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Commit ca388059 authored by NeilBrown's avatar NeilBrown Committed by Linus Torvalds
Browse files

md: lock address when changing attributes of component devices 



Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent c5d79adb

drivers/md/md.c

+7 −1
Original line number Diff line number Diff line
@@ -2075,12 +2075,18 @@ rdev_attr_store(struct kobject *kobj, struct attribute *attr, 
{

	struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr);

	mdk_rdev_t *rdev = container_of(kobj, mdk_rdev_t, kobj);

	int rv;



	if (!entry->store)

		return -EIO;

	if (!capable(CAP_SYS_ADMIN))

		return -EACCES;

	return entry->store(rdev, page, length);

	rv = mddev_lock(rdev->mddev);

	if (!rv) {

		rv = entry->store(rdev, page, length);

		mddev_unlock(rdev->mddev);

	}

	return rv;

}



static void rdev_free(struct kobject *ko)