From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Ahern <dsahern@gmail.com>
Subject: Re: [Bug 199643] New: UBSAN: Undefined behaviour in
 ./include/net/route.h:240:2
Date: Tue, 8 May 2018 08:52:35 -0600
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 <20180508.001251.2189714817072679386.davem@davemloft.net>
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To: David Miller <davem@davemloft.net>, stephen@networkplumber.org
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On 5/7/18 10:12 PM, David Miller wrote:
> From: Stephen Hemminger <stephen@networkplumber.org>
> Date: Mon, 7 May 2018 10:34:00 -0700
> 
>> Subject: [Bug 199643] New: UBSAN: Undefined behaviour in ./include/net/route.h:240:2
> 
> That's an empty line in both of my trees.
> 

In 4.16.7 it is the dst_release in:

static inline void ip_rt_put(struct rtable *rt)
{
        /* dst_release() accepts a NULL parameter.
         * We rely on dst being first structure in struct rtable
         */
        BUILD_BUG_ON(offsetof(struct rtable, dst) != 0);
--->    dst_release(&rt->dst);
}