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From: Oleg Nesterov <oleg@redhat.com>
To: Kees Cook <keescook@chromium.org>
Cc: Rik van Riel <riel@redhat.com>, Michal Hocko <mhocko@suse.com>,
	Stanislav Kozina <skozina@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: get_arg_page() && ptr_size accounting
Date: Mon, 10 Sep 2018 19:21:09 +0200	[thread overview]
Message-ID: <20180910172109.GB27005@redhat.com> (raw)
In-Reply-To: <CAGXu5jJ+aiJWL0G0Zpq2Df4ADEmpSBZHSTaUkzJiNbgg+B6x2Q@mail.gmail.com>

On 09/10, Kees Cook wrote:
>
> On Mon, Sep 10, 2018 at 9:41 AM, Kees Cook <keescook@chromium.org> wrote:
> > On Mon, Sep 10, 2018 at 5:29 AM, Oleg Nesterov <oleg@redhat.com> wrote:
> >> Hi Kees,
> >>
> >> I was thinking about backporting the commit 98da7d08850fb8bde
> >> ("fs/exec.c: account for argv/envp pointers"), but I am not sure
> >> I understand it...
>
> BTW, if you backport that, please get the rest associated with the
> various Stack Clash related weaknesses:

may be...

> da029c11e6b1 exec: Limit arg stack to at most 75% of _STK_LIM

and I have to admit that I do not understand this patch at all, the
changelog explains nothing.

Could you explain what this patch actually prevents from? Especially
now that we have stack_guard_gap?

Oleg.


  reply	other threads:[~2018-09-10 17:21 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-10 12:29 get_arg_page() && ptr_size accounting Oleg Nesterov
2018-09-10 16:41 ` Kees Cook
2018-09-10 16:45   ` Kees Cook
2018-09-10 17:21     ` Oleg Nesterov [this message]
2018-09-10 17:43       ` Oleg Nesterov
2018-09-11  4:30         ` Kees Cook
2018-09-11 15:29           ` Oleg Nesterov
2018-09-11  4:27       ` Kees Cook
2018-09-11 15:25         ` Oleg Nesterov
2018-09-10 17:18   ` Oleg Nesterov
2018-09-11  4:23     ` Kees Cook
2018-09-11 14:13       ` Oleg Nesterov
2018-09-11 19:06         ` Kees Cook
2018-09-12 12:27           ` Oleg Nesterov
2018-09-12 14:23             ` Oleg Nesterov
2018-09-12 20:42             ` Kees Cook

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