linux-2.6.7 Equalizer Load-balancer. eql.c. local non-privilegedDoS

[Vitaly V. Bursov]

Hello,

there are multiple vulns in drivers/net/eql.c

====
static int eql_g_slave_cfg(struct net_device *dev, slave_config_t __user *scp)
{
...
        if (copy_from_user(&sc, scp, sizeof (slave_config_t)))
                return -EFAULT;

        slave_dev = dev_get_by_name(sc.slave_name);

        ret = -EINVAL;

        spin_lock_bh(&eql->queue.lock);
        if (eql_is_slave(slave_dev)) {
...
====

and

====
static int eql_s_slave_cfg(struct net_device *dev, slave_config_t __user *scp)  
{
....
        if (copy_from_user(&sc, scp, sizeof (slave_config_t)))
                return -EFAULT;

        eql = dev->priv;
        slave_dev = dev_get_by_name(sc.slave_name);

        ret = -EINVAL;

        spin_lock_bh(&eql->queue.lock);
        if (eql_is_slave(slave_dev)) {
====

if there is no such device, dev_get_by_name returns NULL and everything dies.
Exploiting this is trivial.


Hopefully somebody will check this file carefully and fix it.

I am not in a list.
-- 
Thanks,
Vitaly
GPG Key ID: F95A23B9

Attachment: pgp00000.pgp
Description: PGP signature