linux-kernel - Re: [PATCH net-next v2] net/ipv6: silence 'passing zero to ERR

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Date:   Thu, 13 Apr 2023 18:32:24 -0600
From:   David Ahern <dsahern@...nel.org>
To:     Haoyi Liu <iccccc@...t.edu.cn>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     hust-os-kernel-patches@...glegroups.com, yalongz@...t.edu.cn,
        error27@...il.com, Dongliang Mu <dzm91@...t.edu.cn>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2] net/ipv6: silence 'passing zero to ERR_PTR()'
 warning

On 4/13/23 4:10 AM, Haoyi Liu wrote:
> Smatch complains that if xfrm_lookup() returns NULL then this does a
> weird thing with "err":

xfrm_lookup is a wrapper around xfrm_lookup_with_ifid which returns
either either a valid dst or ERR_PTR(err).