dst/connector: Disallow unpliviged users to configure dst

(cherry picked from commit dbbb3431228784612848a1ec6061c78b4b708b5c)

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/dst/dcore.c b/drivers/staging/dst/dcore.c
index 32f102d5c21b3ae11025e1b8b52ccbf4869a6aee..5546898dbdb4328bce6195414acafed5ca8f7bff 100644 (file)
--- a/drivers/staging/dst/dcore.c
+++ b/drivers/staging/dst/dcore.c
@@ -854,6 +854,11 @@ 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;