From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f74.google.com (mail-wm1-f74.google.com [209.85.128.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 966E82036E9 for ; Thu, 4 Jun 2026 15:12:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780585938; cv=none; b=Z1PvhhoTyKe7vo8ugxUimbaMIlxT8jyHPF2llkeLTG8uBDDDDhG0FS7G6kKQC/iMl5oF5BARo3aP3oLb8X5CbgikbD04BBZKoDpi9f2VpuJgypMdtYL84wxnrKKQOOGc3xvLiJI1EsSPcPh58qySjk/qquiVf4F+sMN7tvdNhzE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780585938; c=relaxed/simple; bh=Fo5INQP9FUR4EpcbvRR5M6BR8a3lzbWGgMqMv5eOsVQ=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=dE0Uvb7oBaMi9XMAeE/NlEZqvkvAwUmMOxLGnPEblnvB1U5S2WvqMazPG/kQElfB/cV9iptJi+AwPthtC3gYYUqFMWhFfthT1dib7QQc3bsfsFT2nS29zB4pwFORl1Ry/oXS3oJhNm5RT4wL79piWTYbjw8kTztOj4Lbku9tsBE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--ardb.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=bj+GCjBS; arc=none smtp.client-ip=209.85.128.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--ardb.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="bj+GCjBS" Received: by mail-wm1-f74.google.com with SMTP id 5b1f17b1804b1-490b9cd54f3so7105125e9.2 for ; Thu, 04 Jun 2026 08:12:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780585936; x=1781190736; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=j/oZhJVx107l//gullK2VkJorHFGxa6Du/1X7jFvu9o=; b=bj+GCjBShVcurcci6tU50SkxOda0GwxnH/qV8PeB6h+sEq4wNUAoNMnTNCQW1/za0V nxWNX19u6eSm2VQ4NV3y08qCUPflsNZ6wbAgCzEXhC5kUXaM0fKae4VkG473CRZB9AZ0 +/94hfqBtPhWoaJi6L64XbOA1T1Ae9+ZGRyeVV2oMiG6y+FzLtVC2Jt35lFcnlUnvqm8 rrYVkT++FE6mPqiuLvjeIAd0rGdgVXgtgnMsbNk4y1I6yzGuL9v95tXZ4r4KgTcJucFY H8e1vexLQKCJThtaJhEym2JTqij9ksw+UO1tlbhxkPrBHdPwhKh5ljgVxtrlRc0tXczu ajKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780585936; x=1781190736; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=j/oZhJVx107l//gullK2VkJorHFGxa6Du/1X7jFvu9o=; b=hpl5Po3AymSQSF0r5XjYLXgIc60JJLatadpj4kRPhtISfuFwFpfw8HPY3+HsJdE19x jsZ12ySyDdWHfNrgC0GekwaKyt0rN132dXLaXJYJd545I8x1mlSwJAqFdQCUwdiglawE 1KXhoSI5hMx79je+dwl4CaERYELwfj5b530BnY/RqfAfU6+fNu6h+IKWqeoO2DnO29Zj /gfKGirh9zGBfYTHc7cgvBfPD3vUv0Qnr/yZiiBf7g6qb/Cg7IBI1lFPI6BRoEC37Rk1 ZKuq2DCpdCAR9hrOAJPy/Ka0DRzIhZQCTpUCC277ALlFi4tXmakz57dv1Lq1FGfmUiwU t86Q== X-Gm-Message-State: AOJu0YzZVji9OVpXDVldZRTI1LQWH35byTk+n8SMF/p4GuXQgB9yBmrz wGeWO1WCdFBv9e0wvn2L6RWqzTEKE2ESyD4ea8lw5DfR+adl+GlA6mtci2X498YH1rkwu6+FUw= = X-Received: from wrri18.prod.google.com ([2002:adf:fc12:0:b0:45e:f772:335c]) (user=ardb job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:8b30:b0:48f:e26a:1744 with SMTP id 5b1f17b1804b1-490b5eb4aeemr138962085e9.9.1780585935968; Thu, 04 Jun 2026 08:12:15 -0700 (PDT) Date: Thu, 4 Jun 2026 17:11:52 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Developer-Key: i=ardb@kernel.org; a=openpgp; fpr=F43D03328115A198C90016883D200E9CA6329909 X-Developer-Signature: v=1; a=openpgp-sha256; l=1585; i=ardb@kernel.org; h=from:subject; bh=wxu2qKrIqHRRqwxiQshadwjn/FVZ9lSy+5Qx4CfSQS4=; b=owGbwMvMwCVmkMcZplerG8N4Wi2JIUtx6g5e1p9FqYGFfB8zuza+XLx/VkbVy9LLulG5x65xz g6xXGzWUcrCIMbFICumyCIw+++7nacnStU6z5KFmcPKBDKEgYtTACZSdYmR4VnTgWV39aPSTA7k qp6KqbLw+/M39d6fp7udZ/u3sek2lDL8M+cSOvRz3tUVggsEzptHMkeJpCmJmS1z5839scvf8Ek pJwA= X-Mailer: git-send-email 2.54.0.1032.g2f8565e1d1-goog Message-ID: <20260604151151.150377-7-ardb+git@google.com> Subject: [PATCH v2 0/5] fixes for data/bss linear alias unmap series From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, will@kernel.org, catalin.marinas@arm.com, Ard Biesheuvel , Kevin Brodsky , Mark Brown , Marc Zyngier Content-Type: text/plain; charset="UTF-8" From: Ard Biesheuvel Fixes for the data/bss linear alias unmap series: - Fix KASAN related issue reported by Mark, by moving all KASAN page tables out of BSS [on arm64], not just the ones defined under arch/arm64 - Fix two issues spotted by Sashiko - Fix the CKI reported WARN() splat on BBML2_NOABORT systems that try to split block mappings too early. Changes since v1: - Split .bss..pgtbl changes off into separate patch - Take Catalin's suggestion on how to address MTE issue with the read-only zero page - Improved commit logs Cc: Kevin Brodsky Cc: Mark Brown Cc: Marc Zyngier Ard Biesheuvel (5): arm64: Rename page table BSS section to .bss..pgtbl kasan: Move generic KASAN page tables out of BSS too arm64: Avoid double evaluation of __ptep_get() KVM: arm64: Omit tag sync on stage-2 mappings of the zero page arm64: mm: Defer remap of linear alias of data/bss arch/arm64/include/asm/linkage.h | 2 ++ arch/arm64/include/asm/mmu.h | 2 -- arch/arm64/include/asm/pgtable.h | 4 ---- arch/arm64/kernel/vmlinux.lds.S | 8 ++++---- arch/arm64/kvm/mmu.c | 5 +++++ arch/arm64/mm/fixmap.c | 6 +++--- arch/arm64/mm/kasan_init.c | 2 +- arch/arm64/mm/mmu.c | 20 +++++++++++++------- include/linux/linkage.h | 4 ++++ mm/kasan/init.c | 10 +++++----- 10 files changed, 37 insertions(+), 26 deletions(-) base-commit: 63e0b6a5b6934d6a919d1c65ea185303200a1874 -- 2.54.0.1032.g2f8565e1d1-goog