linux-kernel - Re: RFC: fsyscall

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 10 Sep 2015 08:28:09 -0500
From:	"Serge E. Hallyn" <serge@...lyn.com>
To:	David Drysdale <drysdale@...gle.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andy Lutomirski <luto@...capital.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Serge E. Hallyn" <serge@...lyn.com>
Subject: Re: RFC: fsyscall

On Wed, Sep 09, 2015 at 06:27:06PM +0100, David Drysdale wrote:
> On Wed, Sep 9, 2015 at 1:25 AM, Eric W. Biederman <ebiederm@...ssion.com> wrote:
> > Andy Lutomirski <luto@...capital.net> writes:
> > > On Tue, Sep 8, 2015 at 4:07 PM, Eric W. Biederman <ebiederm@...ssion.com> wrote:
>
> (From this perspective, the limitation that seccomp-bpf programs only
> have access to syscall arguments by-value is actually a help -- the filter
> can't look into user memory, so can't be fooled by having memory
> contents changed underneath it.  Of course, if the eBPF stuff ever
> changes that we should watch out...)

Yup and I'm quite sure I've seen that raised as a reason to refuse
supporting exactly that.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/