tree 6bd88b669c8c68ac4d9008e00566ca15e43a6ff4
parent 8877870f8a8127b653f8c9a55c6b4de9f96f639b
author Thomas Graf <tgraf@infradead.org> 1289490479 +0000
committer David S. Miller <davem@davemloft.net> 1289587989 -0800

rtnetlink: Fix message size calculation for link messages

nlmsg_total_size() calculates the length of a netlink message
including header and alignment. nla_total_size() calculates the
space an individual attribute consumes which was meant to be used
in this context.

Also, ensure to account for the attribute header for the
IFLA_INFO_XSTATS attribute as implementations of get_xstats_size()
seem to assume that we do so.

The addition of two message headers minus the missing attribute
header resulted in a calculated message size that was larger than
required. Therefore we never risked running out of skb tailroom.

Signed-off-by: Thomas Graf <tgraf@infradead.org>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>