Files
linux/net/core
Jiri Benc c94eb3f964 net: fix rtnetlink IFF_PROMISC and IFF_ALLMULTI handling
[ Upstream commit b1beb681cb ]

When device flags are set using rtnetlink, IFF_PROMISC and IFF_ALLMULTI
flags are handled specially. Function dev_change_flags sets IFF_PROMISC and
IFF_ALLMULTI bits in dev->gflags according to the passed value but
do_setlink passes a result of rtnl_dev_combine_flags which takes those bits
from dev->flags.

This can be easily trigerred by doing:

tcpdump -i eth0 &
ip l s up eth0

ip sets IFF_UP flag in ifi_flags and ifi_change, which is combined with
IFF_PROMISC by rtnl_dev_combine_flags, causing __dev_change_flags to set
IFF_PROMISC in gflags.

Reported-by: Max Matveev <makc@redhat.com>
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-09 08:27:52 -07:00
..
2010-07-12 12:57:55 -07:00
2010-11-28 18:24:14 -08:00
2010-07-12 12:57:55 -07:00
2012-07-16 08:47:38 -07:00
2012-06-10 00:33:03 +09:00