From: Florian Weimer <fweimer@redhat.com>
To: Jeff Xu <jeffxu@google.com>
Cc: "Mickaël Salaün" <mic@digikod.net>,
"Al Viro" <viro@zeniv.linux.org.uk>,
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"Xiaoming Ni" <nixiaoming@huawei.com>,
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kernel-hardening@lists.openwall.com, linux-api@vger.kernel.org,
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linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org
Subject: Re: [RFC PATCH v19 1/5] exec: Add a new AT_CHECK flag to execveat(2)
Date: Mon, 08 Jul 2024 19:33:03 +0200 [thread overview]
Message-ID: <87r0c3dc1c.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <CALmYWFvkUnevm=npBeaZVkK_PXm=A8MjgxFXkASnERxoMyhYBg@mail.gmail.com> (Jeff Xu's message of "Mon, 8 Jul 2024 09:40:45 -0700")
* Jeff Xu:
> On Mon, Jul 8, 2024 at 9:26 AM Florian Weimer <fweimer@redhat.com> wrote:
>>
>> * Jeff Xu:
>>
>> > Will dynamic linkers use the execveat(AT_CHECK) to check shared
>> > libraries too ? or just the main executable itself.
>>
>> I expect that dynamic linkers will have to do this for everything they
>> map.
> Then all the objects (.so, .sh, etc.) will go through the check from
> execveat's main to security_bprm_creds_for_exec(), some of them might
> be specific for the main executable ?
If we want to avoid that, we could have an agreed-upon error code which
the LSM can signal that it'll never fail AT_CHECK checks, so we only
have to perform the extra system call once.
Thanks,
Florian
next prev parent reply other threads:[~2024-07-08 17:33 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-04 19:01 [RFC PATCH v19 0/5] Script execution control (was O_MAYEXEC) Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 1/5] exec: Add a new AT_CHECK flag to execveat(2) Mickaël Salaün
2024-07-05 0:04 ` Kees Cook
2024-07-05 17:53 ` Mickaël Salaün
2024-07-08 19:38 ` Kees Cook
2024-07-05 18:03 ` Florian Weimer
2024-07-06 14:55 ` Mickaël Salaün
2024-07-06 15:32 ` Florian Weimer
2024-07-08 8:56 ` Mickaël Salaün
2024-07-08 16:37 ` [PATCH] binfmt_elf: Fail execution of shared objects with ELIBEXEC (was: Re: [RFC PATCH v19 1/5] exec: Add a new AT_CHECK flag to execveat(2)) Florian Weimer
2024-07-08 17:34 ` [PATCH] binfmt_elf: Fail execution of shared objects with ELIBEXEC Eric W. Biederman
2024-07-08 17:59 ` Florian Weimer
2024-07-10 10:05 ` [PATCH] binfmt_elf: Fail execution of shared objects with ELIBEXEC (was: Re: [RFC PATCH v19 1/5] exec: Add a new AT_CHECK flag to execveat(2)) Mickaël Salaün
2024-07-08 16:08 ` [RFC PATCH v19 1/5] exec: Add a new AT_CHECK flag to execveat(2) Jeff Xu
2024-07-08 16:25 ` Florian Weimer
2024-07-08 16:40 ` Jeff Xu
2024-07-08 17:05 ` Mickaël Salaün
2024-07-08 17:33 ` Florian Weimer [this message]
2024-07-08 17:52 ` Jeff Xu
2024-07-09 9:18 ` Mickaël Salaün
2024-07-09 10:05 ` Florian Weimer
2024-07-09 20:42 ` Mickaël Salaün
2024-07-09 18:57 ` Jeff Xu
2024-07-09 20:41 ` Mickaël Salaün
