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Message-ID: <CANn89iK3qKO6-rr+pNwuk7p--SB9a1sjar00TRN=T_uuh+QZuw@mail.gmail.com> Date: Tue, 28 Feb 2017 15:14:40 -0800 From: Eric Dumazet <edumazet@...gle.com> To: David Ahern <dsa@...ulusnetworks.com> Cc: Eric Dumazet <eric.dumazet@...il.com>, Dmitry Vyukov <dvyukov@...gle.com>, David Miller <davem@...emloft.net>, Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>, netdev <netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, Cong Wang <xiyou.wangcong@...il.com>, Yuchung Cheng <ycheng@...gle.com>, Willem de Bruijn <willemb@...gle.com>, syzkaller <syzkaller@...glegroups.com> Subject: Re: net: GPF in rt6_nexthop_info On Tue, Feb 28, 2017 at 3:09 PM, David Ahern <dsa@...ulusnetworks.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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