The commit
commit 7d69a1f4a72b18876c99c697692b78339d491568
Author: Cedric Le Goater <[email protected]>
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 <[email protected]>
---
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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