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]
Date: Tue, 26 Mar 2024 12:32:23 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: "Margolin, Michael" <mrgolin@...zon.com>
Cc: Tao Liu <ltao@...hat.com>, Gal Pressman <gal.pressman@...ux.dev>,
	sleybo@...zon.com, leon@...nel.org, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: Re: Implementing .shutdown method for efa module

On Tue, Mar 26, 2024 at 02:34:45PM +0200, Margolin, Michael wrote:
> Hi Tao,
> 
> Thanks for bringing this up.
> 
> I've unsuccessfully tried to reproduce this kernel panic using production
> Red Hat 9.3 AMI (5.14.0-362.18.1.el9_3.aarch64).
> 
> Are there any related changes in the kernel you are testing?
> 
> Anyways we do need to handle shutdown properly, please let know if calling
> to efa_remove solves your issue.

efa_remove should not be used for shutdown..

If you have an iommu in your system (smmuv3 for this ARM64 case) then
drivers must implement a shutdown handler or you will risk data
corruption on ARM64 sytems during crash.

The shutdown handler must stop all DMA from the device.

If you don't have an iommu then the shutdown handler shouldn't be
critical.

Jason

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