af_packet: move strict addr_len check right before dev_[mc/unicast]_[add/del]
authorJiri Pirko <jpirko@redhat.com>
Tue, 2 Mar 2010 20:40:01 +0000 (20:40 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 3 Mar 2010 09:04:38 +0000 (01:04 -0800)
commit1162563f82b434e3099c9e6c1bbdba846d792f0d
tree3903e4265740f2b2049615d7178aa434252bf5f3
parent9fe969345b10931319b3f1e7034fbdeb786de234
af_packet: move strict addr_len check right before dev_[mc/unicast]_[add/del]

My previous patch 914c8ad2d18b62ad1420f518c0cab0b0b90ab308 incorrectly changed
the length check in packet_mc_add to be more strict. The problem is that
userspace is not filling this field (and it stays zeroed) in case of setting
PACKET_MR_PROMISC or PACKET_MR_ALLMULTI. So move the strict check to the point
in path where the addr_len must be set correctly.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Reported-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/packet/af_packet.c