From 730d7d339884f20da28b59bf6f0a16af6400a113 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Mon, 23 Sep 2013 14:41:17 -0700 Subject: [PATCH] sysfs: Allow mounting without CONFIG_NET In kobj_ns_current_may_mount the default should be to allow the mount. The test is only for a single kobj_ns_type at a time, and unless there is a reason to prevent it the mounting sysfs should be allowed. Subsystems that are not registered can't have are not involved so can't have a reason to prevent mounting sysfs. This is a bug-fix to commit 7dc5dbc879bd ("sysfs: Restrict mounting sysfs") that came in via the userns tree during the 3.12 merge window. Reported-and-tested-by: James Hogan Signed-off-by: "Eric W. Biederman" Signed-off-by: Linus Torvalds --- lib/kobject.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/lib/kobject.c b/lib/kobject.c index 9621751..669bf19 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -933,10 +933,7 @@ const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj) bool kobj_ns_current_may_mount(enum kobj_ns_type type) { - bool may_mount = false; - - if (type == KOBJ_NS_TYPE_NONE) - return true; + bool may_mount = true; spin_lock(&kobj_ns_type_lock); if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && -- 2.7.4