linux-kernel - Re: [PATCH 2/3] x86/cpu: fix unbootable VMs by inlining memcmp() in hypervisor_cpuid

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 for Android: free password hash cracker in your pocket

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

Message-ID: <c2536a0c-4632-48e9-badb-0e0e682abf8f@suse.com>
Date: Thu, 15 Aug 2024 15:32:31 +0200
From: Jürgen Groß <jgross@...e.com>
To: Alexey Dobriyan <adobriyan@...il.com>, boris.ostrovsky@...cle.com,
 tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
 dave.hansen@...ux.intel.com
Cc: linux-kernel@...r.kernel.org, x86@...nel.org, hpa@...or.com
Subject: Re: [PATCH 2/3] x86/cpu: fix unbootable VMs by inlining memcmp() in
 hypervisor_cpuid_base()

On 02.08.24 17:42, Alexey Dobriyan wrote:
> If this memcmp() is not inlined then PVH early boot code can call
> into KASAN-instrumented memcmp() which results in unbootable VMs:
> 
> 	pvh_start_xen
> 	xen_prepare_pvh
> 	xen_cpuid_base
> 	hypervisor_cpuid_base
> 	memcmp
> 
> Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>

Acked-by: Juergen Gross <jgross@...e.com>


Juergen