linux-kernel - Re: [PATCH mm] kasan: stop leaking stack trace handles

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Date: Wed, 27 Dec 2023 22:42:40 +0100
From: Andrey Konovalov <andreyknvl@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: kernel test robot <lkp@...el.com>, andrey.konovalov@...ux.dev, 
	Marco Elver <elver@...gle.com>, oe-kbuild-all@...ts.linux.dev, 
	Linux Memory Management List <linux-mm@...ck.org>, Alexander Potapenko <glider@...gle.com>, 
	Dmitry Vyukov <dvyukov@...gle.com>, Andrey Ryabinin <ryabinin.a.a@...il.com>, kasan-dev@...glegroups.com, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH mm] kasan: stop leaking stack trace handles

On Wed, Dec 27, 2023 at 10:23 PM Andrew Morton
<akpm@...ux-foundation.org> wrote:
>
> Thanks, I added this fix:
>
> --- a/mm/kasan/generic.c~kasan-stop-leaking-stack-trace-handles-fix
> +++ a/mm/kasan/generic.c
> @@ -503,7 +503,7 @@ void kasan_init_object_meta(struct kmem_
>          */
>  }
>
> -void release_alloc_meta(struct kasan_alloc_meta *meta)
> +static void release_alloc_meta(struct kasan_alloc_meta *meta)
>  {
>         /* Evict the stack traces from stack depot. */
>         stack_depot_put(meta->alloc_track.stack);
> @@ -514,7 +514,7 @@ void release_alloc_meta(struct kasan_all
>         __memset(meta, 0, sizeof(*meta));
>  }
>
> -void release_free_meta(const void *object, struct kasan_free_meta *meta)
> +static void release_free_meta(const void *object, struct kasan_free_meta *meta)
>  {
>         /* Check if free meta is valid. */
>         if (*(u8 *)kasan_mem_to_shadow(object) != KASAN_SLAB_FREE_META)
> _
>

Could you mark them as "static inline" even?

I'll fix this if I end up sending v2.

Thank you, Andrew!