Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <fda48075-783d-1833-5f1c-c10ca2880a56@gmail.com>
Date:   Mon, 14 Nov 2022 17:09:00 +0300
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.4.2
Subject: Re: [PATCH v2 1/5] x86/mm: Recompute physical address for every page
 of per-CPU CEA mapping
To:     Sean Christopherson <seanjc@google.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        x86@kernel.org
Cc:     "H. Peter Anvin" <hpa@zytor.com>,
        Alexander Potapenko <glider@google.com>,
        Andrey Konovalov <andreyknvl@gmail.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Vincenzo Frascino <vincenzo.frascino@arm.com>,
        linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
        syzbot+ffb4f000dc2872c93f62@syzkaller.appspotmail.com,
        syzbot+8cdd16fd5a6c0565e227@syzkaller.appspotmail.com
References: <20221110203504.1985010-1-seanjc@google.com>
 <20221110203504.1985010-2-seanjc@google.com>
Content-Language: en-US
From:   Andrey Ryabinin <ryabinin.a.a@gmail.com>
In-Reply-To: <20221110203504.1985010-2-seanjc@google.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk


On 11/10/22 23:35, Sean Christopherson wrote:
> Recompute the physical address for each per-CPU page in the CPU entry
> area, a recent commit inadvertantly modified cea_map_percpu_pages() such
> that every PTE is mapped to the physical address of the first page.
> 
> Fixes: 9fd429c28073 ("x86/kasan: Map shadow for percpu pages on demand")
> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
> Signed-off-by: Sean Christopherson <seanjc@google.com>

Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>