linux-kernel - Re: [PATCH] io_uring: don't audit the capability check in io_uring

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 18 Jul 2023 14:16:42 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Ondrej Mosnacek <omosnace@...hat.com>
Cc:     Pavel Begunkov <asml.silence@...il.com>, io-uring@...r.kernel.org,
        linux-security-module@...r.kernel.org, selinux@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] io_uring: don't audit the capability check in
 io_uring_create()


On Tue, 18 Jul 2023 13:56:07 +0200, Ondrej Mosnacek wrote:
> The check being unconditional may lead to unwanted denials reported by
> LSMs when a process has the capability granted by DAC, but denied by an
> LSM. In the case of SELinux such denials are a problem, since they can't
> be effectively filtered out via the policy and when not silenced, they
> produce noise that may hide a true problem or an attack.
> 
> Since not having the capability merely means that the created io_uring
> context will be accounted against the current user's RLIMIT_MEMLOCK
> limit, we can disable auditing of denials for this check by using
> ns_capable_noaudit() instead of capable().
> 
> [...]

Applied, thanks!

[1/1] io_uring: don't audit the capability check in io_uring_create()
      commit: 6adc2272aaaf84f34b652cf77f770c6fcc4b8336

Best regards,
-- 
Jens Axboe