linux-kernel - Re: [PATCH] kasan, scs: collect stack traces from shadow stack

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Message-ID: <CA+fCnZc5Kz5AdttmbzC_Jj8=Q_yNz_iOoa9Jiu7trK8tVm+w4g@mail.gmail.com>
Date:   Sun, 20 Mar 2022 22:12:12 +0100
From:   Andrey Konovalov <andreyknvl@...il.com>
To:     Marco Elver <elver@...gle.com>
Cc:     andrey.konovalov@...ux.dev,
        Alexander Potapenko <glider@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Peter Collingbourne <pcc@...gle.com>,
        Evgenii Stepanov <eugenis@...gle.com>,
        Linux Memory Management List <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Florian Mayer <fmayer@...gle.com>
Subject: Re: [PATCH] kasan, scs: collect stack traces from shadow stack

On Mon, Mar 14, 2022 at 9:57 AM Marco Elver <elver@...gle.com> wrote:
>
> > Another option here is to instruct stack depot to get the stack from
> > the Shadow Call Stack. This would avoid copying the frames twice.
>
> Yes, I think a stack_depot_save_shadow() would be appropriate if it
> saves a copy.

Sounds good, will do in v2.