linux-kernel - Re: [PATCH] mm: pagewalk: call pte_hole() for VM_PFNMAP during walk_page

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Thu, 22 Jan 2015 12:08:20 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Shiraz Hashim <shashim@...eaurora.org>
Cc:	linux-mm@...ck.org, oleg@...hat.com, gorcunov@...nvz.org,
	linux-kernel@...r.kernel.org, n-horiguchi@...jp.nec.com
Subject: Re: [PATCH] mm: pagewalk: call pte_hole() for VM_PFNMAP during
 walk_page_range

On Wed, 21 Jan 2015 11:43:13 +0530 Shiraz Hashim <shashim@...eaurora.org> wrote:

> walk_page_range silently skips vma having VM_PFNMAP set,
> which leads to undesirable behaviour at client end (who
> called walk_page_range). For example for pagemap_read,
> when no callbacks are called against VM_PFNMAP vma,
> pagemap_read may prepare pagemap data for next virtual
> address range at wrong index.

This changelog doesn't have enough information for me to be able to
work out whether a -stable backport is needed.  Please always describe
the user-visible effects of a bug.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/