linux-kernel - Re: [PATCH v2 0/2] mshv: Allow mappings that overlap in uaddr

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]

Message-ID: <20251107181304.GB4041739@liuwe-devbox-debian-v2.local>
Date: Fri, 7 Nov 2025 18:13:04 +0000
From: Wei Liu <wei.liu@...nel.org>
To: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
Cc: linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
	mhklinux@...look.com, magnuskulke@...ux.microsoft.com,
	kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
	decui@...rosoft.com, longli@...rosoft.com,
	skinsburskii@...ux.microsoft.com, prapal@...ux.microsoft.com,
	mrathor@...ux.microsoft.com, muislam@...rosoft.com
Subject: Re: [PATCH v2 0/2] mshv: Allow mappings that overlap in uaddr

On Thu, Nov 06, 2025 at 02:13:29PM -0800, Nuno Das Neves wrote:
> Currently the MSHV driver rejects mappings that would overlap in
> userspace. Remove this limitation as it is overly restrictive and
> allowing overlap is useful for VMMs.
> 
> Before make this change, fix the region overlap checking logic
> which is broken.
> 
> ---
> Changes in v2:
> - Add a patch to fix the overlap checking [Michael Kelley]
> - Move deletion of mshv_partition_region_by_uaddr() to the fix patch
> 
> ---
> Magnus Kulke (1):
>   mshv: Allow mappings that overlap in uaddr
> 
> Nuno Das Neves (1):
>   mshv: Fix create memory region overlap check

Applied to hyperv-next. Thanks.

> 
>  drivers/hv/mshv_root_main.c | 27 +++++++--------------------
>  include/uapi/linux/mshv.h   |  2 +-
>  2 files changed, 8 insertions(+), 21 deletions(-)
> 
> -- 
> 2.34.1
>