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

[Jann Horn]

On Tue, Jul 10, 2018 at 2:41 AM Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> On Fri, Jul 6, 2018 at 10:22 PM James Bottomley
> <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> 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.