[PATCH] Fix taskstats size calculation (use the new genetlink utility functions)

The addition of the CSA patch pushed the size of struct taskstats to 256
bytes.  This exposed a problem with prepare_reply(), we were not allocating
space for the netlink and genetlink header.  It worked earlier because
alloc_skb() would align the skb to SMP_CACHE_BYTES, which added some additonal
bytes.

Signed-off-by: Balbir Singh <balbir@in.ibm.com>
Cc: Jamal Hadi <hadi@cyberus.ca>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jay Lan <jlan@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 2ed4040d0dc56423fa73ec0105c226357528f18e..c451af2ddb508d139b8a61f2366ab5bc190ad843 100644 (file)
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -75,7 +75,7 @@ static int prepare_reply(struct genl_info *info, u8 cmd, struct sk_buff **skbp,
        /*
         * If new attributes are added, please revisit this allocation
         */
-       skb = nlmsg_new(size, GFP_KERNEL);
+       skb = nlmsg_new(genlmsg_total_size(size), GFP_KERNEL);
        if (!skb)
                return -ENOMEM;