From 67463acb646904d76a8e237cc31eaa87872f30cc Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 10 Jul 2006 04:44:19 -0700 Subject: [PATCH] [PATCH] md: require CAP_SYS_ADMIN for (re-)configuring md devices via sysfs The ioctl requires CAP_SYS_ADMIN, so sysfs should too. Note that we don't require CAP_SYS_ADMIN for reading attributes even though the ioctl does. There is no reason to limit the read access, and much of the information is already available via /proc/mdstat Cc: Chris Wright Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/md.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index c0da5eedc24..a5286beddcf 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1926,6 +1926,8 @@ rdev_attr_store(struct kobject *kobj, struct attribute *attr, if (!entry->store) return -EIO; + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; return entry->store(rdev, page, length); } @@ -2859,6 +2861,8 @@ md_attr_store(struct kobject *kobj, struct attribute *attr, if (!entry->store) return -EIO; + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; rv = mddev_lock(mddev); if (!rv) { rv = entry->store(mddev, page, length); -- 2.46.0