From: Florian Weimer <fw@deneb.enyo.de>
To: Mark Wielaard <mark@klomp.org>
Cc: libc-alpha@sourceware.org
Subject: Re: [PATCH 2/4] tst-pkey.c: Handle no permission to alloc memory protection keys
Date: Sun, 26 Jun 2022 23:40:12 +0200 [thread overview]
Message-ID: <87a69znlxf.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <87letjnmz6.fsf@mid.deneb.enyo.de> (Florian Weimer's message of "Sun, 26 Jun 2022 23:17:33 +0200")
* Florian Weimer:
> * Mark Wielaard:
>
>> pkey_alloc might fail with errno EPERM if there is no permission
>> to allocate memory protection keys. Use FAIL_UNSUPPORTED in that
>> case.
>> ---
>> sysdeps/unix/sysv/linux/tst-pkey.c | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/sysdeps/unix/sysv/linux/tst-pkey.c b/sysdeps/unix/sysv/linux/tst-pkey.c
>> index df51f695bc..48a20fa3e0 100644
>> --- a/sysdeps/unix/sysv/linux/tst-pkey.c
>> +++ b/sysdeps/unix/sysv/linux/tst-pkey.c
>> @@ -203,6 +203,9 @@ do_test (void)
>> FAIL_UNSUPPORTED
>> ("no keys available or kernel does not support memory"
>> " protection keys");
>> + if (errno == EPERM)
>> + FAIL_UNSUPPORTED
>> + ("no permission to alloc memory protection keys");
>> FAIL_EXIT1 ("pkey_alloc: %m");
>> }
>> TEST_COMPARE (pkey_get (keys[0]), 0);
>
> It's rather weird to restrict access to a hardening tool. Is this in
> a container, and is the container tool reasonably up to date? They
> should all have switchted to ENOSYS for reducing the system call
> profile.
I was thinking about this bug in particular:
systemd: Unknown system calls should produce ENOSYS under systemd-nspawn
<https://bugzilla.redhat.com/show_bug.cgi?id=2040247>
next prev parent reply other threads:[~2022-06-26 21:40 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-26 20:59 Handle running make check in a restricted environment Mark Wielaard
2022-06-26 20:59 ` [PATCH 1/4] time/tst-clock2.c: clock_settime CLOCK_MONOTONIC might return EPERM Mark Wielaard
2022-06-26 21:15 ` Florian Weimer
2022-06-27 9:35 ` Mark Wielaard
2022-06-26 20:59 ` [PATCH 2/4] tst-pkey.c: Handle no permission to alloc memory protection keys Mark Wielaard
2022-06-26 21:17 ` Florian Weimer
2022-06-26 21:40 ` Florian Weimer [this message]
2022-06-27 9:50 ` Mark Wielaard
2022-06-27 11:39 ` Florian Weimer
2022-06-27 14:08 ` Mark Wielaard
2022-06-26 20:59 ` [PATCH 3/4] tst-pidfd.c: Test is UNSUPPORTED without PTRACE_MODE_ATTACH_REALCREDS Mark Wielaard
2022-06-26 21:20 ` Florian Weimer
2022-06-27 10:01 ` Mark Wielaard
2022-06-27 11:14 ` Florian Weimer
2022-06-27 11:51 ` Christian Brauner
2022-06-27 14:17 ` Mark Wielaard
2022-06-27 14:21 ` Adhemerval Zanella
2022-06-27 14:25 ` Christian Brauner
2022-06-27 14:42 ` Florian Weimer
2022-06-27 14:57 ` Adhemerval Zanella
2022-06-27 15:08 ` Christian Brauner
2022-06-27 15:14 ` Adhemerval Zanella
2022-06-27 16:48 ` Mark Wielaard
2022-06-27 17:03 ` Adhemerval Zanella
2022-07-01 10:38 ` Mark Wielaard
2022-06-27 15:03 ` Christian Brauner
2022-06-27 14:23 ` Adhemerval Zanella
2022-06-27 16:36 ` Mark Wielaard
2022-06-26 20:59 ` [PATCH 4/4] tst-personality.c: Handle personality failing with errno EPERM Mark Wielaard
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=87a69znlxf.fsf@mid.deneb.enyo.de \
--to=fw@deneb.enyo.de \
--cc=libc-alpha@sourceware.org \
--cc=mark@klomp.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 read-only IMAP folder(s) and NNTP newsgroup(s).