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In-Reply-To: <b929882627e19a4a2d02c13788bd2d343f3e5573.1640036051.git.andreyknvl@google.com>
From:   Alexander Potapenko <glider@google.com>
Date:   Tue, 21 Dec 2021 10:23:02 +0100
Message-ID: <CAG_fn=W_6j08zxpgWeCX_uxN+Jqi93XYtQ_GY-Gjs_Ru2Hb2aQ@mail.gmail.com>
Subject: Re: [PATCH mm v4 16/39] kasan: define KASAN_VMALLOC_INVALID for SW_TAGS
To:     andrey.konovalov@linux.dev
Cc:     Marco Elver <elver@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andrey Konovalov <andreyknvl@gmail.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        kasan-dev <kasan-dev@googlegroups.com>,
        Linux Memory Management List <linux-mm@kvack.org>,
        Vincenzo Frascino <vincenzo.frascino@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Peter Collingbourne <pcc@google.com>,
        Evgenii Stepanov <eugenis@google.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Andrey Konovalov <andreyknvl@google.com>
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On Mon, Dec 20, 2021 at 11:00 PM <andrey.konovalov@linux.dev> wrote:
>
> From: Andrey Konovalov <andreyknvl@google.com>
>
> In preparation for adding vmalloc support to SW_TAGS KASAN,
> provide a KASAN_VMALLOC_INVALID definition for it.
>
> HW_TAGS KASAN won't be using this value, as it falls back onto
> page_alloc for poisoning freed vmalloc() memory.
>
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>