linux-kernel - Re: [PATCH v6 9/9] x86/nmi: Print source information with the unknown NMI console message

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: <7abb2bf8-be36-41b1-bb6e-e23a984a4ab6@intel.com>
Date: Wed, 11 Jun 2025 14:39:01 -0700
From: Sohil Mehta <sohil.mehta@...el.com>
To: "H. Peter Anvin" <hpa@...or.com>, Xin Li <xin@...or.com>,
	<x86@...nel.org>, <linux-kernel@...r.kernel.org>
CC: Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen
	<dave.hansen@...ux.intel.com>, Peter Zijlstra <peterz@...radead.org>, "Sean
 Christopherson" <seanjc@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
	Kan Liang <kan.liang@...ux.intel.com>, Tony Luck <tony.luck@...el.com>,
	"Zhang Rui" <rui.zhang@...el.com>, Steven Rostedt <rostedt@...dmis.org>,
	"Andrew Cooper" <andrew.cooper3@...rix.com>, "Kirill A . Shutemov"
	<kirill.shutemov@...ux.intel.com>, Jacob Pan <jacob.pan@...ux.microsoft.com>,
	Andi Kleen <ak@...ux.intel.com>, Kai Huang <kai.huang@...el.com>, "Sandipan
 Das" <sandipan.das@....com>, <linux-perf-users@...r.kernel.org>,
	<linux-edac@...r.kernel.org>, <kvm@...r.kernel.org>,
	<linux-pm@...r.kernel.org>, <linux-trace-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 9/9] x86/nmi: Print source information with the unknown
 NMI console message

On 6/4/2025 8:41 AM, H. Peter Anvin wrote:
> I think printing the bitmap is fine for unknown bits set... after
> all, you might have surprise vectors. Maybe a list would be cleaner
> by some definition, but we already print bitmaps all over the place.
> It is not critical as long as the information necessary for
> debugging is there. In fact, it is often better for the information
> to be compact so users don't get tempted to abbreviate a bug report.
Sure, will print the full bitmap here. Since this is the unknown NMI
message, it may have unexpected bits set in the bitmap.