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:	Mon, 05 Jan 2015 12:42:08 -0800
From:	Andi Kleen <>
To:	Dave Hansen <>
Cc:	Andy Lutomirski <>,,,
	Thomas Gleixner <>
Subject: Re: [PATCH 3.19 3/3] x86, mpx: Change the MPX enable/disable API to arch_prctl

Dave Hansen <> writes:

> On 12/29/2014 04:52 PM, Andy Lutomirski wrote:
>> This has the benefit the it avoids cluttering prctl with more
>> arch-specific functionality.  The down side is that arch_prctl will
>> need to be wired up as a 32-bit syscall to add 32-bit support for
>> MPX.
> There is existing userspace out there which depends on the existing
> prctl() setup.  There isn't a _lot_ and it might still be able to be
> changed easily, but this isn't a given.
> I'll check in with the folks doing the gcc (runtime) part of this next
> week and see what they think.

It'll be quite messy for 32bit because they would need to use syscall(),
as glibc won't have a arch_prctl stub.


-- -- Speaking for myself only
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists