linux-kernel - Re: KASAN: global-out-of-bounds Read in qmi_wwan

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Date:   Mon, 24 Jun 2019 18:26:51 +0200
From:   Bjørn Mork <bjorn@...k.no>
To:     Hillf Danton <hdanton@...a.com>
Cc:     Kristian Evensen <kristian.evensen@...il.com>,
        syzbot <syzbot+b68605d7fadd21510de1@...kaller.appspotmail.com>,
        andreyknvl@...gle.com, davem@...emloft.net,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: global-out-of-bounds Read in qmi_wwan_probe

Hillf Danton <hdanton@...a.com> writes:

> and wonder if the following works.
>
> -	info = (void *)&id->driver_info;
> +	info = (void *)id->driver_info;


Doh! Right you are.  Thanks to both you and Andrey for quick and good
help.

We obviously have some bad code patterns here, since this apparently
worked for Kristian by pure luck.


Bjørn