uvesafb/connector: Disallow unpliviged users to send netlink packets

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/video/uvesafb.c b/drivers/video/uvesafb.c
index aa7cd959cced..e35232a18571 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -72,6 +72,9 @@ static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *ns
         struct uvesafb_task *utask;
         struct uvesafb_ktask *task;
 
+        if (!cap_raised(nsp->eff_cap, CAP_SYS_ADMIN))
+                return;
+
         if (msg->seq >= UVESAFB_TASKS_MAX)
                 return;