netdev - Re: [PATCH 1/2] io_uring: make sure openat/openat2 honor rlimit nofile

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]

Message-Id: <20200319.214308.1025834695282023924.davem@davemloft.net>
Date:   Thu, 19 Mar 2020 21:43:08 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     axboe@...nel.dk
Cc:     io-uring@...r.kernel.org, netdev@...r.kernel.org,
        dkadashev@...il.com
Subject: Re: [PATCH 1/2] io_uring: make sure openat/openat2 honor rlimit
 nofile

From: Jens Axboe <axboe@...nel.dk>
Date: Thu, 19 Mar 2020 20:22:15 -0600

> Dmitry reports that a test case shows that io_uring isn't honoring a
> modified rlimit nofile setting. get_unused_fd_flags() checks the task
> signal->rlimi[] for the limits. As this isn't easily inheritable,
> provide a __get_unused_fd_flags() that takes the value instead. Then we
> can grab it when the request is prepared (from the original task), and
> pass that in when we do the async part part of the open.
> 
> Reported-by: Dmitry Kadashev <dkadashev@...il.com>
> Signed-off-by: Jens Axboe <axboe@...nel.dk>

Acked-by: David S. Miller <davem@...emloft.net>