econet: fix CVE-2010-3850

[firefly-linux-kernel-4.4.55.git] / net / econet / af_econet.c

diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index e366f1bef91f905a46e136bd08bf9414c74bd4fe..d41ba8e56c1053a52eb22fb793a05afd45f7c55f 100644 (file)
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -661,6 +661,9 @@ static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
        err = 0;
        switch (cmd) {
        case SIOCSIFADDR:
+               if (!capable(CAP_NET_ADMIN))
+                       return -EPERM;
+
                edev = dev->ec_ptr;
                if (edev == NULL) {
                        /* Magic up a new one. */