From: Catalin Marinas <catalin.marinas@arm.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will@kernel.org>, Breno Leitao <leitao@debian.org>,
Ard Biesheuvel <ardb@kernel.org>,
usamaarif642@gmail.com, rmikey@meta.com, andreyknvl@gmail.com,
kasan-dev@googlegroups.com, linux-efi@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kernel-team@meta.com
Subject: Re: [PATCH] arm64: efi: Fix KASAN false positive for EFI runtime stack
Date: Sun, 6 Jul 2025 19:45:04 -0500 [thread overview]
Message-ID: <aGsYkFnHEkn0dBsW@arm.com> (raw)
In-Reply-To: <aGfZwTCNO_10Ceng@J2N7QTR9R3>
On Fri, Jul 04, 2025 at 02:40:17PM +0100, Mark Rutland wrote:
> On Fri, Jul 04, 2025 at 02:33:35PM +0100, Will Deacon wrote:
> > I would actually like to select VMAP_STACK unconditionally for arm64.
> > Historically, we were held back waiting for all the various KASAN modes
> > to support vmalloc properly, but I _think_ that's fixed now...
> >
> > The VMAP_STACK dependency is:
> >
> > depends on !KASAN || KASAN_HW_TAGS || KASAN_VMALLOC
> >
> > and in arm64 we have:
> >
> > select KASAN_VMALLOC if KASAN
> >
> > so it should be fine to select it afaict.
> >
> > Any reason not to do that?
>
> Not that I am aware of.
>
> I'm also in favour of unconditionally selecting VMAP_STACK.
So am I.
--
Catalin
next prev parent reply other threads:[~2025-07-07 0:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-24 12:55 [PATCH] arm64: efi: Fix KASAN false positive for EFI runtime stack Breno Leitao
2025-07-03 16:35 ` Catalin Marinas
2025-07-04 8:26 ` Ard Biesheuvel
2025-07-04 12:36 ` Breno Leitao
2025-07-04 13:33 ` Will Deacon
2025-07-04 13:37 ` Ard Biesheuvel
2025-07-04 13:40 ` Mark Rutland
2025-07-07 0:45 ` Catalin Marinas [this message]
2025-07-07 16:08 ` Breno Leitao
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