linux-kernel - Re: [PATCH] selftests: kvm: fix overlapping addresses in memslot_perf

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: <285623f6-52e4-7f8d-fab6-0476a00af68b@oracle.com>
Date:   Fri, 28 May 2021 21:51:48 +0200
From:   "Maciej S. Szmigiero" <maciej.szmigiero@...cle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH] selftests: kvm: fix overlapping addresses in
 memslot_perf_test

On 28.05.2021 21:11, Paolo Bonzini wrote:
> The memory that is allocated in vm_create is already mapped close to
> GPA 0, because test_execute passes the requested memory to
> prepare_vm.  This causes overlapping memory regions and the
> test crashes.  For simplicity just move MEM_GPA higher.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>

I am not sure that I understand the issue correctly, is vm_create_default()
already reserving low GPAs (around 0x10000000) on some arches or run
environments?

Thanks,
Maciej