Commit 1ec22eb2 authored Jul 01, 2009 by NeilBrown

md: fix error path when duplicate name is found on md device creation.



When an md device is created by name (rather than number) we need to
check that the name is not already in use.  If this check finds a
duplicate, we return an error without dropping the lock or freeing
the newly create mddev.
This patch fixes that.

Cc: stable@kernel.org
Found-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

parent b8d966ef

drivers/md/md.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -3862,6 +3862,8 @@ static int md_alloc(dev_t dev, char *name)
		if (mddev2->gendisk &&
		strcmp(mddev2->gendisk->disk_name, name) == 0) {
		spin_unlock(&all_mddevs_lock);
		mutex_unlock(&disks_mutex);
		mddev_put(mddev);
		return -EEXIST;
		}
		spin_unlock(&all_mddevs_lock);