diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index 5c9021ea3a79..47469b775808 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -542,6 +542,9 @@ size_t fib_nlmsg_size(struct fib_info *fi) struct fib_nh_common *nhc = fib_info_nhc(fi, i); size_t nhsize; + if (!nhc) + break; + nhsize = fib_nexthop_nlmsg_size(nhc, nhs != 1); if (nhs != 1) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 37674d76f90f..268d8821f7e0 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1082,6 +1082,8 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) for (nhsel = 0; nhsel < fib_info_num_path(res.fi); nhsel++) { nhc = fib_info_nhc(res.fi, nhsel); + if (!nhc) + break; update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, jiffies + net->ipv4.ip_rt_mtu_expires); } @@ -3168,6 +3170,9 @@ int fib_dump_info_fnhe(struct sk_buff *skb, struct netlink_callback *cb, struct fnhe_hash_bucket *bucket; int err; + if (!nhc) + break; + if (nhc->nhc_flags & RTNH_F_DEAD) continue;