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[IPv4] fib: Fix out of bound access of fib_props[]

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Fixes a typo which caused fib_props[] to have the wrong size
and makes sure the value used to index the array which is
provided by userspace via netlink is checked to avoid out of
bound access.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2007-03-24 20:32:54 -07:00 committed by David S. Miller
parent 954b2e7f4c
commit a0ee18b9b7
2 changed files with 6 additions and 1 deletions
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5
net/ipv4/fib_frontend.c
View file

@ -493,6 +493,11 @@ static int rtm_to_fib_config(struct sk_buff *skb, struct nlmsghdr *nlh,
cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid;
cfg->fc_nlinfo.nlh = nlh;
if (cfg->fc_type > RTN_MAX) {
err = -EINVAL;
goto errout;
}
nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), remaining) {
switch (attr->nla_type) {
case RTA_DST:

2
net/ipv4/fib_semantics.c
View file

@ -89,7 +89,7 @@ static const struct
{
int error;
u8 scope;
} fib_props[RTA_MAX + 1] = {
} fib_props[RTN_MAX + 1] = {
{
.error = 0,
.scope = RT_SCOPE_NOWHERE,