linux-kernel - Re: [RFC] efi: Add ACPI_MEMORY

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: <2024021718-dwindling-oval-8183@gregkh>
Date: Sat, 17 Feb 2024 08:49:32 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: Boqun Feng <boqun.feng@...il.com>
Cc: linux-arm-kernel@...r.kernel.org, stable@...r.kernel.org,
	Ard Biesheuvel <ardb@...nel.org>, linux-efi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC] efi: Add ACPI_MEMORY_NVS into the linear map

On Thu, Feb 15, 2024 at 02:51:06PM -0800, Boqun Feng wrote:
> Currently ACPI_MEMORY_NVS is omitted from the linear map, which causes
> a trouble with the following firmware memory region setup:
> 
> 	[..] efi:   0x0000dfd62000-0x0000dfd83fff [ACPI Reclaim|...]
> 	[..] efi:   0x0000dfd84000-0x0000dfd87fff [ACPI Mem NVS|...]
> 
> , on ARM64 with 64k page size, the whole 0x0000dfd80000-0x0000dfd8ffff
> range will be omitted from the the linear map due to 64k round-up. And
> a page fault happens when trying to access the ACPI_RECLAIM_MEMORY:
> 
> 	[...] Unable to handle kernel paging request at virtual address ffff0000dfd80000
> 
> To fix this, add ACPI_MEMORY_NVS into the linear map.
> 
> Signed-off-by: Boqun Feng <boqun.feng@...il.com>
> Cc: stable@...r.kernel.org # 5.15+

What commit id does this fix?  Can you include that as well?

thanks,

greg k-h