linux-kernel - Re: [GIT PULL] SCSI fixes for 4.18-rc3

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Message-ID: <CAG48ez0h4c7z+a6Dj-94Wb4-HdWM1YbrBd44oyBEiQyu8NhCKA@mail.gmail.com>
Date:   Mon, 16 Jul 2018 18:20:35 +0200
From:   Jann Horn <jannh@...gle.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     James Bottomley <James.Bottomley@...senpartnership.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-scsi@...r.kernel.org,
        kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] SCSI fixes for 4.18-rc3

On Tue, Jul 10, 2018 at 2:41 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> On Fri, Jul 6, 2018 at 10:22 PM James Bottomley
> <James.Bottomley@...senpartnership.com> wrote:
> >
> > We did discuss removing the r/w interface, but, as you say, it's been
> > around for ages so it's not clear what regressions would surface if we
> > did.
>
> So since nobody else followed up on this, the attached patch is what I
> was thinking of just committing.
>
> It removes the warnings from the access check, and just puts them
> (unconditionally) at the top of the read/write function instead.

Minor issue:

+ pr_err_once("process %d (%s) does direct read on /dev/sg",
+ task_tgid_vnr(current), current->comm);
[...]
+ pr_err_once("process %d (%s) does direct write on /dev/sg",
+ task_tgid_vnr(current), current->comm);

printk wants a newline at the end of the message, otherwise the
message hangs until the next message is printed.