Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Mon, 18 Jun 2018 10:23:45 -0600
From: Jens Axboe <>
To: Al Viro <>
Cc:, Jann Horn <>,
 FUJITA Tomonori <>,
 "James E.J. Bottomley" <>,
 "Martin K. Petersen" <>,,,,,
Subject: Re: [PATCH] sg, bsg: mitigate read/write abuse, block uaccess in

On 6/18/18 10:16 AM, Al Viro wrote:
> On Mon, Jun 18, 2018 at 09:37:01AM -0600, Jens Axboe wrote:
>>> The folks responsible are no longer active in kernel development ***
>>> but as far as I know the async write(command), read(response) were
>>> added to bsg over 10 years ago as proof-of-concept and never properly
>>> worked in this async mode. The biggest design problem with it that I'm
>> It was born with that mode, but I don't think anyone ever really used it.
>> So it might feasible to simply yank it. That said, just doing a prune
>> mode at ->release() time doesn't seem like such a hard task.
> "prune mode" being...?

Basically what Jann posted, not doing any copy-back of data. Need to
verify if the bio unmapping is handled correctly, as some of those
will also copy when the end_io handling is invoked.

Jens Axboe

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.