From: Richard Weinberger <richard@nod.at>
To: Pavel Machek <pavel@ucw.cz>, Jiri Kosina <jkosina@suse.cz>
Cc: Kees Cook <keescook@chromium.org>,
LKML <linux-kernel@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
David Rientjes <rientjes@google.com>,
Aaron Tomlin <atomlin@redhat.com>,
DaeSeok Youn <daeseok.youn@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
vdavydov@parallels.com, Rik van Riel <riel@redhat.com>,
Oleg Nesterov <oleg@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Al Viro <viro@zeniv.linux.org.uk>,
Andy Lutomirski <luto@amacapital.net>,
Brad Spengler <spender@grsecurity.net>
Subject: Re: [PATCH] [RFC] Deter exploit bruteforcing
Date: Sat, 03 Jan 2015 00:00:22 +0100 [thread overview]
Message-ID: <54A72306.2050908@nod.at> (raw)
In-Reply-To: <20150102225420.GC29018@amd>
Am 02.01.2015 um 23:54 schrieb Pavel Machek:
> On Fri 2015-01-02 23:49:52, Jiri Kosina wrote:
>> On Fri, 2 Jan 2015, Pavel Machek wrote:
>>
>>>> You also want to protect against binaries that are evil on purpose,
>>>> right?
>>>
>>> Umm. No. Not by default. We don't want to break crashme or trinity by
>>> default.
>>
>> I thought trinity is issuing syscalls directly (would make more sense than
>> going through glibc, wouldn't it?) ... haven't checked the source though.
>
> Patch in this thread wanted to insert delays into kernel on SIGSEGV
> processing. That's bad idea by default.
No. This is not what this patch does.
> But changing glibc to do sleep(30); abort(); instead of abort(); to
> slow down bruteforcing of canaries makes some kind of sense... and
> should be ok by default.
As I saidn only focusing one the specific stack canary case is not enough.
Thanks,
//richard
next prev parent reply other threads:[~2015-01-02 23:00 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-24 21:39 [PATCH] [RFC] Deter exploit bruteforcing Richard Weinberger
2014-12-30 18:40 ` Kees Cook
2014-12-30 18:49 ` Andy Lutomirski
2014-12-30 18:50 ` Richard Weinberger
2015-01-02 5:11 ` Pavel Machek
2015-01-02 11:00 ` Richard Weinberger
2015-01-02 19:46 ` Pavel Machek
2015-01-02 21:40 ` Richard Weinberger
2015-01-02 22:29 ` Pavel Machek
2015-01-02 22:32 ` Jiri Kosina
2015-01-02 22:46 ` Pavel Machek
2015-01-02 22:49 ` Jiri Kosina
2015-01-02 22:53 ` Jiri Kosina
2015-01-02 22:54 ` Pavel Machek
2015-01-02 23:00 ` Richard Weinberger [this message]
2015-01-02 23:08 ` Pavel Machek
2015-01-03 9:45 ` Richard Weinberger
2015-01-03 22:36 ` Pavel Machek
2015-01-03 22:44 ` Richard Weinberger
2015-01-03 23:01 ` Pavel Machek
2015-01-03 23:07 ` Richard Weinberger
2015-01-03 23:06 ` Andy Lutomirski
2015-01-03 23:19 ` Richard Weinberger
2015-01-05 22:56 ` Kees Cook
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