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

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Message-ID: <bd164f90-f464-6c40-cb0c-9fd6e1ca98da@kernel.dk>
Date:   Tue, 4 Feb 2020 07:01:04 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Fix io_read() and io_write() when io_import_fixed() is
 used.

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.

-- 
Jens Axboe