linux-kernel - RE: [PATCH] Fix io_read() and io_write() when io_import

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Message-ID: <3d5daf51252846cb851bf37d18842c4c@AcuMS.aculab.com>
Date:   Tue, 4 Feb 2020 14:05:12 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Jens Axboe' <axboe@...nel.dk>
CC:     LKML <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] Fix io_read() and io_write() when io_import_fixed() is
 used.

From: Jens Axboe
> Sent: 04 February 2020 14:01
> On 2/4/20 4:20 AM, David Laight wrote:
> > io_import_fixed() returns 0 on success so io_import_iovec() may
> > not return the length of the transfer.
> >
> > Instead always use the value from iov_iter_count()
> > (Which is called at the same place.)
> >
> > Fixes 9d93a3f5a (modded by 491381ce0) and 9e645e110.
> 
> What kernel is this against? This shouldn't be an issue
> in anything newer than 5.3-stable.

Sources are 5.4.0-rc7.
So not entirely 'the latest'.
I didn't update late in the 5.5 cycle and won't until
we get to rc4 (or so).

	David

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