[32/46] dst/connector: Disallow unpliviged users to configure dst

[Greg KH]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Philipp Reisner <philipp.reisner@xxxxxxxxxx>

(cherry picked from commit dbbb3431228784612848a1ec6061c78b4b708b5c)

Signed-off-by: Philipp Reisner <philipp.reisner@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/staging/dst/dcore.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/staging/dst/dcore.c
+++ b/drivers/staging/dst/dcore.c
@@ -854,6 +854,11 @@ static void cn_dst_callback(struct cn_ms
 	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;


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