[PATCH] taskstats: fix? sk_buff size calculation

[Oleg Nesterov]

Again, I am not sure this patch is correct, it needs an ack...

prepare_reply() adds GENL_HDRLEN to the payload (genlmsg_total_size()),
but then it does genlmsg_put()->nlmsg_put(). This means we forget to
reserve a room for 'struct nlmsghdr', no?

Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>

--- STATS/kernel/taskstats.c~2_size	2006-10-29 16:39:10.000000000 +0300
+++ STATS/kernel/taskstats.c	2006-10-29 18:35:40.000000000 +0300
@@ -77,7 +77,8 @@ static int prepare_reply(struct genl_inf
 	/*
 	 * If new attributes are added, please revisit this allocation
 	 */
-	skb = nlmsg_new(genlmsg_total_size(size), GFP_KERNEL);
+	size = nlmsg_total_size(genlmsg_total_size(size));
+	skb = nlmsg_new(size, GFP_KERNEL);
 	if (!skb)
 		return -ENOMEM;
 

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