tree 4f7516628df9555580d33e9c6092ba40e9d41c65
parent e04449fcf2cd63dec176355a028bd28b4d469be9
author Daniel Borkmann <daniel@iogearbox.net> 1423158244 +0100
committer David S. Miller <davem@davemloft.net> 1423375990 -0800

rtnetlink: ifla_vf_policy: fix misuses of NLA_BINARY

ifla_vf_policy[] is wrong in advertising its individual member types as
NLA_BINARY since .type = NLA_BINARY in combination with .len declares the
len member as *max* attribute length [0, len].

The issue is that when do_setvfinfo() is being called to set up a VF
through ndo handler, we could set corrupted data if the attribute length
is less than the size of the related structure itself.

The intent is exactly the opposite, namely to make sure to pass at least
data of minimum size of len.

Fixes: ebc08a6f47ee ("rtnetlink: Add VF config code to rtnetlink")
Cc: Mitch Williams <mitch.a.williams@intel.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>