From: Boyan Karatotev <boian4o1@gmail.com>
To: Dave Martin <Dave.Martin@arm.com>,
Boyan Karatotev <boyan.karatotev@arm.com>
Cc: Shuah Khan <shuah@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
amit.kachhap@arm.com, vincenzo.frascino@arm.com,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3/4] kselftests/arm64: add PAuth test for whether exec() changes keys
Date: Tue, 15 Sep 2020 16:18:28 +0100 [thread overview]
Message-ID: <4f38a974-d5a0-87e6-3db3-647e3cc32c0e@gmail.com> (raw)
In-Reply-To: <20200907102717.GM6642@arm.com>
On 07/09/2020 11:27 am, Dave Martin wrote:
> On Thu, Sep 03, 2020 at 11:20:25AM +0100, Boyan Karatotev wrote:
>> On 02/09/2020 18:00, Dave Martin wrote:
>>> On Fri, Aug 28, 2020 at 02:16:05PM +0100, Boyan Karatotev wrote:
>>>> +int exec_sign_all(struct signatures *signed_vals, size_t val)
>>>> +{
>>>
>>> Could popen(3) be used here?
>>>
>>> Fork-and-exec is notoriously fiddly, so it's preferable to use a library
>>> function to do it where applicable.I would love to, but the worker needs a bidirectional channel and popen
>> only gives a unidirectional stream.
>
> Ah, fair point.
>
> Would it help if you created an additional pipe before calling popen()?
>
> May not be worth it, though. For one thing, wiring that extra pipe to
> stdin or stdout in the child process would require some extra work...
Well, I probably could, but I doubt the result would be any better. I
agree that I'm not sure the effort is worth it and would rather keep it
the same.
next prev parent reply other threads:[~2020-09-15 16:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-28 13:16 [PATCH 0/4] kselftests/arm64: add PAuth tests Boyan Karatotev
2020-08-28 13:16 ` [PATCH 1/4] kselftests/arm64: add a basic Pointer Authentication test Boyan Karatotev
2020-08-28 14:28 ` Vincenzo Frascino
2020-08-31 8:05 ` Amit Kachhap
2020-09-02 16:49 ` Dave Martin
2020-09-03 10:12 ` Boyan Karatotev
2020-09-07 10:23 ` Dave Martin
2020-08-28 13:16 ` [PATCH 2/4] kselftests/arm64: add nop checks for PAuth tests Boyan Karatotev
2020-08-28 14:30 ` Vincenzo Frascino
2020-08-31 8:09 ` Amit Kachhap
2020-08-28 13:16 ` [PATCH 3/4] kselftests/arm64: add PAuth test for whether exec() changes keys Boyan Karatotev
2020-08-28 14:33 ` Vincenzo Frascino
2020-08-31 8:13 ` Amit Kachhap
2020-09-02 17:00 ` Dave Martin
2020-09-03 10:20 ` Boyan Karatotev
2020-09-07 10:27 ` Dave Martin
2020-09-15 15:18 ` Boyan Karatotev [this message]
2020-09-16 15:38 ` Dave Martin
2020-08-28 13:16 ` [PATCH 4/4] kselftests/arm64: add PAuth tests for single threaded consistency and key uniqueness Boyan Karatotev
2020-08-28 14:36 ` Vincenzo Frascino
2020-08-31 8:20 ` Amit Kachhap
2020-09-02 16:48 ` [PATCH 0/4] kselftests/arm64: add PAuth tests Dave Martin
2020-09-03 9:46 ` Boyan Karatotev
2020-09-07 10:29 ` Dave Martin
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=4f38a974-d5a0-87e6-3db3-647e3cc32c0e@gmail.com \
--to=boian4o1@gmail.com \
--cc=Dave.Martin@arm.com \
--cc=amit.kachhap@arm.com \
--cc=boyan.karatotev@arm.com \
--cc=catalin.marinas@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=shuah@kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).