[PATCH] utsns: fix !CONFIG_UTS_NS behavior
When CONFIG_UTS_NS=n, clone(CLONE_NEWUTS) quietly refuses. So correctly does
not unshare a new uts namespace, but also does not return -EINVAL.
Fix this to return -EINVAL so the caller knows his request was denied.
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/utsname.h b/include/linux/utsname.h
index a4555fe..e10267d 100644
--- a/include/linux/utsname.h
+++ b/include/linux/utsname.h
@@ -70,6 +70,8 @@
static inline int copy_utsname(int flags, struct task_struct *tsk)
{
+ if (flags & CLONE_NEWUTS)
+ return -EINVAL;
return 0;
}
static inline void put_uts_ns(struct uts_namespace *ns)