linux-kernel - Re: [PATCH 3/6] KVM: selftests: Create a new guest

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: <59730bad-4731-4c25-838d-9dafee1c6c44@redhat.com>
Date: Mon, 29 Sep 2025 11:18:02 +0200
From: David Hildenbrand <david@...hat.com>
To: Sean Christopherson <seanjc@...gle.com>,
 Paolo Bonzini <pbonzini@...hat.com>,
 Christian Borntraeger <borntraeger@...ux.ibm.com>,
 Janosch Frank <frankja@...ux.ibm.com>,
 Claudio Imbrenda <imbrenda@...ux.ibm.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
 Fuad Tabba <tabba@...gle.com>, Ackerley Tng <ackerleytng@...gle.com>
Subject: Re: [PATCH 3/6] KVM: selftests: Create a new guest_memfd for each
 testcase

On 26.09.25 18:31, Sean Christopherson wrote:
> Refactor the guest_memfd selftest to improve test isolation by creating a
> a new guest_memfd for each testcase.  Currently, the test reuses a single
> guest_memfd instance for all testcases, and thus creates dependencies
> between tests, e.g. not truncating folios from the guest_memfd instance
> at the end of a test could lead to unexpected results (see the PUNCH_HOLE
> purging that needs to done by in-flight the NUMA testcases[1]).
> 
> Invoke each test via a macro wrapper to create and close a guest_memfd
> to cut down on the boilerplate copy+paste needed to create a test.
> 
> Link: https://lore.kernel.org/all/20250827175247.83322-10-shivankg@amd.com
> Reported-by: Ackerley Tng <ackerleytng@...gle.com>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 
Cheers

David / dhildenb