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c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=vRyAuwdRnLChBCBVFGTKtTcLQ1KujUMWRxgegUE/csw=; b=fJQtRrDIp0vpqUVqnBNiIpw5sZMxA+Zc5GG8L5G2fBcgEgrJCk8fSYFNDYg+OjIgCy EIPsfZc9pH2YnkPdd91cL/7oV9T8kL8uq8J1NUmCYZGz6+gkB+Qm2yC6Z7vnSGGBlS+K M2JIyUiv/aHpULbl5a2Ac7rmm5UZKfBIpbKsBCY9VMq1wYhS4pGm63cRG6gL4UqFbG2V fvvZqI61pcqZPEiD8W2pDtbK2BMgIZ+lCku8javIAFj7j49VfD2zHXJk8H5H4v5QfQdf n0oM3PGK4fRmFQzwS4+b9jbLEUW/nxIcKXRPBP/r6GJkHQ6fRBPVbNenw9miJ2/WuWl9 NpXA== X-Gm-Message-State: AOAM530Wzcu3Ru2iFUdr8h+4AvI/S+d5DNVA3Un90nt51kcGoy7cGoas 9mOS85CCqxG8i7susyecA9Y7LepaoymyxljgjwbGhw== X-Google-Smtp-Source: ABdhPJxNlfRr+d27x7ds3kYfz4Vaet62rX3/WapVLgoXO9ea4Taf/i/gwJ+XXy7eFkysWRMoTyt8gfP91CUOFe7vd9U= X-Received: by 2002:a37:bf04:: with SMTP id p4mr26719528qkf.326.1605109991955; Wed, 11 Nov 2020 07:53:11 -0800 (PST) MIME-Version: 1.0 References: <67c17dafa28036b628234c8f1d88368af374449c.1605046192.git.andreyknvl@google.com> In-Reply-To: <67c17dafa28036b628234c8f1d88368af374449c.1605046192.git.andreyknvl@google.com> From: Alexander Potapenko Date: Wed, 11 Nov 2020 16:52:59 +0100 Message-ID: Subject: Re: [PATCH v9 24/44] kasan, arm64: don't allow SW_TAGS with ARM64_MTE To: Andrey Konovalov Cc: Catalin Marinas , Will Deacon , Vincenzo Frascino , Dmitry Vyukov , Andrey Ryabinin , Marco Elver , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , Andrew Morton , kasan-dev , Linux ARM , Linux Memory Management List , LKML Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000009, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Nov 10, 2020 at 11:12 PM 'Andrey Konovalov' via kasan-dev wrote: > > Software tag-based KASAN provides its own tag checking machinery that > can conflict with MTE. Don't allow enabling software tag-based KASAN > when MTE is enabled. > > Signed-off-by: Andrey Konovalov > Signed-off-by: Vincenzo Frascino > Reviewed-by: Catalin Marinas Reviewed-by: Alexander Potapenko > --- > Change-Id: Icd29bd0c6b1d3d7a0ee3d50c20490f404d34fc97 > --- > arch/arm64/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 1515f6f153a0..25ead11074bf 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -134,7 +134,7 @@ config ARM64 > select HAVE_ARCH_JUMP_LABEL > select HAVE_ARCH_JUMP_LABEL_RELATIVE > select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48) > - select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN > + select HAVE_ARCH_KASAN_SW_TAGS if (HAVE_ARCH_KASAN && !ARM64_MTE) > select HAVE_ARCH_KGDB > select HAVE_ARCH_MMAP_RND_BITS > select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT > -- > 2.29.2.222.g5d2a92d10f8-goog > > -- > You received this message because you are subscribed to the Google Groups= "kasan-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an= email to kasan-dev+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgi= d/kasan-dev/67c17dafa28036b628234c8f1d88368af374449c.1605046192.git.andreyk= nvl%40google.com. --=20 Alexander Potapenko Software Engineer Google Germany GmbH Erika-Mann-Stra=C3=9Fe, 33 80636 M=C3=BCnchen Gesch=C3=A4ftsf=C3=BChrer: Paul Manicle, Halimah DeLaine Prado Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg