linux-kernel - Re: [PATCH v2 03/11] RISC-V: KVM: Return correct code for hsm stop function

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]

Date:   Fri, 13 Jan 2023 08:25:31 +0100
From:   Andrew Jones <ajones@...tanamicro.com>
To:     Atish Kumar Patra <atishp@...osinc.com>
Cc:     linux-kernel@...r.kernel.org, Anup Patel <anup@...infault.org>,
        Atish Patra <atishp@...shpatra.org>,
        Guo Ren <guoren@...nel.org>, kvm-riscv@...ts.infradead.org,
        kvm@...r.kernel.org, linux-riscv@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Sergey Matyukevich <sergey.matyukevich@...tacore.com>,
        Eric Lin <eric.lin@...ive.com>, Will Deacon <will@...nel.org>
Subject: Re: [PATCH v2 03/11] RISC-V: KVM: Return correct code for hsm stop
 function

On Thu, Jan 12, 2023 at 10:25:06AM -0800, Atish Kumar Patra wrote:
> On Thu, Jan 12, 2023 at 2:28 AM Andrew Jones <ajones@...tanamicro.com> wrote:
> >
> > On Thu, Dec 15, 2022 at 09:00:38AM -0800, Atish Patra wrote:
> > > According to the SBI specification, the stop function can only
> > > return error code SBI_ERR_FAILED. However, currently it returns
> > > -EINVAL which will be mapped SBI_ERR_INVALID_PARAM.
> >
> > I presume the mapping referred to here is kvm_linux_err_map_sbi().
> > If so, then -EPERM isn't correct either. That maps to SBI_ERR_DENIED.
> > The only thing that will ensure we get SBI_ERR_FAILURE (-1) is
> > anything not handled by the kvm_linux_err_map_sbi switch, as we
> > need to use the default.
> >
> 
> It returns SBI_ERR_FAILURE in the next patch when kvm_linux_err_map_sbi
> is removed. Maybe I should drop this patch. The next patch does the
> correct thing anyways.

Yeah, I saw that, but then we silently fix a bug in the next patch.
I like that this is a separate patch, but it should do what it says
it's doing :-)

Thanks,
drew