dst/connector: Disallow unpliviged users to configure dst

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

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/staging/dst/dcore.c b/drivers/staging/dst/dcore.c
index 3943c91e6c96..ee1601026fb0 100644
--- a/drivers/staging/dst/dcore.c
+++ b/drivers/staging/dst/dcore.c
@@ -855,6 +855,11 @@ static void cn_dst_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
         struct dst_node *n = NULL, *tmp;
         unsigned int hash;
 
+        if (!cap_raised(nsp->eff_cap, CAP_SYS_ADMIN)) {
+                err = -EPERM;
+                goto out;
+        }
+
         if (msg->len < sizeof(struct dst_ctl)) {
                 err = -EBADMSG;
                 goto out;