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List:       linux-kernel
Subject:    Re: net: GPF in rt6_nexthop_info
From:       Eric Dumazet <edumazet () google ! com>
Date:       2017-02-28 23:14:40
Message-ID: CANn89iK3qKO6-rr+pNwuk7p--SB9a1sjar00TRN=T_uuh+QZuw () mail ! gmail ! com
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On Tue, Feb 28, 2017 at 3:09 PM, David Ahern <dsa@cumulusnetworks.com> wrote:
> On 2/28/17 5:10 AM, Eric Dumazet wrote:
>> David, rt->rt6i_idev can be NULL.
>
> Do you know of an example where rt6i_idev can be NULL - besides the
> null_entry rt which is null only because of init order?


I might have been mistaken, but many points in net/ipv6/route.c test
rt->rt6i_idev being NULL or not before dereferencing it.

Maybe other rts (other than null_entry) share this property.
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