mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-04 01:49:36 +00:00
Code Issues Releases Wiki Activity

davinci_emac: fix kernel oops when changing MAC address while interface is down

Browse source 
Check that network interface is running before changing its MAC address.
Otherwise, rxch is accessed when it's NULL - causing a kernel oops.
Moreover, check that the new MAC address is valid.

Signed-off-by: Pablo Bitton <pablo.bitton@gmail.com>
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Tested-by: Chaithrika U S <chaithrika@ti.com>
[tested on DM6467 EVM]
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Bitton 2009-07-07 19:11:10 -07:00 committed by David S. Miller
parent 19e588e7d1
commit 64c8165b44
1 changed files with 10 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
drivers/net/davinci_emac.c
View file

@ -1820,11 +1820,19 @@ static int emac_dev_setmac_addr(struct net_device *ndev, void *addr)
struct device *emac_dev = &priv->ndev->dev;
struct sockaddr *sa = addr;
if (!is_valid_ether_addr(sa->sa_data))
return -EINVAL;
/* Store mac addr in priv and rx channel and set it in EMAC hw */
memcpy(priv->mac_addr, sa->sa_data, ndev->addr_len);
memcpy(rxch->mac_addr, sa->sa_data, ndev->addr_len);
memcpy(ndev->dev_addr, sa->sa_data, ndev->addr_len);
emac_setmac(priv, EMAC_DEF_RX_CH, rxch->mac_addr);
/* If the interface is down - rxch is NULL. */
/* MAC address is configured only after the interface is enabled. */
if (netif_running(ndev)) {
memcpy(rxch->mac_addr, sa->sa_data, ndev->addr_len);
emac_setmac(priv, EMAC_DEF_RX_CH, rxch->mac_addr);
}
if (netif_msg_drv(priv))
dev_notice(emac_dev, "DaVinci EMAC: emac_dev_setmac_addr %pM\n",