From: Catalin Marinas <catalin.marinas@arm.com>
To: Andrey Konovalov <andreyknvl@google.com>
Cc: Linux ARM <linux-arm-kernel@lists.infradead.org>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
kasan-dev <kasan-dev@googlegroups.com>,
Will Deacon <will@kernel.org>
Subject: Re: arm64 KASAN_HW_TAGS panic on non-MTE hardware on 5.12-rc1
Date: Fri, 5 Mar 2021 17:52:43 +0000 [thread overview]
Message-ID: <20210305175243.GH23855@arm.com> (raw)
In-Reply-To: <20210305175124.GG23855@arm.com>
On Fri, Mar 05, 2021 at 05:51:26PM +0000, Catalin Marinas wrote:
> On Fri, Mar 05, 2021 at 06:27:45PM +0100, Andrey Konovalov wrote:
> > On Fri, Mar 5, 2021 at 6:11 PM Catalin Marinas <catalin.marinas@arm.com> wrote:
> > > Enabling CONFIG_KASAN_HW_TAGS and running the resulting kernel on
> > > non-MTE hardware panics with an undefined STG instruction from
> > > mte_set_mem_tag_range():
> > >
> > > ./scripts/faddr2line vmlinux kasan_unpoison_task_stack+0x18/0x40
> > > kasan_unpoison_task_stack+0x18/0x40:
> > > mte_set_mem_tag_range at arch/arm64/include/asm/mte-kasan.h:71
> > > (inlined by) mte_set_mem_tag_range at arch/arm64/include/asm/mte-kasan.h:56
> > > (inlined by) kasan_unpoison at mm/kasan/kasan.h:363
> > > (inlined by) kasan_unpoison_task_stack at mm/kasan/common.c:72
> >
> > This is weird. kasan_unpoison_task_stack() is only defined when
> > CONFIG_KASAN_STACK is enabled, which shouldn't be enablable for
> > HW_TAGS.
>
> CONFIG_KASAN=y
> # CONFIG_KASAN_GENERIC is not set
> CONFIG_KASAN_HW_TAGS=y
> CONFIG_KASAN_STACK=1
From Kconfig:
config KASAN_STACK
int
default 1 if KASAN_STACK_ENABLE || CC_IS_GCC
default 0
and I use gcc.
--
Catalin
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-03-05 17:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 17:11 arm64 KASAN_HW_TAGS panic on non-MTE hardware on 5.12-rc1 Catalin Marinas
2021-03-05 17:27 ` Andrey Konovalov
[not found] ` <20210305175124.GG23855@arm.com>
2021-03-05 17:52 ` Catalin Marinas [this message]
2021-03-05 18:36 ` Andrey Konovalov
2021-03-06 12:01 ` Catalin Marinas
2021-03-08 14:56 ` Andrey Konovalov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210305175243.GH23855@arm.com \
--to=catalin.marinas@arm.com \
--cc=andreyknvl@google.com \
--cc=kasan-dev@googlegroups.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=vincenzo.frascino@arm.com \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.