Re: open_by_handle_at: mount_fd opened with O_PATH

[BOUGET Quentin <quentin.bouget@xxxxxx>]

On 16/12/2019 13:28, Amir Goldstein wrote:
> On Mon, Dec 16, 2019 at 11:39 AM <quentin.bouget@xxxxxx> wrote:
> > Hello,
> >
> > I recently noticed that the syscall open_by_handle_at() automatically
> > fails if
> > its first argument is a file descriptor opened with O_PATH. I looked at
> > the code
> > and saw no reason this could not be allowed. Attached to this mail are a
> > a reproducer and the patch I came up with.
> >
> > I am not quite familiar with the kernel's way of processing patches. Any
> > pointer
> > or advice on this matter is very welcome.
> See similar patch by Miklos to do the same for f*xattr() syscalls that
> looks simpler:
> https://lore.kernel.org/linux-fsdevel/20191128155940.17530-8-mszeredi@xxxxxxxxxx/
>
> Al, any objections to making this change?
>
> Thanks,
> Amir.

Much simpler, indeed (tested it, seems to work).

Thanks,
Quentin