linux-kernel - Re: [PATCH] x86/vmware: Fix hypercall clobbers

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: <CAHk-=wjEwfcj6DWWh8mKr+O4ospkfNSC1GAvAcwfWAUAyTRq5A@mail.gmail.com>
Date: Fri, 6 Feb 2026 15:08:29 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Josh Poimboeuf <jpoimboe@...nel.org>, Paolo Bonzini <pbonzini@...hat.com>
Cc: Thomas Gleixner <tglx@...-um.de>, Thorsten Leemhuis <regressions@...mhuis.info>, 
	Alexey Makhalov <alexey.makhalov@...adcom.com>, x86@...nel.org, linux-kernel@...r.kernel.org, 
	Ajay Kaher <ajay.kaher@...adcom.com>, bcm-kernel-feedback-list@...adcom.com, 
	Peter Zijlstra <peterz@...radead.org>, Justin Forbes <jforbes@...oraproject.org>, 
	Linux kernel regressions list <regressions@...ts.linux.dev>
Subject: Re: [PATCH] x86/vmware: Fix hypercall clobbers

On Fri, 6 Feb 2026 at 14:38, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> I'm going to change that commit message to make it clear that it's a
> QEMU bug, plain and simple. There's no point in claiming this fixes a
> kernel bug when it's a pure workaround for a bug elsewhere.

I have created an issue at gitlab:

   https://gitlab.com/qemu-project/qemu/-/issues/3293

and hopefully this will get fixed in QEMU at some point.

Adding Paolo to the participants, since he presumably knows what to do
with qemu, since he touched that qemu file a couple of months ago.

(The fix looks trivial, as suggested by Alexey: just change the
"uint32_t data[6];" to use target_ulong instead of uint32_t, but
somebody needs to test it and maybe qemu has other rules for register
types)

              Linus