From: Oleg Nesterov <oleg@redhat.com>
To: tip-bot for Michal Hocko <tipbot@zytor.com>
Cc: linux-tip-commits@vger.kernel.org, torvalds@linux-foundation.org,
mingo@kernel.org, hpa@zytor.com, jkosina@suse.cz,
mhocko@suse.com, tglx@linutronix.de, davej@codemonkey.org.uk,
peterz@infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [tip:x86/mm] x86/mmap, ASLR: Do not treat unlimited-stack tasks as legacy mmap
Date: Fri, 23 Jun 2017 16:54:41 +0200 [thread overview]
Message-ID: <20170623145441.GB9388@redhat.com> (raw)
In-Reply-To: <tip-86b110d2ae6365ce91cabd37588bc8611770421a@git.kernel.org>
On 06/23, tip-bot for Michal Hocko wrote:
>
> We added a heuristics to treat applications with RLIMIT_STACK configured
> to unlimited as legacy. This means:
To me this also means a minor security problem. The comment above
PER_CLEAR_ON_SETID says "must be cleared upon setuid or setgid exec",
but if you do "ulimit -s unlimited" before suid exec then
ADDR_COMPAT_LAYOUT set by security checks will be ignored.
> So let's try and remove this assumption - hopefully nothing breaks.
Agreed.
Oleg.
next prev parent reply other threads:[~2017-06-23 14:54 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-14 8:22 [RFC PATCH] mmap, aslr: do not enforce legacy mmap on unlimited stacks Michal Hocko
2017-06-23 8:46 ` Michal Hocko
2017-06-23 14:02 ` [tip:x86/mm] x86/mmap, ASLR: Do not treat unlimited-stack tasks as legacy mmap tip-bot for Michal Hocko
2017-06-23 14:54 ` Oleg Nesterov [this message]
2017-06-27 8:00 ` Jiri Kosina
2017-06-27 14:22 ` Oleg Nesterov
2017-06-28 9:40 ` Jiri Kosina
2017-06-23 20:35 ` Jiri Kosina
2017-06-24 6:43 ` tip-bot for Michal Hocko
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