linux-kernel - Re: [GIT PULL] x86/platform updates for v5.10

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

Date:   Mon, 12 Oct 2020 14:15:55 -0700
From:   Mike Travis <mike.travis@....com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Borislav Petkov <bp@...e.de>
Cc:     x86-ml <x86@...nel.org>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] x86/platform updates for v5.10



On 10/12/2020 2:10 PM, Linus Torvalds wrote:
> On Mon, Oct 12, 2020 at 3:10 AM Borislav Petkov <bp@...e.de> wrote:
>>
>> please pull the x86/platform queue.
> 
> Hmm. I didn't immediately notice this new warning, because it only
> happens with the clang build that I don't do in between every pull.
> 
> But this pull causes new warnings from clang:
> 
> arch/x86/platform/uv/uv_nmi.c:250:23: warning: implicit conversion
> from 'unsigned long' to 'int' changes value from 1152921504606846976
> to 0 [-Wconstant-conversion]
>                  uvh_nmi_mmrx_mask = UVH_EVENT_OCCURRED0_EXTIO_INT0_MASK;
>                                    ~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> and I think that warning is correct, and the code is wrong.
> 
> In particular, we have
> 
>       static int uvh_nmi_mmrx_mask;
> 
> so it's a signed 32-bit integer, and the code is treating it like it's
> a 64-bit mask.
> 
> Of course, it also looks like that 'uvh_nmi_mmrx_mask' thing is a
> write-only variable so it doesn't matter, but can we _please_ get this
> code fixed ASAP?

Yes, I'll look at it right now.  Thanks.
> 
>                       Linus
>