Re: [PATCH] block/compat_ioctl: fix range check in BLKGETSIZE

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Apr 25, 2022 at 12:29:41PM -0700, Khazhy Kumykov wrote:
> On Thu, Apr 21, 2022 at 3:02 AM Greg KH <gregkh@linuxfoundation.org> wrote:
> >
> > On Tue, Apr 19, 2022 at 12:12:39PM -0700, Khazhismel Kumykov wrote:
> > > [ Upstream commit ccf16413e520164eb718cf8b22a30438da80ff23 ]
> > >
> > > kernel ulong and compat_ulong_t may not be same width. Use type directly
> > > to eliminate mismatches.
> > >
> > > This would result in truncation rather than EFBIG for 32bit mode for
> > > large disks.
> > >
> > > Reviewed-by: Bart Van Assche <bvanassche@acm.org>
> > > Signed-off-by: Khazhismel Kumykov <khazhy@google.com>
> > > Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
> > > Link: https://lore.kernel.org/r/20220414224056.2875681-1-khazhy@google.com
> > > Signed-off-by: Jens Axboe <axboe@kernel.dk>
> > > [compat_ioctl is it's own file in 5.4-stable and earlier]
> > > ---
> > >
> > > The original commit should apply to the newer stables
> >
> > It does not, it only applied to 5.17.y.
> >
> > Please provide working backports for all of the others.
> >
> > > this should apply
> > > to all the older stables.
> >
> > I'll wait for the 5.10.y and 5.15.y backport first before applying this
> > one.
> I double checked and the above patch applied to 4.9-5.4 for me

All now queued up, thanks.

greg k-h