From: Paolo Bonzini <pbonzini@redhat.com>
To: Andy Lutomirski <luto@kernel.org>,
Tom Lendacky <thomas.lendacky@amd.com>,
Joerg Roedel <joro@8bytes.org>,
"Christopherson, Sean J" <sean.j.christopherson@intel.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
X86 ML <x86@kernel.org>,
"Chang S. Bae" <chang.seok.bae@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Sasha Levin <sashal@kernel.org>, Borislav Petkov <bp@alien8.de>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: FSGSBASE causing panic on 5.9-rc1
Date: Thu, 20 Aug 2020 15:43:16 +0200 [thread overview]
Message-ID: <aab48f12-5c2a-8e01-8dcb-16669fda7526@redhat.com> (raw)
In-Reply-To: <CALCETrUArZ04UqJjp2mEheuMpZyPwLeEgGM7mdDdmWxmx=GN4Q@mail.gmail.com>
On 19/08/20 23:25, Andy Lutomirski wrote:
> wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase);
> load_gs_index(svm->host.gs);
>
> Surely that should do load_gs_index() *before* wrmsrl(). But that's
> not the problem at hand.
The wrmsrl is writing the inactive GS base so the ordering between
load_gs_index and wrmsrl(MSR_KERNEL_GS_BASE) should be irrelevant?
Paolo
next prev parent reply other threads:[~2020-08-20 13:47 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-19 18:07 Tom Lendacky
2020-08-19 18:19 ` Tom Lendacky
2020-08-19 21:25 ` Andy Lutomirski
2020-08-20 0:21 ` Andy Lutomirski
2020-08-20 15:10 ` Sean Christopherson
2020-08-20 15:21 ` Tom Lendacky
2020-08-20 15:55 ` Andy Lutomirski
2020-08-20 16:17 ` Tom Lendacky
2020-08-20 16:30 ` Tom Lendacky
2020-08-20 17:41 ` Paolo Bonzini
2020-08-20 18:34 ` Tom Lendacky
2020-08-20 18:38 ` Jim Mattson
2020-08-20 18:39 ` Jim Mattson
2020-08-20 18:41 ` Tom Lendacky
2020-08-20 19:04 ` Tom Lendacky
2020-08-20 19:05 ` Tom Lendacky
2020-08-20 20:07 ` Dave Hansen
2020-08-20 20:15 ` Tom Lendacky
2020-08-20 20:36 ` Andy Lutomirski
2020-08-20 22:05 ` Sean Christopherson
2020-08-20 22:07 ` Andy Lutomirski
2020-08-20 22:34 ` Sean Christopherson
2020-08-21 0:00 ` Tom Lendacky
2020-08-21 1:56 ` Sean Christopherson
2020-08-20 18:43 ` Bae, Chang Seok
2020-08-20 13:43 ` Paolo Bonzini [this message]
2020-08-20 17:51 ` Andy Lutomirski
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