linux-kernel - Re: [PATCH] net/ieee802154: fix uninit value bug in dgram

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Message-ID: <CAK-6q+g-L-6kKW69DYxgXvLdfChF+oQsmi-Y4cvBK2ji2m4WZA@mail.gmail.com>
Date:   Wed, 24 Aug 2022 08:38:22 -0400
From:   Alexander Aring <aahringo@...hat.com>
To:     zhang haiming <tcs.kernel@...il.com>
Cc:     linux-wpan - ML <linux-wpan@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net/ieee802154: fix uninit value bug in dgram_sendmsg

Hi,

cc mailing lists again.

On Wed, Aug 24, 2022 at 7:55 AM zhang haiming <tcs.kernel@...il.com> wrote:
>
> If msg_namelen is too small like 1, the addr_type field will be
> unexpected. Meanwhile, check msg_namelen < sizeof(*daddr) is

Then check if space for addr_type is available, if not -EINVAL. If
addr_type available, evaluate it, if it's unknown -EINVAL, the minimum
length differs here if it's known.

> necessary and enough as dgram_bind and dgram_connect did.
>

you probably found similar issues.

It is a nitpick and I see that the current behaviour is not correct here.

- Alex