1 files changed, 12 insertions, 1 deletions

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 1fba6439fc57..cac06c43f004 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -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:
@@ -771,6 +776,8 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb )
                                        .nl_u = { .ip4_u = { .daddr = frn->fl_addr,
                                                             .tos = frn->fl_tos,
                                                             .scope = frn->fl_scope } } };
+
+        frn->err = -ENOENT;
         if (tb) {
                 local_bh_disable();
 
@@ -782,6 +789,7 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb )
                         frn->nh_sel = res.nh_sel;
                         frn->type = res.type;
                         frn->scope = res.scope;
+                        fib_res_put(&res);
                 }
                 local_bh_enable();
         }
@@ -796,6 +804,9 @@ static void nl_fib_input(struct sock *sk, int len)
         struct fib_table *tb;
 
         skb = skb_dequeue(&sk->sk_receive_queue);
+        if (skb == NULL)
+                return;
+
         nlh = (struct nlmsghdr *)skb->data;
         if (skb->len < NLMSG_SPACE(0) || skb->len < nlh->nlmsg_len ||
             nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*frn))) {
@@ -808,7 +819,7 @@ static void nl_fib_input(struct sock *sk, int len)
 
         nl_fib_lookup(frn, tb);
 
-        pid = nlh->nlmsg_pid;           /*pid of sending process */
+        pid = NETLINK_CB(skb).pid;       /* pid of sending process */
         NETLINK_CB(skb).pid = 0;         /* from kernel */
         NETLINK_CB(skb).dst_group = 0;  /* unicast */
         netlink_unicast(sk, skb, pid, MSG_DONTWAIT);