From: Ingo Molnar <mingo@kernel.org>
To: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Borislav Petkov <bp@alien8.de>,
Alexander Popov <alpopov@ptsecurity.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Andrey Konovalov <adech.fo@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@kernel.org>,
Alexander Kuleshov <kuleshovmail@gmail.com>,
Denys Vlasenko <dvlasenk@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Kees Cook <keescook@chromium.org>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 1/1] x86_64: fix KASan shadow region page tables
Date: Fri, 19 Jun 2015 16:00:51 +0200 [thread overview]
Message-ID: <20150619140051.GA18930@gmail.com> (raw)
In-Reply-To: <55841ACF.50302@samsung.com>
* Andrey Ryabinin <a.ryabinin@samsung.com> wrote:
> On 06/19/2015 03:06 PM, Borislav Petkov wrote:
> > On Fri, Jun 19, 2015 at 02:49:19PM +0300, Andrey Ryabinin wrote:
> >> I guess that AMD cpus is more strict (unlike Intel) about violation
> >> of reserved/unused bits in page table entries. Please, try with this
> >> patch.
> >
> > With that the guest boots.
> >
>
> Great! Thanks.
>
> > How do I check whether KASan actually works? I don't see any note in
> > dmesg or some file named "*kasan*" in sysfs...
> >
>
> kasan will print report in dmesg whant it will find anything.
It should also printk a one line message at bootup, so that people can be sure
they are running a KASan-enabled kernel.
> To make sure that it works you could try to load testing module (CONFIG_TEST_KASAN).
> This module has bugs that kasan should catch.
That's a way too obscure mechanism just to determine whether the right kernel
config was booted. Please add a printk(), ok?
Thanks,
Ingo
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next prev parent reply other threads:[~2015-06-19 14:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-18 7:36 [PATCH v6 1/1] x86_64: fix KASan shadow region page tables Alexander Popov
2015-06-18 9:08 ` Borislav Petkov
2015-06-18 12:22 ` Andrey Ryabinin
2015-06-18 14:55 ` Borislav Petkov
2015-06-18 16:05 ` Andrey Ryabinin
2015-06-18 16:38 ` Borislav Petkov
2015-06-19 11:49 ` Andrey Ryabinin
2015-06-19 12:06 ` Borislav Petkov
2015-06-19 13:36 ` Andrey Ryabinin
2015-06-19 14:00 ` Ingo Molnar [this message]
2015-06-19 14:06 ` Borislav Petkov
2015-06-19 14:16 ` Andrey Ryabinin
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