Re: [PATCH] fs/remap: constrain dedupe of EOF blocks

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To: ansgar.loesser@xxxxxxxxxxxxxxxxxxx
Subject: Re: [PATCH] fs/remap: constrain dedupe of EOF blocks
From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxx>
Date: Wed, 13 Jul 2022 10:26:43 -0700
Cc: Dave Chinner <david@xxxxxxxxxxxxx>, "Darrick J. Wong" <djwong@xxxxxxxxxx>, Josef Bacik <josef@xxxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Amir Goldstein <amir73il@xxxxxxxxx>, Mark Fasheh <mark@xxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Miklos Szeredi <mszeredi@xxxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, linux-fsdevel <linux-fsdevel@xxxxxxxxxxxxxxx>, Security Officers <security@xxxxxxxxxx>, Max Schlecht <max.schlecht@xxxxxxxxxxxxxxxxxxxxxxx>, Björn Scheuermann <scheuermann@xxxxxxxxxxxxxxxxxxx>
In-reply-to: <5548ef63-62f9-4f46-5793-03165ceccacc@tu-darmstadt.de>

On Wed, Jul 13, 2022 at 10:18 AM Ansgar Lößer
<ansgar.loesser@xxxxxxxxxxxxxxx> wrote:
>
> The proposed fix is to return the actual amount of bytes that got
> deduplicated, instead of the input length.

Ack, that patch seems obviously correct.

Mind sending it with a sign-off and a short commit message?

             Linus

Follow-Ups:
- [PATCH] vf/remap: return the amount of bytes actually deduplicated
  - From: Ansgar Lößer

References:
- Information Leak: FIDEDUPERANGE ioctl allows reading writeonly files
  - From: Ansgar Lößer
- Re: Information Leak: FIDEDUPERANGE ioctl allows reading writeonly files
  - From: Linus Torvalds
- Re: Information Leak: FIDEDUPERANGE ioctl allows reading writeonly files
  - From: Josef Bacik
- Re: Information Leak: FIDEDUPERANGE ioctl allows reading writeonly files
  - From: Linus Torvalds
- Re: Information Leak: FIDEDUPERANGE ioctl allows reading writeonly files
  - From: Josef Bacik
- Re: Information Leak: FIDEDUPERANGE ioctl allows reading writeonly files
  - From: Linus Torvalds
- Re: Information Leak: FIDEDUPERANGE ioctl allows reading writeonly files
  - From: Darrick J. Wong
- Re: Information Leak: FIDEDUPERANGE ioctl allows reading writeonly files
  - From: Linus Torvalds
- Re: Information Leak: FIDEDUPERANGE ioctl allows reading writeonly files
  - From: Dave Chinner
- [PATCH] fs/remap: constrain dedupe of EOF blocks
  - From: Dave Chinner
- Re: [PATCH] fs/remap: constrain dedupe of EOF blocks
  - From: Ansgar Lößer

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