linux-kernel - Re: [PATCH v2 1/3] mm: softdirty: enable write notifications on VMAs after VM

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

Message-ID: <20140824005517.GB12184@google.com>
Date:	Sat, 23 Aug 2014 20:55:17 -0400
From:	Peter Feiner <pfeiner@...gle.com>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	Jamie Liu <jamieliu@...gle.com>,
	Hugh Dickins <hughd@...gle.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2 1/3] mm: softdirty: enable write notifications on VMAs
 after VM_SOFTDIRTY cleared

On Sun, Aug 24, 2014 at 02:50:58AM +0300, Kirill A. Shutemov wrote:
> One more case to consider: mprotect() which doesn't trigger successful
> vma_merge() will not set VM_SOFTDIRTY and will not enable write-protect on
> the vma.
> 
> It's probably better to take VM_SOFTDIRTY into account in
> vma_wants_writenotify() and re-think logic in other corners.

Merge or not, write notifications get disabled! I'll fix this too :-)

Peter
--
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/