2024-07-06 8:52 ` Andy Lutomirski
2024-07-07 9:01 ` Mickaël Salaün
2024-07-17 6:33 ` Jeff Xu
2024-07-17 8:26 ` Steve Dower
2024-07-17 10:00 ` Mickaël Salaün
2024-07-18 1:02 ` Andy Lutomirski
2024-07-18 12:22 ` Mickaël Salaün
2024-07-20 1:59 ` Andy Lutomirski
2024-07-20 11:43 ` Jarkko Sakkinen
2024-07-23 13:16 ` Mickaël Salaün
2024-07-23 13:16 ` Mickaël Salaün
2024-07-18 1:51 ` Jeff Xu
2024-07-18 12:23 ` Mickaël Salaün
2024-07-18 22:54 ` Jeff Xu
2024-07-17 10:01 ` Mickaël Salaün
2024-07-18 2:08 ` Jeff Xu
2024-07-18 12:24 ` Mickaël Salaün
2024-07-18 13:03 ` James Bottomley
2024-07-18 15:35 ` Mickaël Salaün
2024-07-19 1:29 ` Jeff Xu
2024-07-19 8:44 ` Mickaël Salaün
2024-07-19 14:16 ` Jeff Xu
2024-07-19 15:04 ` Mickaël Salaün
2024-07-19 15:27 ` Jeff Xu
2024-07-23 13:15 ` Mickaël Salaün
2024-08-05 18:35 ` Jeff Xu
2024-08-09 8:45 ` Mickaël Salaün
2024-08-09 16:15 ` Jeff Xu
2024-07-19 15:12 ` Jeff Xu
2024-07-19 15:31 ` Mickaël Salaün
2024-07-19 17:36 ` Jeff Xu
2024-07-23 13:15 ` Mickaël Salaün
2024-07-18 14:46 ` enh
2024-07-18 15:35 ` Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 2/5] security: Add new SHOULD_EXEC_CHECK and SHOULD_EXEC_RESTRICT securebits Mickaël Salaün
2024-07-05 0:18 ` Kees Cook
2024-07-05 17:54 ` Mickaël Salaün
2024-07-05 21:44 ` Kees Cook
2024-07-05 22:22 ` Jarkko Sakkinen
2024-07-06 14:56 ` Mickaël Salaün
2024-07-06 17:28 ` Jarkko Sakkinen
2024-07-06 14:56 ` Mickaël Salaün
2024-07-18 14:16 ` Roberto Sassu
2024-07-18 16:20 ` Mickaël Salaün
2024-07-08 16:17 ` Jeff Xu
2024-07-08 17:53 ` Jeff Xu
2024-07-08 18:48 ` Mickaël Salaün
2024-07-08 21:15 ` Jeff Xu
2024-07-08 21:25 ` Steve Dower
2024-07-08 22:07 ` Jeff Xu
2024-07-09 20:42 ` Mickaël Salaün
2024-07-09 21:57 ` Jeff Xu
2024-07-10 9:58 ` Mickaël Salaün
2024-07-10 16:26 ` Kees Cook
2024-07-11 8:57 ` Mickaël Salaün
2024-07-16 15:02 ` Jeff Xu
2024-07-16 15:10 ` Steve Dower
2024-07-16 15:15 ` Mickaël Salaün
2024-07-16 15:18 ` Jeff Xu
2024-07-10 16:32 ` Steve Dower
2024-07-20 2:06 ` Andy Lutomirski
2024-07-23 13:15 ` Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 3/5] selftests/exec: Add tests for AT_CHECK and related securebits Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 4/5] selftests/landlock: Add tests for execveat + AT_CHECK Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 5/5] samples/should-exec: Add set-should-exec Mickaël Salaün
2024-07-08 19:40 ` Mimi Zohar
2024-07-09 20:42 ` Mickaël Salaün
2024-07-08 20:35 ` [RFC PATCH v19 0/5] Script execution control (was O_MAYEXEC) Mimi Zohar
2024-07-09 20:43 ` Mickaël Salaün
2024-07-16 15:57 ` Roberto Sassu
2024-07-16 16:12 ` James Bottomley
2024-07-16 17:29 ` Boris Lukashev
2024-07-16 17:47 ` Mickaël Salaün
2024-07-17 17:59 ` Boris Lukashev
2024-07-18 13:00 ` Mickaël Salaün
2024-07-16 17:31 ` Mickaël Salaün
2024-07-18 16:21 ` Mickaël Salaün
2024-07-15 20:16 ` Jonathan Corbet
2024-07-16 7:13 ` Mickaël Salaün
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