[IPV6]: Track device renames in snmp6.

When network device's are renamed, the IPV6 snmp6 code gets confused. It doesn't track name changes so it will OOPS when network device's are removed. The fix is trivial, just unregister/re-register in notify handler. Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
yshchan · Apr 29, 2007 · 5632c51 · 5632c51
1 parent aad97f3
commit 5632c51
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
@@ -2359,17 +2359,19 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 		break;
 
 	case NETDEV_CHANGENAME:
-#ifdef CONFIG_SYSCTL
 		if (idev) {
+			snmp6_unregister_dev(idev);
+#ifdef CONFIG_SYSCTL
 			addrconf_sysctl_unregister(&idev->cnf);
 			neigh_sysctl_unregister(idev->nd_parms);
 			neigh_sysctl_register(dev, idev->nd_parms,
 					      NET_IPV6, NET_IPV6_NEIGH, "ipv6",
 					      &ndisc_ifinfo_sysctl_change,
 					      NULL);
 			addrconf_sysctl_register(idev, &idev->cnf);
-		}
 #endif
+			snmp6_register_dev(idev);
+		}
 		break;
 	}
 

diff --git a/net/ipv6/proc.c b/net/ipv6/proc.c
@@ -223,6 +223,7 @@ int snmp6_unregister_dev(struct inet6_dev *idev)
 		return -EINVAL;
 	remove_proc_entry(idev->stats.proc_dir_entry->name,
 			  proc_net_devsnmp6);
+	idev->stats.proc_dir_entry = NULL;
 	return 0;
 }