dm/connector: Only process connector packages from privileged processes

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/md/dm-log-userspace-transfer.c b/drivers/md/dm-log-userspace-transfer.c
index 1327e1a684df..54abf9e303b7 100644
--- a/drivers/md/dm-log-userspace-transfer.c
+++ b/drivers/md/dm-log-userspace-transfer.c
@@ -133,6 +133,9 @@ static void cn_ulog_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
 {
         struct dm_ulog_request *tfr = (struct dm_ulog_request *)(msg + 1);
 
+        if (!cap_raised(nsp->eff_cap, CAP_SYS_ADMIN))
+                return;
+
         spin_lock(&receiving_list_lock);
         if (msg->len == 0)
                 fill_pkg(msg, NULL);