linux-kernel - RE: [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction

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: <BYAPR21MB16883A15812E1D20FC28DF76D73FA@BYAPR21MB1688.namprd21.prod.outlook.com>
Date:   Fri, 21 Jul 2023 14:21:42 +0000
From:   "Michael Kelley (LINUX)" <mikelley@...rosoft.com>
To:     David Laight <David.Laight@...LAB.COM>,
        Peter Zijlstra <peterz@...radead.org>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        Dexuan Cui <decui@...rosoft.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "hpa@...or.com" <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: RE: [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks
 ENDBR instruction

From: David Laight <David.Laight@...LAB.COM> Sent: Friday, July 21, 2023 7:07 AM
> 
> ...
> > I realized in the middle of the night that my reply was nonsense. :-(
> > pr_warn() makes the message visible when pr_info() might not.  I'm
> > happy to change to pr_warn().
> 
> PANIC_ON_WARN??
> 

panic_on_warn applies to WARN() and variants.  pr_warn() is unrelated;
it's just kernel logging level 4 vs. logging level 6 for pr_info().

Michael