linux-kernel - RE: [PATCH v2] x86/mce: work around an erratum on fast string copy instructions.

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]

Message-ID: <0de9b9b5800e4e4a879fddc74b67bfec@intel.com>
Date:   Fri, 18 Feb 2022 22:38:10 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Borislav Petkov <bp@...en8.de>, Jue Wang <juew@...gle.com>
CC:     "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "patches@...ts.linux.dev" <patches@...ts.linux.dev>
Subject: RE: [PATCH v2] x86/mce: work around an erratum on fast string copy
 instructions.

> do we really need that printk in there?

I think we do. That CPU is now running in degraded mode (fast strings disabled) ... sysadmins will want to know that.

> If so, we can sandwich around it with nstrumentation_begin() and _end()...

I guess so ... this stuff is all Greek to me.

-Tony