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From: Al Viro <viro@zeniv.linux.org.uk>
To: Pavel Begunkov <asml.silence@gmail.com>
Cc: linux-fsdevel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
	io-uring@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/2] iter revert problems
Date: Mon, 9 Aug 2021 15:52:39 +0000	[thread overview]
Message-ID: <YRFPR25scNRYaRzW@zeniv-ca.linux.org.uk> (raw)
In-Reply-To: <cover.1628509745.git.asml.silence@gmail.com>

On Mon, Aug 09, 2021 at 12:52:35PM +0100, Pavel Begunkov wrote:
> For the bug description see 2/2. As mentioned there the current problems
> is because of generic_write_checks(), but there was also a similar case
> fixed in 5.12, which should have been triggerable by normal
> write(2)/read(2) and others.
> 
> It may be better to enforce reexpands as a long term solution, but for
> now this patchset is quickier and easier to backport.

	Umm...  Won't that screw the cases where we *are* doing proper
reexpands?  AFAICS, with your patches that flag doesn't go away once
it had been set...

  parent reply	other threads:[~2021-08-09 15:54 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-09 11:52 Pavel Begunkov
2021-08-09 11:52 ` [PATCH 1/2] iov_iter: mark truncated iters Pavel Begunkov
2021-08-09 11:52 ` [PATCH 2/2] io_uring: don't retry with truncated iter Pavel Begunkov
2021-08-09 15:52 ` Al Viro [this message]
2021-08-09 18:56   ` [PATCH 0/2] iter revert problems Pavel Begunkov
2021-08-10  8:47   ` David Laight

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