This patch adds a netif_running check while trying to change the address
attributes via ioctl. While netif_running is true these attributes
should be only readable.
Signed-off-by: Alexander Aring <alex.aring@xxxxxxxxx>
---
net/mac802154/iface.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c
index d635f36..83715b5 100644
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -63,6 +63,8 @@ mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
int err = -ENOIOCTLCMD;
+ ASSERT_RTNL();
+
spin_lock_bh(&sdata->mib_lock);
switch (cmd) {
@@ -87,6 +89,11 @@ mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
break;
}
case SIOCSIFADDR:
+ if (netif_running(dev)) {
+ spin_unlock_bh(&sdata->mib_lock);
+ return -EBUSY;
+ }
+
dev_warn(&dev->dev,
"Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
if (sa->family != AF_IEEE802154 ||
--
2.1.3
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