Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 25 Jun 2019 13:08:07 -0700
From: Kees Cook <>
To: Florian Weimer <>
	Andy Lutomirski <>,
	Carlos O'Donell <>
Subject: Re: Detecting the availability of VSYSCALL

On Tue, Jun 25, 2019 at 05:15:27PM +0200, Florian Weimer wrote:
> Should we try mapping something at the magic address (without MAP_FIXED)
> and see if we get back a different address?  Something in the auxiliary
> vector would work for us, too, but nothing seems to exists there
> unfortunately.

It seems like mmap() won't even work because it's in the high memory
area. I can't map something a page under the vsyscall page either, so I
can't distinguish it with mmap, mprotect, madvise, or msync. :(

Kees Cook

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.