linux-kernel - Re: [PATCH v2 19/19] kasan: use stack_depot

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Message-ID: <CA+fCnZdGUGd7cAvWVj_Y77W5+CsjguBWB2mQX-Nx4MsYGbVpRw@mail.gmail.com>
Date:   Mon, 23 Oct 2023 18:17:51 +0200
From:   Andrey Konovalov <andreyknvl@...il.com>
To:     Alexander Potapenko <glider@...gle.com>
Cc:     andrey.konovalov@...ux.dev, Marco Elver <elver@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>, kasan-dev@...glegroups.com,
        Evgenii Stepanov <eugenis@...gle.com>,
        Oscar Salvador <osalvador@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: Re: [PATCH v2 19/19] kasan: use stack_depot_put for tag-based modes

On Mon, Oct 9, 2023 at 2:24 PM Alexander Potapenko <glider@...gle.com> wrote:
>
> On Wed, Sep 13, 2023 at 7:18 PM <andrey.konovalov@...ux.dev> wrote:
> >
> > From: Andrey Konovalov <andreyknvl@...gle.com>
> >
> > Make tag-based KASAN modes to evict stack traces from the stack depot
> "Make tag-based KASAN modes evict stack traces from the stack depot"
> (without "to")
>
> > Internally, pass STACK_DEPOT_FLAG_GET to stack_depot_save_flags (via
> > kasan_save_stack) to increment the refcount when saving a new entry
> > to stack ring and call stack_depot_put when removing an entry from
> > stack ring.
> >
> > Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
> Reviewed-by: Alexander Potapenko <glider@...gle.com>
>
> (but see the two other comments)
>
> > --- a/mm/kasan/report_tags.c
> > +++ b/mm/kasan/report_tags.c
> > @@ -7,6 +7,7 @@
> >  #include <linux/atomic.h>
> >
> >  #include "kasan.h"
> > +#include "../slab.h"
>
> Why?

This belongs to the previous patch, will fix in v3, thanks!