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bonding: fix NULL pointer deref in startup processing 

Fix the "are we creating a duplicate" check to not compare
the name if the name is NULL (meaning that the system should select
a name).  Bug reported by Benny Amorsen <benny+usenet@amorsen.dk>.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jay Vosburgh 2008-01-29 18:07:45 -08:00 committed by David S. Miller
parent 80ee5ad231
commit 4fe4763cd8
1 changed files with 9 additions and 7 deletions
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16
drivers/net/bonding/bond_main.c
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@ -4896,14 +4896,16 @@ int bond_create(char *name, struct bond_params *params, struct bonding **newbond
down_write(&bonding_rwsem);
/* Check to see if the bond already exists. */
list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) {
printk(KERN_ERR DRV_NAME
if (name) {
list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) {
printk(KERN_ERR DRV_NAME
": cannot add bond %s; it already exists\n",
name);
res = -EPERM;
goto out_rtnl;
}
name);
res = -EPERM;
goto out_rtnl;
}
}
bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
ether_setup);