* [PATCH] bridge: Don't put partly initialized fdb into hash
@ 2011-02-04 15:58 Pavel Emelyanov
2011-02-04 21:02 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Pavel Emelyanov @ 2011-02-04 15:58 UTC (permalink / raw)
To: Stephen Hemminger, David Miller; +Cc: bridge, Linux Netdev List
The fdb_create() puts a new fdb into hash with only addr set. This is
not good, since there are callers, that search the hash w/o the lock
and access all the other its fields.
Applies to current netdev tree.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
---
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 2872393..88485cc 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -328,12 +328,12 @@ static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC);
if (fdb) {
memcpy(fdb->addr.addr, addr, ETH_ALEN);
- hlist_add_head_rcu(&fdb->hlist, head);
-
fdb->dst = source;
fdb->is_local = is_local;
fdb->is_static = is_local;
fdb->ageing_timer = jiffies;
+
+ hlist_add_head_rcu(&fdb->hlist, head);
}
return fdb;
}
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] bridge: Don't put partly initialized fdb into hash
2011-02-04 15:58 [PATCH] bridge: Don't put partly initialized fdb into hash Pavel Emelyanov
@ 2011-02-04 21:02 ` David Miller
0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2011-02-04 21:02 UTC (permalink / raw)
To: xemul; +Cc: shemminger, bridge, netdev
From: Pavel Emelyanov <xemul@parallels.com>
Date: Fri, 04 Feb 2011 18:58:08 +0300
> The fdb_create() puts a new fdb into hash with only addr set. This is
> not good, since there are callers, that search the hash w/o the lock
> and access all the other its fields.
>
> Applies to current netdev tree.
>
> Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Whoa, good catch. Applied, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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