(register_tuntap);
+late_initcall(register_tuntap);

-
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