Re: [PATCH v4 0/3] KVM: guest_memfd: Fix signed offset+size goof

[Sean Christopherson]

On Tue, 02 Jun 2026 10:09:18 -0700, Sean Christopherson wrote:
> Fix a bug where KVM fails to reject a comically large offset into guest_memfd
> if offset+size results in a signed, negative value.  Add a testcase to prove
> the bug, and to serve as a regression test.
> 
> Note, v1 and v2 was part of larger series.
> 
> v4:
>  - Collect tags. [Mike, Ackerley]
>  - Use "INT64_MAX - page_size" instead of hardcoded literal. [Sashiko, Ackerley]
> 
> [...]

Applied to kvm-x86 gmem, thanks!

[1/3] KVM: guest_memfd: Treat memslot binding offset+size as unsigned values
      https://github.com/kvm-x86/linux/commit/eba85fee7fc6
[2/3] KVM: selftests: Expand the guest_memfd test macros to allow passing the VM
      https://github.com/kvm-x86/linux/commit/b7a23fb0ed7e
[3/3] KVM: selftests: Add guest_memfd regression test signed offset+size bug
      https://github.com/kvm-x86/linux/commit/b408b52e7111

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https://github.com/kvm-x86/linux/tree/next