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From: Greg KH <gregkh@linuxfoundation.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-nvdimm <linux-nvdimm@lists.01.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH] uio: fix is_source param for check_copy_size() in copy_to_iter_mcsafe()
Date: Wed, 12 Sep 2018 23:57:59 +0200	[thread overview]
Message-ID: <20180912215759.GA3000@kroah.com> (raw)
In-Reply-To: <CAPcyv4j9CooFiUpJnQvp2tP26u_Sys4AP4JmGtNBZf5R5ug8xg@mail.gmail.com>

On Wed, Sep 12, 2018 at 02:51:53PM -0700, Dan Williams wrote:
> On Wed, Sep 12, 2018 at 12:48 AM, Greg KH <gregkh@linuxfoundation.org> wrote:
> > On Wed, Sep 05, 2018 at 01:31:40PM -0700, Dave Jiang wrote:
> >> copy_to_iter_mcsafe() is passing in the is_source parameter as "false"
> >> to check_copy_size(). This is different than what copy_to_iter() does.
> >> Also, the addr parameter passed to check_copy_size() is the source so
> >> therefore we should be passing in "true" instead.
> >>
> >> Fixes: 8780356ef630 ("x86/asm/memcpy_mcsafe: Define copy_to_iter_mcsafe()")
> >> Cc: Fan Du <fan.du@intel.com>
> >> Reported-by: Wenwei Tao <wenwei.tww@alibaba-inc.com>
> >> Signed-off-by: Dave Jiang <dave.jiang@intel.com>
> >> Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
> >> Cc: stable <stable@vger.kernel.org>
> >> ---
> >>  include/linux/uio.h |    2 +-
> >
> > I am not the maintainer of this file, sorry, please work with the -mm
> > developers for this.
> 
> Likely this is get_maintainer.pl's fault:
> 
> $ ./scripts/get_maintainer.pl  -f include/linux/uio.h
> Greg Kroah-Hartman <gregkh@linuxfoundation.org> (maintainer:USERSPACE I/O (UIO))
> linux-kernel@vger.kernel.org (open list)
> 
> Maybe a MAINTAINERS update like the following is warranted, because I
> don't think -mm developers are right either, Al seems to be authority
> on iov_iter apis:
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index d870cb57c887..0018e19b4d8e 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -15344,13 +15344,18 @@ F:    arch/x86/um/
>  F:     fs/hostfs/
>  F:     fs/hppfs/
> 
> +USERSPACE ACCESS (uaccess, copy_{to,from}_iter)
> +M:     Alexander Viro <viro@zeniv.linux.org.uk>
> +S:     Maintained
> +F:     include/linux/uio*.h
> +F:     lib/iov_iter.c
> +
>  USERSPACE I/O (UIO)
>  M:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>  S:     Maintained
>  T:     git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
>  F:     Documentation/driver-api/uio-howto.rst
>  F:     drivers/uio/
> -F:     include/linux/uio*.h

Don't drop that line, uio_driver.h is what it should just say, right?

thanks,

greg k-h
_______________________________________________
Linux-nvdimm mailing list
Linux-nvdimm@lists.01.org
https://lists.01.org/mailman/listinfo/linux-nvdimm

WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <gregkh@linuxfoundation.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>,
	Vishal L Verma <vishal.l.verma@intel.com>,
	"Du, Fan" <fan.du@intel.com>,
	linux-nvdimm <linux-nvdimm@lists.01.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH] uio: fix is_source param for check_copy_size() in copy_to_iter_mcsafe()
Date: Wed, 12 Sep 2018 23:57:59 +0200	[thread overview]
Message-ID: <20180912215759.GA3000@kroah.com> (raw)
In-Reply-To: <CAPcyv4j9CooFiUpJnQvp2tP26u_Sys4AP4JmGtNBZf5R5ug8xg@mail.gmail.com>

On Wed, Sep 12, 2018 at 02:51:53PM -0700, Dan Williams wrote:
> On Wed, Sep 12, 2018 at 12:48 AM, Greg KH <gregkh@linuxfoundation.org> wrote:
> > On Wed, Sep 05, 2018 at 01:31:40PM -0700, Dave Jiang wrote:
> >> copy_to_iter_mcsafe() is passing in the is_source parameter as "false"
> >> to check_copy_size(). This is different than what copy_to_iter() does.
> >> Also, the addr parameter passed to check_copy_size() is the source so
> >> therefore we should be passing in "true" instead.
> >>
> >> Fixes: 8780356ef630 ("x86/asm/memcpy_mcsafe: Define copy_to_iter_mcsafe()")
> >> Cc: Fan Du <fan.du@intel.com>
> >> Reported-by: Wenwei Tao <wenwei.tww@alibaba-inc.com>
> >> Signed-off-by: Dave Jiang <dave.jiang@intel.com>
> >> Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
> >> Cc: stable <stable@vger.kernel.org>
> >> ---
> >>  include/linux/uio.h |    2 +-
> >
> > I am not the maintainer of this file, sorry, please work with the -mm
> > developers for this.
> 
> Likely this is get_maintainer.pl's fault:
> 
> $ ./scripts/get_maintainer.pl  -f include/linux/uio.h
> Greg Kroah-Hartman <gregkh@linuxfoundation.org> (maintainer:USERSPACE I/O (UIO))
> linux-kernel@vger.kernel.org (open list)
> 
> Maybe a MAINTAINERS update like the following is warranted, because I
> don't think -mm developers are right either, Al seems to be authority
> on iov_iter apis:
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index d870cb57c887..0018e19b4d8e 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -15344,13 +15344,18 @@ F:    arch/x86/um/
>  F:     fs/hostfs/
>  F:     fs/hppfs/
> 
> +USERSPACE ACCESS (uaccess, copy_{to,from}_iter)
> +M:     Alexander Viro <viro@zeniv.linux.org.uk>
> +S:     Maintained
> +F:     include/linux/uio*.h
> +F:     lib/iov_iter.c
> +
>  USERSPACE I/O (UIO)
>  M:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>  S:     Maintained
>  T:     git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
>  F:     Documentation/driver-api/uio-howto.rst
>  F:     drivers/uio/
> -F:     include/linux/uio*.h

Don't drop that line, uio_driver.h is what it should just say, right?

thanks,

greg k-h

  reply	other threads:[~2018-09-12 21:58 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-05 20:31 [PATCH] uio: fix is_source param for check_copy_size() in copy_to_iter_mcsafe() Dave Jiang
2018-09-05 20:31 ` Dave Jiang
2018-09-06 15:45 ` Dave Jiang
2018-09-06 15:45   ` Dave Jiang
2018-09-12  7:48 ` Greg KH
2018-09-12  7:48   ` Greg KH
2018-09-12 21:51   ` Dan Williams
2018-09-12 21:51     ` Dan Williams
2018-09-12 21:57     ` Greg KH [this message]
2018-09-12 21:57       ` Greg KH
2018-09-12 22:02       ` Dan Williams
2018-09-12 22:02         ` Dan Williams

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