From 34358c26a2c96b2a068dc44e0ac602106a466bce Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 24 Oct 2007 16:52:31 -0700 Subject: kobject: check for duplicate names in kobject_rename This should catch any duplicate names before we try to tell sysfs to rename the object. This happens a lot with older versions of udev and the network rename scripts. Cc: David Miller Cc: Kay Sievers Cc: Rafael J. Wysocki Cc: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- lib/kobject.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'lib/kobject.c') diff --git a/lib/kobject.c b/lib/kobject.c index 03d40360ff1..a7e3bf4d3c7 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -308,6 +308,19 @@ int kobject_rename(struct kobject * kobj, const char *new_name) if (!kobj->parent) return -EINVAL; + /* see if this name is already in use */ + if (kobj->kset) { + struct kobject *temp_kobj; + temp_kobj = kset_find_obj(kobj->kset, new_name); + if (temp_kobj) { + printk(KERN_WARNING "kobject '%s' can not be renamed " + "to '%s' as '%s' is already in existance.\n", + kobject_name(kobj), new_name, new_name); + kobject_put(temp_kobj); + return -EINVAL; + } + } + devpath = kobject_get_path(kobj, GFP_KERNEL); if (!devpath) { error = -ENOMEM; -- cgit v1.2.3