From: Philipp Reisner <philipp.reisner@linbit.com>
Date: Fri, 2 Oct 2009 02:40:11 +0000 (+0000)
Subject: uvesafb/connector: Disallow unpliviged users to send netlink packets
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cc44578b5a508889beb8ae3ccd4d2bbdf17bc86c;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

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>
---

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;