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netlink: have length check of rtnl msg before deref

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When the legacy array rtm_min still exists, the length check within
these functions is covered by rtm_min[RTM_NEWTFILTER],
rtm_min[RTM_NEWQDISC] and rtm_min[RTM_NEWTCLASS].

But after Thomas Graf removed rtm_min several days ago, these checks
are missing. Other doit functions should be OK.

Signed-off-by: Hong Zhiguo <honkiko@gmail.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hong zhi guo
2013-03-25 17:36:33 +00:00
committed by David S. Miller
parent 8dc57da2e2
commit de179c8c12
2 changed files with 26 additions and 19 deletions
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9
net/sched/cls_api.c
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@@ -141,7 +141,12 @@ static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n)
if ((n->nlmsg_type != RTM_GETTFILTER) && !capable(CAP_NET_ADMIN))
return -EPERM;
replay:
err = nlmsg_parse(n, sizeof(*t), tca, TCA_MAX, NULL);
if (err < 0)
return err;
t = nlmsg_data(n);
protocol = TC_H_MIN(t->tcm_info);
prio = TC_H_MAJ(t->tcm_info);
@@ -164,10 +169,6 @@ replay:
if (dev == NULL)
return -ENODEV;
err = nlmsg_parse(n, sizeof(*t), tca, TCA_MAX, NULL);
if (err < 0)
return err;
/* Find qdisc */
if (!parent) {
q = dev->qdisc;