From: Ilya Smith <blackzert@gmail.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: rth@twiddle.net, ink@jurassic.park.msu.ru, mattst88@gmail.com,
vgupta@synopsys.com, linux@armlinux.org.uk, tony.luck@intel.com,
fenghua.yu@intel.com, jhogan@kernel.org, ralf@linux-mips.org,
jejb@parisc-linux.org, Helge Deller <deller@gmx.de>,
benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au,
schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com,
ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net,
tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
x86@kernel.org, nyc@holomorphy.com, viro@zeniv.linux.org.uk,
arnd@arndb.de, gregkh@linuxfoundation.org,
deepa.kernel@gmail.com, Michal Hocko <mhocko@suse.com>,
hughd@google.com, kstewart@linuxfoundation.org,
pombredanne@nexb.com, akpm@linux-foundation.org,
steve.capper@arm.com, punit.agrawal@arm.com, paul.burton@m
Subject: Re: [RFC PATCH v2 0/2] Randomization of address chosen by mmap.
Date: Fri, 30 Mar 2018 12:07:58 +0300 [thread overview]
Message-ID: <95EECC28-7349-4FB4-88BF-26E4CF087A0B@gmail.com> (raw)
In-Reply-To: <20180330075508.GA21798@amd>
Hi
> On 30 Mar 2018, at 10:55, Pavel Machek <pavel@ucw.cz> wrote:
>
> Hi!
>
>> Current implementation doesn't randomize address returned by mmap.
>> All the entropy ends with choosing mmap_base_addr at the process
>> creation. After that mmap build very predictable layout of address
>> space. It allows to bypass ASLR in many cases. This patch make
>> randomization of address on any mmap call.
>
> How will this interact with people debugging their application, and
> getting different behaviours based on memory layout?
>
> strace, strace again, get different results?
>
Honestly I’m confused about your question. If the only one way for debugging
application is to use predictable mmap behaviour, then something went wrong in
this live and we should stop using computers at all.
Thanks,
Ilya
next prev parent reply other threads:[~2018-03-30 9:07 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1521736598-12812-1-git-send-email-blackzert@gmail.com>
[not found] ` <1521736598-12812-2-git-send-email-blackzert@gmail.com>
2018-03-22 20:53 ` [RFC PATCH v2 1/2] Randomization of address chosen by mmap Andrew Morton
2018-03-23 17:43 ` Ilya Smith
[not found] ` <1521736598-12812-3-git-send-email-blackzert@gmail.com>
2018-03-22 20:54 ` [RFC PATCH v2 2/2] Architecture defined limit on memory region random shift Andrew Morton
2018-03-23 17:48 ` Ilya Smith
2018-03-23 17:49 ` Ilya Smith
2018-03-22 20:57 ` [RFC PATCH v2 0/2] Randomization of address chosen by mmap Andrew Morton
2018-03-23 17:25 ` Ilya Smith
2018-03-23 12:48 ` Matthew Wilcox
2018-03-23 17:55 ` Ilya Smith
2018-03-26 8:46 ` Michal Hocko
2018-03-26 19:45 ` Ilya Smith
2018-03-27 7:24 ` Michal Hocko
2018-03-27 13:51 ` Ilya Smith
2018-03-27 14:38 ` Michal Hocko
2018-03-28 18:47 ` Ilya Smith
2018-03-27 22:16 ` Theodore Y. Ts'o
2018-03-28 18:48 ` Ilya Smith
2018-03-27 22:53 ` Kees Cook
2018-03-27 23:49 ` Matthew Wilcox
2018-03-27 23:57 ` Kees Cook
2018-03-28 0:00 ` Rich Felker
2018-03-28 21:07 ` Luck, Tony
2018-04-03 0:11 ` Ilya Smith
2018-03-28 21:07 ` Ilya Smith
2018-03-23 18:00 ` Rich Felker
2018-03-23 19:06 ` Matthew Wilcox
2018-03-23 19:16 ` Rich Felker
2018-03-23 19:29 ` Matthew Wilcox
2018-03-23 19:35 ` Rich Felker
2018-03-28 4:50 ` Rob Landley
2018-03-30 7:55 ` Pavel Machek
2018-03-30 9:07 ` Ilya Smith [this message]
2018-03-30 9:57 ` Pavel Machek
2018-03-30 11:10 ` Ilya Smith
2018-03-30 13:33 ` Rich Felker
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