From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D576C4332F for ; Thu, 10 Nov 2022 20:35:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230255AbiKJUfO (ORCPT ); Thu, 10 Nov 2022 15:35:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231881AbiKJUfK (ORCPT ); Thu, 10 Nov 2022 15:35:10 -0500 Received: from mail-pj1-x1049.google.com (mail-pj1-x1049.google.com [IPv6:2607:f8b0:4864:20::1049]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E253A51C0F for ; Thu, 10 Nov 2022 12:35:08 -0800 (PST) Received: by mail-pj1-x1049.google.com with SMTP id oo18-20020a17090b1c9200b0020bdba475afso4052961pjb.4 for ; Thu, 10 Nov 2022 12:35:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=ORwfmj6kJY3MPYNwljMh0Ojz+sLVhyTdNLlUMLv1/pk=; b=dPenHzAEbJW8kC8ElMo2seQwuBWhbPC+xdFHerkhEDaAFKmywZZmJt5EKYxFYx5PvA ZmSN46xKFXiQ+Pp97CdEflEmOOgwFrIBLmkwqYRhzHE6W0scPyPsk0g6pP92RC/Ms9wg woHe+rgbZW5FUymKr5zW6CoWWcEtiAQ3zG7XADhtXqsxKkXfPN6Thqvc4vg12tOaeb+Z wBHu6IfhDia8qZ3HVCY2+V7n3w8UE+GKuXGOmdst2gOndCJ3rWo9fi3pSCWN+QAHJRq4 ujCkQcGcl63h8ZV0ZSYMEHo4r5MMH8TrJED7BWIrVPMrWFIyW5MApHTDpEWqRIhumVS/ IGCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ORwfmj6kJY3MPYNwljMh0Ojz+sLVhyTdNLlUMLv1/pk=; b=uVIia9Ypxd0jvbeMe3hIxLaj7AnvRbu62OtrI1U3kMv8A99IaITsOiduphPUH6Ew9f 9B8HNx9Y1NbIqR2TRP2DFD0AhVDQ6DKBD4bjd+OLUpjFcGXVZnbc+p3KOKAyYFiU+X9K t3sFlWnJ8hUlebohSdQUG1lA5iRMiDvUyeVcXvGzET4f4J4PtVAfak7SrvcZwHSlFGS/ dZ81iWOOyRLfD2mhxjilKy9xWLZVaM3x1GWBpCvs8LRgmADquSgv1pz7u3T8lpzDaGK7 Mg/Dd87UqN4rlfhwNDBT8tSc8P0ypbf3l4NkqMyRHteD/BcAfN/ypehaJQCLujZVAhh2 uVxg== X-Gm-Message-State: ACrzQf1zoY1or6cM2uihAQLV5Ma0MG5PZJ2xcJhJqrcyKUfsw34poMDM ldU6Xvi8ACpgrlJS5CNq6Za9CH4NKKg= X-Google-Smtp-Source: AMsMyM5fLKb1rLHzXIfRwcSUTb4J0JSxCJOaAqeWcC8JblIxncIkbaH9LXt+i6VekSJ9dYeWY2bd3Jh2AcY= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a17:902:9894:b0:185:57b6:13c3 with SMTP id s20-20020a170902989400b0018557b613c3mr1968715plp.116.1668112508403; Thu, 10 Nov 2022 12:35:08 -0800 (PST) Reply-To: Sean Christopherson Date: Thu, 10 Nov 2022 20:35:00 +0000 In-Reply-To: <20221110203504.1985010-1-seanjc@google.com> Mime-Version: 1.0 References: <20221110203504.1985010-1-seanjc@google.com> X-Mailer: git-send-email 2.38.1.431.g37b22c650d-goog Message-ID: <20221110203504.1985010-2-seanjc@google.com> Subject: [PATCH v2 1/5] x86/mm: Recompute physical address for every page of per-CPU CEA mapping From: Sean Christopherson To: Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, Andrey Ryabinin Cc: "H. Peter Anvin" , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Sean Christopherson , syzbot+ffb4f000dc2872c93f62@syzkaller.appspotmail.com, syzbot+8cdd16fd5a6c0565e227@syzkaller.appspotmail.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Signed-off-by: Sean Christopherson --- arch/x86/mm/cpu_entry_area.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c index dff9001e5e12..d831aae94b41 100644 --- a/arch/x86/mm/cpu_entry_area.c +++ b/arch/x86/mm/cpu_entry_area.c @@ -97,7 +97,7 @@ cea_map_percpu_pages(void *cea_vaddr, void *ptr, int pages, pgprot_t prot) early_pfn_to_nid(PFN_DOWN(pa))); for ( ; pages; pages--, cea_vaddr+= PAGE_SIZE, ptr += PAGE_SIZE) - cea_set_pte(cea_vaddr, pa, prot); + cea_set_pte(cea_vaddr, per_cpu_ptr_to_phys(ptr), prot); } static void __init percpu_setup_debug_store(unsigned int cpu) -- 2.38.1.431.g37b22c650d-goog