From: Sasha Levin <sashal@kernel.org>
To: Adam Dunlap <acdunlap@google.com>
Cc: stable@vger.kernel.org, Peter Gonda <pgonda@google.com>,
Jacob Xu <jacobhxu@google.com>,
Dave Hansen <dave.hansen@linux.intel.com>
Subject: Re: Backport f79936545fb12 ("x86/sev-es: Allow copy_from_kernel_nofault() in earlier boot")
Date: Sun, 12 Nov 2023 13:45:35 -0500 [thread overview]
Message-ID: <ZVEdT6MwMH2ElB_f@sashalap> (raw)
In-Reply-To: <CAMBK9=YqXa11BUPBLnitvHRFYGdEX=J3S1ssq=iBWRYpGCynBA@mail.gmail.com>
On Fri, Nov 10, 2023 at 09:05:19AM -0800, Adam Dunlap wrote:
>commit f79936545fb122856bd78b189d3c7ee59928c751 upstream.
>
>This patch fixes a boot failure that happens with VMs running with
>SEV-ES or SEV-SNP when the guest kernel is compiled with a gcc version
>past 12.3 (or possibly earlier) due to undefined behavior. As far as I
>know, the UB has existed ever since SEV-ES guest support was merged in
>(I believe 5.9), but only started causing boot failures with the
>updated compiler. Thus, I propose backporting this patch to stable
>branches since 5.9.
Looks like its already queued for 5.15+, and needed some minor massaging
to get to 5.10.
--
Thanks,
Sasha
prev parent reply other threads:[~2023-11-12 18:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-10 17:05 Backport f79936545fb12 ("x86/sev-es: Allow copy_from_kernel_nofault() in earlier boot") Adam Dunlap
2023-11-12 18:45 ` Sasha Levin [this message]
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