From: Christoph Hellwig <hch@lst.de>
To: Eric Biggers <ebiggers@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>,
axboe@kernel.dk, jaegeuk@kernel.org, chao@kernel.org,
ulf.hansson@linaro.org, Adrian Hunter <adrian.hunter@intel.com>,
Daeho Jeong <daehojeong@google.com>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mmc@vger.kernel.org
Subject: Re: security issue: data exposure when using block layer secure erase
Date: Fri, 18 Mar 2022 10:10:54 +0100 [thread overview]
Message-ID: <20220318091054.GA31758@lst.de> (raw)
In-Reply-To: <YjIm6f6pSX1CKeqb@gmail.com>
On Wed, Mar 16, 2022 at 06:05:29PM +0000, Eric Biggers wrote:
> __blkdev_issue_discard() can break up the region into multiple bios, but I don't
> see where it actually skips parts of the region. Can you explain more
> specifically where the problem is?
You're right. We used to skip misaligned parts, but that was actually
fixed two years ago.
prev parent reply other threads:[~2022-03-18 9:11 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-16 9:37 security issue: data exposure when using block layer secure erase Christoph Hellwig
2022-03-16 9:38 ` [PATCH, alternative 1] block: remove REQ_OP_SECURE_ERASE erase Christoph Hellwig
2022-03-16 9:38 ` [PATCH alternative 2] block: fix the REQ_OP_SECURE_ERASE handling to not leak erased data Christoph Hellwig
2022-03-17 9:44 ` Ulf Hansson
2022-03-18 9:11 ` Christoph Hellwig
2022-03-18 10:36 ` Ulf Hansson
2022-03-16 18:05 ` security issue: data exposure when using block layer secure erase Eric Biggers
2022-03-17 9:57 ` Joel Granados
2022-03-18 9:10 ` Christoph Hellwig [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220318091054.GA31758@lst.de \
--to=hch@lst.de \
--cc=adrian.hunter@intel.com \
--cc=axboe@kernel.dk \
--cc=chao@kernel.org \
--cc=daehojeong@google.com \
--cc=ebiggers@kernel.org \
--cc=jaegeuk@kernel.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mmc@vger.kernel.org \
--cc=ulf.hansson@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox