From: Stefan Metzmacher <[email protected]>
To: Pavel Begunkov <[email protected]>,
Jens Axboe <[email protected]>, Daurnimator <[email protected]>
Cc: [email protected]
Subject: Re: [PATCHSET 0/4] Add support for shared io-wq backends
Date: Tue, 28 Jan 2020 11:35:33 +0100 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
Hi Pavel,
>> That's good in order to make the behavior consistent again and prevents
>> potential random security problems.
>
> BTW, there also can be problems with registered resources. E.g. for
> buffers io_uring can get_user_pages() of one process, and then use the
> pages from another process by passing a buffer index. This is not as
> bad, however.
Yes, but that can only happen by intention, right?
And not randomly depending on the cache state. If the
application has confidential data in the registered buffers, files
then it should not share the ring fd with untrusted processes.
metze
next prev parent reply other threads:[~2020-01-28 10:35 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 23:16 [PATCHSET 0/4] Add support for shared io-wq backends Jens Axboe
2020-01-23 23:16 ` [PATCH 1/4] io-wq: make the io_wq ref counted Jens Axboe
2020-01-23 23:16 ` [PATCH 2/4] io-wq: add 'id' to io_wq Jens Axboe
2020-01-23 23:16 ` [PATCH 3/4] io-wq: allow lookup of existing io_wq with given id Jens Axboe
2020-01-24 9:54 ` Stefan Metzmacher
2020-01-24 16:41 ` Jens Axboe
2020-01-23 23:16 ` [PATCH 4/4] io_uring: add support for sharing kernel io-wq workqueue Jens Axboe
2020-01-24 9:51 ` [PATCHSET 0/4] Add support for shared io-wq backends Stefan Metzmacher
2020-01-24 16:43 ` Jens Axboe
2020-01-24 19:14 ` Stefan Metzmacher
2020-01-24 21:37 ` Jens Axboe
2020-01-24 20:34 ` Pavel Begunkov
2020-01-24 21:38 ` Jens Axboe
2020-01-26 1:51 ` Daurnimator
2020-01-26 15:11 ` Pavel Begunkov
2020-01-26 17:00 ` Jens Axboe
2020-01-27 13:29 ` Pavel Begunkov
2020-01-27 13:39 ` Jens Axboe
2020-01-27 14:07 ` Pavel Begunkov
2020-01-27 19:39 ` Pavel Begunkov
2020-01-27 19:45 ` Jens Axboe
2020-01-27 20:33 ` Jens Axboe
2020-01-27 21:45 ` Pavel Begunkov
2020-01-27 22:40 ` Jens Axboe
2020-01-27 23:00 ` Jens Axboe
2020-01-27 23:17 ` Pavel Begunkov
2020-01-27 23:23 ` Jens Axboe
2020-01-27 23:25 ` Pavel Begunkov
2020-01-27 23:38 ` Jens Axboe
2020-01-28 10:01 ` Stefan Metzmacher
2020-01-28 10:30 ` Pavel Begunkov
2020-01-28 10:35 ` Stefan Metzmacher [this message]
2020-01-28 10:51 ` Pavel Begunkov
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