diff options
| author | Patrick McHardy <kaber@trash.net> | 2011-01-20 03:00:42 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-20 23:28:54 -0800 |
| commit | ffa934f192c8381061242eb170419266ef229902 (patch) | |
| tree | fb09699460d85166bfa64c524eb6eda01b899c4a /net/core/rtnetlink.c | |
| parent | d52344a7ae8a3fb660636f7de4f1c542b0036cbb (diff) | |
| download | linux-ffa934f192c8381061242eb170419266ef229902.tar.bz2 | |
rtnetlink: fix link attribute validation with IFLA_GROUP
rtnl_group_changelink() is invoked by rtnl_newlink() before the link
attributes have been validated. Additionally the group changes are
performed even if NLM_F_CREATE is specified and a new link is
created, while more reasonable semantics would be to set the group
value on the newly created link.
Fix both problems by moving the rtnl_group_changelink() invocation
down to the handling of non-existant links without NLM_F_CREATE()
and add a dev_set_group() call to rtnl_create_link().
Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Vlad Dogaru <ddvlad@rosedu.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/rtnetlink.c')
| -rw-r--r-- | net/core/rtnetlink.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index a0b2eeb3b610..310eb804e092 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1548,6 +1548,8 @@ struct net_device *rtnl_create_link(struct net *src_net, struct net *net, set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); if (tb[IFLA_LINKMODE]) dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); + if (tb[IFLA_GROUP]) + dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); return dev; @@ -1606,10 +1608,6 @@ replay: else { if (ifname[0]) dev = __dev_get_by_name(net, ifname); - else if (tb[IFLA_GROUP]) - return rtnl_group_changelink(net, - nla_get_u32(tb[IFLA_GROUP]), - ifm, tb); else dev = NULL; } @@ -1676,8 +1674,13 @@ replay: return do_setlink(dev, ifm, tb, ifname, modified); } - if (!(nlh->nlmsg_flags & NLM_F_CREATE)) + if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { + if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) + return rtnl_group_changelink(net, + nla_get_u32(tb[IFLA_GROUP]), + ifm, tb); return -ENODEV; + } if (ifm->ifi_index) return -EOPNOTSUPP; |