From: "H. Peter Anvin" <hpa@zytor.com>
To: Indan Zupancic <indan@nul.nu>
Cc: Will Drewry <wad@chromium.org>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com,
netdev@vger.kernel.org, x86@kernel.org, arnd@arndb.de,
davem@davemloft.net, mingo@redhat.com, oleg@redhat.com,
peterz@infradead.org, rdunlap@xenotime.net,
mcgrathr@chromium.org, tglx@linutronix.de, luto@mit.edu,
eparis@redhat.com, serge.hallyn@canonical.com, djm@mindrot.org,
scarybeasts@gmail.com, pmoore@redhat.com,
akpm@linux-foundation.org, corbet@lwn.net,
eric.dumazet@gmail.com, markus@chromium.org,
coreyb@linux.vnet.ibm.com, keescook@chromium.org
Subject: Re: [PATCH v12 06/13] seccomp: add system call filtering using BPF
Date: Thu, 01 Mar 2012 21:52:59 -0800 [thread overview]
Message-ID: <4F50603B.7040505@zytor.com> (raw)
In-Reply-To: <a6fdbe9d1daf6864589c9affc7048965.squirrel@webmail.greenhost.nl>
On 03/01/2012 09:45 PM, Indan Zupancic wrote:
>
>> + * @nr: the system call number
>> + * @arch: indicates system call convention as an AUDIT_ARCH_* value
>> + * as defined in <linux/audit.h>.
>> + * @instruction_pointer: at the time of the system call.
>
> If the vDSO is used this will always be the same, so what good is this?
> I haven't gotten an answer to this yet.
>
And if it isn't, or you're on an architecture which doesn't use the vdso
as the launching point, it's not. You seem to be unable to look outside
your own particular use cases, but it is very likely that the same
oddball cases which do mixed-mode programming are ones for which this
kind of filtering facility would be extremely useful -- Pin is a great
example.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2012-03-02 5:52 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-29 23:53 [PATCH v12 01/13] sk_run_filter: add support for custom load_pointer Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 02/13] net/compat.c,linux/filter.h: share compat_sock_fprog Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 03/13] seccomp: kill the seccomp_t typedef Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 04/13] asm/syscall.h: add syscall_get_arch Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 05/13] arch/x86: add syscall_get_arch to syscall.h Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 06/13] seccomp: add system call filtering using BPF Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-03-02 5:45 ` Indan Zupancic
2012-03-02 5:45 ` Indan Zupancic
2012-03-02 5:52 ` H. Peter Anvin [this message]
2012-03-02 5:52 ` H. Peter Anvin
2012-03-02 6:43 ` Indan Zupancic
2012-03-02 6:43 ` Indan Zupancic
2012-03-02 6:55 ` H. Peter Anvin
2012-03-02 6:55 ` H. Peter Anvin
2012-03-02 8:12 ` Indan Zupancic
2012-03-02 8:12 ` Indan Zupancic
2012-03-02 18:44 ` [kernel-hardening] " Will Drewry
2012-03-02 18:44 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 07/13] seccomp: add SECCOMP_RET_ERRNO Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-03-02 18:24 ` Serge E. Hallyn
2012-03-02 18:24 ` Serge E. Hallyn
2012-03-05 21:03 ` Will Drewry
2012-03-05 21:03 ` Will Drewry
2012-03-05 21:13 ` Serge Hallyn
2012-03-05 21:13 ` Serge Hallyn
2012-02-29 23:53 ` [PATCH v12 08/13] signal, x86: add SIGSYS info and make it synchronous Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 09/13] seccomp: Add SECCOMP_RET_TRAP Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 10/13] ptrace,seccomp: Add PTRACE_SECCOMP support Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 11/13] x86: Enable HAVE_ARCH_SECCOMP_FILTER Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 12/13] Documentation: prctl/seccomp_filter Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-02-29 23:53 ` [PATCH v12 13/13] seccomp: remove duplicated failure logging Will Drewry
2012-02-29 23:53 ` Will Drewry
2012-03-01 23:37 ` [PATCH v12 01/13] sk_run_filter: add support for custom load_pointer Kees Cook
2012-03-01 23:37 ` Kees Cook
2012-03-02 0:05 ` H. Peter Anvin
2012-03-02 0:05 ` H. Peter Anvin
2012-03-02 0:22 ` Andrew Lutomirski
2012-03-02 0:47 ` Stephen Rothwell
2012-03-02 0:47 ` Stephen Rothwell
2012-03-02 0:57 ` Kees Cook
2012-03-02 1:19 ` Andrew Morton
2012-03-02 1:19 ` Andrew Morton
2012-03-02 2:39 ` Will Drewry
2012-03-02 2:39 ` Will Drewry
2012-03-02 4:04 ` Indan Zupancic
2012-03-02 4:04 ` Indan Zupancic
2012-03-02 5:03 ` Stephen Rothwell
2012-03-02 5:03 ` Stephen Rothwell
2012-03-02 5:26 ` Kees Cook
2012-03-02 5:26 ` Kees Cook
2012-03-02 1:48 ` Andrew Lutomirski
2012-03-02 3:10 ` Stephen Rothwell
2012-03-02 3:41 ` Will Drewry
2012-03-02 3:41 ` Will Drewry
2012-03-02 3:57 ` Stephen Rothwell
2012-03-02 3:57 ` Stephen Rothwell
2012-03-02 0:47 ` Eric Dumazet
2012-03-02 10:40 ` Indan Zupancic
2012-03-02 10:40 ` Indan Zupancic
2012-03-02 18:47 ` Will Drewry
2012-03-02 18:47 ` Will Drewry
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