netdev - Re: [PATCH iproute2] iplink: work around rtattr length limits for IFLA_VFINFO

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Message-ID: <CAKOOJTyD-et6psSo0v-zvycFpJCLLmdSCr792OQzx_cLM2SjLw@mail.gmail.com>
Date:   Mon, 18 Jan 2021 09:34:27 -0800
From:   Edwin Peer <edwin.peer@...adcom.com>
To:     David Ahern <dsahern@...il.com>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Michal Kubecek <mkubecek@...e.cz>,
        netdev <netdev@...r.kernel.org>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Andrew Gospodarek <andrew.gospodarek@...adcom.com>,
        Michael Chan <michael.chan@...adcom.com>
Subject: Re: [PATCH iproute2] iplink: work around rtattr length limits for IFLA_VFINFO_LIST

On Sun, Jan 17, 2021 at 7:48 PM David Ahern <dsahern@...il.com> wrote:

> IMHO this is a kernel bug that should be fixed. An easy fix to check the
> overflow in nla_nest_end and return an error. Sadly, nla_nest_end return
> code is ignored and backporting any change to fix that will be
> nightmare. A warning will identify places that need to be fixed.

Assuming we fix nla_nest_end() and error in some way, how does that
assist iproute2?

Regards,
Edwin Peer

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