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:   Wed, 25 Jan 2017 11:47:47 +0100 (CET)
From:   Thomas Gleixner <>
To:     Dave Jiang <>
Subject: Re: [PATCH v7] x86: fix kaslr and memmap collision

On Wed, 11 Jan 2017, Dave Jiang wrote:

> CONFIG_RANDOMIZE_BASE relocates the kernel to a random base address.
> However it does not take into account the memmap= parameter passed in from
> the kernel cmdline. This results in the kernel sometimes being put in
> the middle of memmap. Teaching kaslr to not insert the kernel in
> memmap defined regions. We will support up to 4 memmap regions. Any
> additional regions will cause kaslr to disable. The mem_avoid set has
> been augmented to add up to 4 unusable regions of memmaps provided by the
> user to exclude those regions from the set of valid address range to insert
> the uncompressed kernel image. The nn@ss ranges will be skipped by the
> mem_avoid set since it indicates memory useable.
> Signed-off-by: Dave Jiang <>
> Acked-by: Kees Cook <>
> Acked-by: Baoquan He <>

Reviewed-by: Thomas Gleixner <>

Powered by blists - more mailing lists