From: Vasiliy Kulikov <segoon@openwall.com>
To: kernel-hardening@lists.openwall.com
Subject: Re: [kernel-hardening] [RFC] x86, mm: start mmap allocation for libs from low addresses
Date: Wed, 7 Sep 2011 13:55:08 +0400 [thread overview]
Message-ID: <20110907095508.GA16114@albatros> (raw)
In-Reply-To: <20110907094335.GA17834@openwall.com>
Solar,
On Wed, Sep 07, 2011 at 13:43 +0400, Solar Designer wrote:
> On Wed, Sep 07, 2011 at 01:34:11PM +0400, Vasiliy Kulikov wrote:
> > On Wed, Sep 07, 2011 at 13:30 +0400, Solar Designer wrote:
> > > What if mmap_min_addr set really low, or is even 0? I think we want to
> > > skip low addresses even if processes are permitted to use those.
> > > (Permitted does not mean encouraged.) So how about ASCII_ARMOR_MIN_ADDR
> > > 0x19000 (100 KB) when !CONFIG_VM86?
> >
> > Are you talking about safety with NULL pointer dereferencing?
>
> Yes.
OK, fully agree. But why 100 KB? Probably 0x10000 (64 KB)? It looks
nicer and not so magic.
--
Vasiliy
next prev parent reply other threads:[~2011-09-07 9:55 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-12 10:29 [RFC] x86, mm: start mmap allocation for libs from low addresses Vasiliy Kulikov
2011-08-12 10:29 ` [kernel-hardening] " Vasiliy Kulikov
2011-08-12 10:29 ` Vasiliy Kulikov
2011-08-12 10:58 ` [kernel-hardening] " Solar Designer
2011-08-12 11:05 ` Vasiliy Kulikov
2011-08-25 17:19 ` Vasiliy Kulikov
2011-08-25 17:39 ` Solar Designer
2011-09-02 18:29 ` Solar Designer
2011-09-03 11:18 ` Vasiliy Kulikov
2011-09-03 23:57 ` Solar Designer
2011-09-05 12:46 ` Vasiliy Kulikov
2011-09-06 5:05 ` Solar Designer
2011-09-07 9:09 ` Vasiliy Kulikov
2011-09-07 9:30 ` Solar Designer
2011-09-07 9:34 ` Vasiliy Kulikov
2011-09-07 9:43 ` Solar Designer
2011-09-07 9:55 ` Vasiliy Kulikov [this message]
2011-09-07 10:16 ` Solar Designer
2011-09-07 11:01 ` Vasiliy Kulikov
2011-09-02 23:34 ` Solar Designer
2011-09-03 12:12 ` Vasiliy Kulikov
2011-09-03 23:40 ` Solar Designer
2011-09-04 7:21 ` Vasiliy Kulikov
2011-08-12 23:19 ` H. Peter Anvin
2011-08-12 23:19 ` [kernel-hardening] " H. Peter Anvin
2011-08-12 23:19 ` H. Peter Anvin
2011-08-13 6:26 ` Vasiliy Kulikov
2011-08-13 6:26 ` [kernel-hardening] " Vasiliy Kulikov
2011-08-13 6:26 ` Vasiliy Kulikov
2011-08-16 9:05 ` Vasiliy Kulikov
2011-08-16 9:05 ` [kernel-hardening] " Vasiliy Kulikov
2011-08-16 9:05 ` Vasiliy Kulikov
2011-08-22 10:17 ` Vasiliy Kulikov
2011-08-22 10:17 ` [kernel-hardening] " Vasiliy Kulikov
2011-08-22 10:17 ` Vasiliy Kulikov
2011-08-22 17:24 ` H. Peter Anvin
2011-08-22 17:24 ` [kernel-hardening] " H. Peter Anvin
2011-08-22 17:24 ` H. Peter Anvin
2011-08-22 20:14 ` Vasiliy Kulikov
2011-08-22 20:14 ` [kernel-hardening] " Vasiliy Kulikov
2011-08-22 20:14 ` Vasiliy Kulikov
2011-08-22 20:17 ` H. Peter Anvin
2011-08-22 20:17 ` [kernel-hardening] " H. Peter Anvin
2011-08-22 20:17 ` H. Peter Anvin
2011-08-23 6:41 ` Vasiliy Kulikov
2011-08-23 6:41 ` [kernel-hardening] " Vasiliy Kulikov
2011-08-23 6:41 ` Vasiliy Kulikov
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