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mac802154: protect address changes via ioctl

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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@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2014-11-09 08:36:59 +01:00 committed by Marcel Holtmann
parent 87023e1058
commit f7cb96f105
1 changed files with 7 additions and 0 deletions
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7
net/mac802154/iface.c
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@ -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 ||