netdev - Re: [PATCH] ipv6: ip6_fib: fix possible null-pointer-dereference in ipv6_route_native_seq

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Message-ID: <359e4cfa-d1f4-41ce-a986-89440fcf66cd@web.de>
Date: Sat, 2 Nov 2024 18:30:22 +0100
From: Markus Elfring <Markus.Elfring@....de>
To: Yi Zou <03zouyi09.25@...il.com>, netdev@...r.kernel.org
Cc: David Ahern <dsahern@...nel.org>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 LKML <linux-kernel@...r.kernel.org>, 21210240012@...udan.edu.cn,
 21302010073@...udan.edu.cn
Subject: Re: [PATCH] ipv6: ip6_fib: fix possible null-pointer-dereference in
 ipv6_route_native_seq_show

>     Check if fib6_nh is non-NULL before accessing fib6_nh->fib_nh_gw_family
>     in ipv6_route_native_seq_show() to prevent a null-pointer dereference.
>     Assign dev as dev = fib6_nh ? fib6_nh->fib_nh_dev : NULL to ensure safe
>     handling when nexthop_fib6_nh(rt->nh) returns NULL.
Would you like to send another improved patch version (instead of a reply)
according to a change review?

Regards,
Markus