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Message-ID: <699fe0a2c2331af0d45a3516d9422d5ed5b59a99.camel@intel.com>
Date: Wed, 14 Aug 2019 09:20:21 -0700
From: Yu-cheng Yu <yu-cheng.yu@...el.com>
To: Dave Hansen <dave.hansen@...el.com>, x86@...nel.org,
"H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
linux-doc@...r.kernel.org, linux-mm@...ck.org,
linux-arch@...r.kernel.org, linux-api@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>,
Andy Lutomirski <luto@...capital.net>,
Balbir Singh <bsingharora@...il.com>,
Borislav Petkov <bp@...en8.de>,
Cyrill Gorcunov <gorcunov@...il.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Eugene Syromiatnikov <esyr@...hat.com>,
Florian Weimer <fweimer@...hat.com>,
"H.J. Lu" <hjl.tools@...il.com>, Jann Horn <jannh@...gle.com>,
Jonathan Corbet <corbet@....net>,
Kees Cook <keescook@...omium.org>,
Mike Kravetz <mike.kravetz@...cle.com>,
Nadav Amit <nadav.amit@...il.com>,
Oleg Nesterov <oleg@...hat.com>, Pavel Machek <pavel@....cz>,
Peter Zijlstra <peterz@...radead.org>,
Randy Dunlap <rdunlap@...radead.org>,
"Ravi V. Shankar" <ravi.v.shankar@...el.com>,
Vedvyas Shanbhogue <vedvyas.shanbhogue@...el.com>,
Dave Martin <Dave.Martin@....com>
Subject: Re: [PATCH v8 09/27] mm/mmap: Prevent Shadow Stack VMA merges
On Tue, 2019-08-13 at 15:34 -0700, Dave Hansen wrote:
> On 8/13/19 1:52 PM, Yu-cheng Yu wrote:
> > To prevent function call/return spills into the next shadow stack
> > area, do not merge shadow stack areas.
>
> How does this prevent call/return spills?
It does not. I will fix the description.
Yu-cheng
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