linux-kernel - Re: [PATCH 0/3] xtensa: clean up __user annotations in asm/uaccess.h

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAMo8BfJrxt2_Zr4w2=ebfEhsXeZbJ0yUb+i57ELSjnZd=7383g@mail.gmail.com>
Date:   Fri, 22 May 2020 15:35:34 -0700
From:   Max Filippov <jcmvbkbc@...il.com>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     "open list:TENSILICA XTENSA PORT (xtensa)" 
        <linux-xtensa@...ux-xtensa.org>, Chris Zankel <chris@...kel.net>,
        Arnd Bergmann <arnd@...db.de>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/3] xtensa: clean up __user annotations in asm/uaccess.h

On Fri, May 22, 2020 at 2:58 PM Al Viro <viro@...iv.linux.org.uk> wrote:
>
> On Fri, May 22, 2020 at 02:41:50PM -0700, Max Filippov wrote:
> Useful test:
>
> void __user *f(void __user * __user *p)
> {
>         void __user *q;
>         (void)get_user(q, p);
>         return q;
> }

I think this change passes this test, i.e. originally reported warning
does not show up.
There's other kind of warning that it triggers:  'Using plain integer
as NULL pointer',
I'll post an updated version that fixes that as well.

-- 
Thanks.
-- Max