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Message-ID: <4744113B.5010309@openvz.org>
Date: Wed, 21 Nov 2007 14:06:35 +0300
From: Pavel Emelyanov <xemul@...nvz.org>
To: Andrew Morton <akpm@...l.org>
CC: Cedric Le Goater <clg@...ibm.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Containers <containers@...ts.osdl.org>
Subject: [PATCH] Isolate the UTS namespace's domainname and hostname back
The commit
commit 7d69a1f4a72b18876c99c697692b78339d491568
Author: Cedric Le Goater <clg@...ibm.com>
Date: Sun Jul 15 23:40:58 2007 -0700
remove CONFIG_UTS_NS and CONFIG_IPC_NS
accidentally removed the code, that prevented the uts->hostname
and uts->domainname values from being overwritten from another
namespace. In other words, setting hostname/domainname via sysfs
(echo xxx > /proc/sys/kernel/(host|domain)name) cased the new
value to be set in init UTS namespace only.
Return the isolation back.
Signed-off-by: Pavel Emelyanov <xemul@...nvz.org>
---
diff --git a/kernel/utsname_sysctl.c b/kernel/utsname_sysctl.c
index c76c064..fe3a56c 100644
--- a/kernel/utsname_sysctl.c
+++ b/kernel/utsname_sysctl.c
@@ -18,6 +18,10 @@
static void *get_uts(ctl_table *table, int write)
{
char *which = table->data;
+ struct uts_namespace *uts_ns;
+
+ uts_ns = current->nsproxy->uts_ns;
+ which = (which - (char *)&init_uts_ns) + (char *)uts_ns;
if (!write)
down_read(&uts_sem);
-
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