From: Kees Cook <keescook@chromium.org>
To: David Gow <davidgow@google.com>
Cc: Brendan Higgins <brendanhiggins@google.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@vger.kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
KUnit Development <kunit-dev@googlegroups.com>
Subject: Re: [Linux-kernel-mentees] [RFC 0/3] kunit: add support to use modules
Date: Wed, 15 Jul 2020 19:41:41 -0700 [thread overview]
Message-ID: <202007151939.62EFE6F@keescook> (raw)
In-Reply-To: <CABVgOSkBAiMSMzCx62_CRo_0e2SGdvRWZ0dSC4t628YJBw-3Aw@mail.gmail.com>
On Wed, Jul 15, 2020 at 11:47:11AM +0800, David Gow wrote:
> - The inheriting of the mm stuff still means that
> copy_{from,to}_user() will only work if loaded as a module. This
> really needs to be documented. (Ideally, we'd find a way of having
> this work even for built-in tests, but I don't have any real ideas as
> to how that could be done).
I'd like to better understand this ... are there conditions where
vm_mmap() doesn't work? I thought this would either use current() (e.g.
how LKDTM uses it when getting triggered from debugfs), or use init_mm.
I'd really like to see the mm patch more well described/justified.
--
Kees Cook
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next prev parent reply other threads:[~2020-07-16 2:41 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-15 3:11 [Linux-kernel-mentees] [RFC 0/3] kunit: add support to use modules Vitor Massaru Iha
2020-07-15 3:11 ` [Linux-kernel-mentees] [RFC 1/3] kunit: tool: Add support root filesystem in kunit-tool Vitor Massaru Iha
2020-07-16 0:29 ` Brendan Higgins via Linux-kernel-mentees
2020-07-16 16:34 ` Vitor Massaru Iha
2020-07-15 3:11 ` [Linux-kernel-mentees] [RFC 2/3] lib: Allows to borrow mm in userspace on KUnit Vitor Massaru Iha
2020-07-16 0:37 ` Brendan Higgins via Linux-kernel-mentees
2020-07-16 16:35 ` Vitor Massaru Iha
2020-07-16 16:35 ` Vitor Massaru Iha
2020-07-15 3:11 ` [Linux-kernel-mentees] [RFC 3/3] lib: Convert test_user_copy to KUnit test Vitor Massaru Iha
2020-07-16 0:40 ` Brendan Higgins via Linux-kernel-mentees
2020-07-16 16:40 ` Vitor Massaru Iha
2020-07-16 2:34 ` Kees Cook
2020-07-16 16:42 ` Vitor Massaru Iha
2020-07-15 3:47 ` [Linux-kernel-mentees] [RFC 0/3] kunit: add support to use modules David Gow via Linux-kernel-mentees
2020-07-16 2:41 ` Kees Cook [this message]
2020-07-16 16:32 ` Vitor Massaru Iha
2020-07-16 16:21 ` Vitor Massaru Iha
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