Unverified Commit 56ee05a5 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!2370 ipv4: fix null-deref in ipv4_link_failure 

Merge Pull Request from: @ci-robot 
 
PR sync from: Lu Wei <luwei32@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/2NVOLPN6QHS7Z5IML4ZDIB6VRF6LTRL7/ 
 
https://gitee.com/src-openeuler/kernel/issues/I85DZB 
 
Link:https://gitee.com/openeuler/kernel/pulls/2370

 

Reviewed-by: default avatarYue Haibing <yuehaibing@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents 84335135 d3c66b11

net/ipv4/route.c

+3 −1
Original line number Diff line number Diff line
@@ -1240,6 +1240,7 @@ static struct dst_entry *ipv4_dst_check(struct dst_entry *dst, u32 cookie) 


static void ipv4_send_dest_unreach(struct sk_buff *skb)

{

	struct net_device *dev;

	struct ip_options opt;

	int res;
@@ -1257,7 +1258,8 @@ static void ipv4_send_dest_unreach(struct sk_buff *skb) 
		opt.optlen = ip_hdr(skb)->ihl * 4 - sizeof(struct iphdr);



		rcu_read_lock();

		res = __ip_options_compile(dev_net(skb->dev), &opt, skb, NULL);

		dev = skb->dev ? skb->dev : skb_rtable(skb)->dst.dev;

		res = __ip_options_compile(dev_net(dev), &opt, skb, NULL);

		rcu_read_unlock();



		if (res)