On Thu, 2020-11-26 at 11:10 +, Catalin Marinas wrote:
> Hi Miles,
>
> Could you please cc me and Andrey Konovalov on future versions of this
> patch (if any)?
>
> On Mon, 23 Nov 2020 at 08:47, Miles Chen wrote:
> > When we try to visit the pagemap of a tagged userspace pointer, we find
> >
On Tue, 2020-11-24 at 12:32 -0600, Eric W. Biederman wrote:
> Miles Chen writes:
>
> > When we try to visit the pagemap of a tagged userspace pointer, we find
> > that the start_vaddr is not correct because of the tag.
> > To fix it, we should untag the usespace pointers in pagemap_read().
> >
>
Hi Miles,
Could you please cc me and Andrey Konovalov on future versions of this
patch (if any)?
On Mon, 23 Nov 2020 at 08:47, Miles Chen wrote:
> When we try to visit the pagemap of a tagged userspace pointer, we find
> that the start_vaddr is not correct because of the tag.
> To fix it, we
sd_upstr...@mediatek.com
> Subject: RE: [RESEND PATCH v1] proc: use untagged_addr() for pagemap_read
> addresses
>
>
>
> > -Original Message-
> > From: Miles Chen [mailto:miles.c...@mediatek.com]
> > Sent: Thursday, November 26, 2020 8:49 PM
> >
rnel.org; linux-media...@lists.infradead.org;
> wsd_upstr...@mediatek.com
> Subject: RE: [RESEND PATCH v1] proc: use untagged_addr() for pagemap_read
> addresses
>
> On Thu, 2020-11-26 at 07:16 +, Song Bao Hua (Barry Song) wrote:
> >
> > > -Original Message-
> > >
inux-kernel@vger.kernel.org; linux-fsde...@vger.kernel.org;
> > linux-media...@lists.infradead.org; wsd_upstr...@mediatek.com; Miles
> > Chen
> > Subject: [RESEND PATCH v1] proc: use untagged_addr() for pagemap_read
> > addresses
> >
> > When we try to visit
upstr...@mediatek.com; Miles
> Chen
> Subject: [RESEND PATCH v1] proc: use untagged_addr() for pagemap_read
> addresses
>
> When we try to visit the pagemap of a tagged userspace pointer, we find
> that the start_vaddr is not correct because of the tag.
> To fix it, we should u
Miles Chen writes:
> When we try to visit the pagemap of a tagged userspace pointer, we find
> that the start_vaddr is not correct because of the tag.
> To fix it, we should untag the usespace pointers in pagemap_read().
>
> I tested with 5.10-rc4 and the issue remains.
>
> My test code is baed
When we try to visit the pagemap of a tagged userspace pointer, we find
that the start_vaddr is not correct because of the tag.
To fix it, we should untag the usespace pointers in pagemap_read().
I tested with 5.10-rc4 and the issue remains.
My test code is baed on [1]:
A userspace pointer
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