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  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, 10 Aug 2021 13:55:11 -0400
From:   Konrad Rzeszutek Wilk <>
To:     Christoph Hellwig <>
Cc:     Maurizio Lombardi <>,,,,,,,,,
Subject: Re: [PATCH V3] iscsi_ibft: fix crash due to KASLR physical memory

On Tue, Aug 10, 2021 at 06:00:24PM +0100, Christoph Hellwig wrote:
> > Fix this bug by saving the address of the physical location
> > of the ibft; later the driver will use isa_bus_to_virt() to get
> > the correct virtual address.
> That sound rather broken.  Why not save the physical address in
> find_ibft_region and then later ioremap that when a virtual address is
> needed like all other code accessing magic I/O memory?

That is kind of what he does. The physical address is saved as a global
static variable and also the physical address is memreserved. Then
later on the physical address is used to create the virtual address.

Or are you thinking of making the find_ibft_region reserve the physical
address, and _cache_ the physical address so there is no global
variable ?

Powered by blists - more mailing lists