bpf.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Kees Cook <keescook@chromium.org>
To: YiFei Zhu <zhuyifei1999@gmail.com>
Cc: containers@lists.linux-foundation.org,
	YiFei Zhu <yifeifz2@illinois.edu>,
	bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
	Aleksa Sarai <cyphar@cyphar.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Andy Lutomirski <luto@amacapital.net>,
	David Laight <David.Laight@aculab.com>,
	Dimitrios Skarlatos <dskarlat@cs.cmu.edu>,
	Giuseppe Scrivano <gscrivan@redhat.com>,
	Hubertus Franke <frankeh@us.ibm.com>,
	Jack Chen <jianyan2@illinois.edu>, Jann Horn <jannh@google.com>,
	Josep Torrellas <torrella@illinois.edu>,
	Tianyin Xu <tyxu@illinois.edu>,
	Tobin Feldman-Fitzthum <tobin@ibm.com>,
	Tycho Andersen <tycho@tycho.pizza>,
	Valentin Rothberg <vrothber@redhat.com>,
	Will Drewry <wad@chromium.org>
Subject: Re: [PATCH v4 seccomp 5/5] seccomp/cache: Report cache data through /proc/pid/seccomp_cache
Date: Fri, 9 Oct 2020 16:14:48 -0700	[thread overview]
Message-ID: <202010091613.B671C86@keescook> (raw)
In-Reply-To: <c2077b8a86c6d82d611007d81ce81d32f718ec59.1602263422.git.yifeifz2@illinois.edu>

On Fri, Oct 09, 2020 at 12:14:33PM -0500, YiFei Zhu wrote:
> From: YiFei Zhu <yifeifz2@illinois.edu>
> 
> Currently the kernel does not provide an infrastructure to translate
> architecture numbers to a human-readable name. Translating syscall
> numbers to syscall names is possible through FTRACE_SYSCALL
> infrastructure but it does not provide support for compat syscalls.
> 
> This will create a file for each PID as /proc/pid/seccomp_cache.
> The file will be empty when no seccomp filters are loaded, or be
> in the format of:
> <arch name> <decimal syscall number> <ALLOW | FILTER>
> where ALLOW means the cache is guaranteed to allow the syscall,
> and filter means the cache will pass the syscall to the BPF filter.
> 
> For the docker default profile on x86_64 it looks like:
> x86_64 0 ALLOW
> x86_64 1 ALLOW
> x86_64 2 ALLOW
> x86_64 3 ALLOW
> [...]
> x86_64 132 ALLOW
> x86_64 133 ALLOW
> x86_64 134 FILTER
> x86_64 135 FILTER
> x86_64 136 FILTER
> x86_64 137 ALLOW
> x86_64 138 ALLOW
> x86_64 139 FILTER
> x86_64 140 ALLOW
> x86_64 141 ALLOW
> [...]
> 
> This file is guarded by CONFIG_SECCOMP_CACHE_DEBUG with a default
> of N because I think certain users of seccomp might not want the
> application to know which syscalls are definitely usable. For
> the same reason, it is also guarded by CAP_SYS_ADMIN.
> 
> Suggested-by: Jann Horn <jannh@google.com>
> Link: https://lore.kernel.org/lkml/CAG48ez3Ofqp4crXGksLmZY6=fGrF_tWyUCg7PBkAetvbbOPeOA@mail.gmail.com/
> Signed-off-by: YiFei Zhu <yifeifz2@illinois.edu>
> ---
>  arch/Kconfig                   | 24 ++++++++++++++
>  arch/x86/Kconfig               |  1 +
>  arch/x86/include/asm/seccomp.h |  3 ++
>  fs/proc/base.c                 |  6 ++++
>  include/linux/seccomp.h        |  5 +++
>  kernel/seccomp.c               | 59 ++++++++++++++++++++++++++++++++++
>  6 files changed, 98 insertions(+)
> 
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 21a3675a7a3a..85239a974f04 100644
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -471,6 +471,15 @@ config HAVE_ARCH_SECCOMP_FILTER
>  	    results in the system call being skipped immediately.
>  	  - seccomp syscall wired up
>  
> +config HAVE_ARCH_SECCOMP_CACHE
> +	bool
> +	help
> +	  An arch should select this symbol if it provides all of these things:
> +	  - all the requirements for HAVE_ARCH_SECCOMP_FILTER
> +	  - SECCOMP_ARCH_NATIVE
> +	  - SECCOMP_ARCH_NATIVE_NR
> +	  - SECCOMP_ARCH_NATIVE_NAME
> +
> [...]
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 1ab22869a765..1a807f89ac77 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -150,6 +150,7 @@ config X86
>  	select HAVE_ARCH_COMPAT_MMAP_BASES	if MMU && COMPAT
>  	select HAVE_ARCH_PREL32_RELOCATIONS
>  	select HAVE_ARCH_SECCOMP_FILTER
> +	select HAVE_ARCH_SECCOMP_CACHE
>  	select HAVE_ARCH_THREAD_STRUCT_WHITELIST
>  	select HAVE_ARCH_STACKLEAK
>  	select HAVE_ARCH_TRACEHOOK

HAVE_ARCH_SECCOMP_CACHE isn't used any more. I think this was left over
from before.

-- 
Kees Cook

  parent reply	other threads:[~2020-10-09 23:15 UTC|newest]

Thread overview: 149+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-21  5:35 [RFC PATCH seccomp 0/2] seccomp: Add bitmap cache of arg-independent filter results that allow syscalls YiFei Zhu
2020-09-21  5:35 ` [RFC PATCH seccomp 1/2] seccomp/cache: Add "emulator" to check if filter is arg-dependent YiFei Zhu
2020-09-21 17:47   ` Jann Horn
2020-09-21 18:38     ` Jann Horn
2020-09-21 23:44     ` YiFei Zhu
2020-09-22  0:25       ` Jann Horn
2020-09-22  0:47         ` YiFei Zhu
2020-09-21  5:35 ` [RFC PATCH seccomp 2/2] seccomp/cache: Cache filter results that allow syscalls YiFei Zhu
2020-09-21 18:08   ` Jann Horn
2020-09-21 22:50     ` YiFei Zhu
2020-09-21 22:57       ` Jann Horn
2020-09-21 23:08         ` YiFei Zhu
2020-09-25  0:01   ` [PATCH v2 seccomp 2/6] asm/syscall.h: Add syscall_arches[] array Kees Cook
2020-09-25  0:15     ` Jann Horn
2020-09-25  0:18       ` Al Viro
2020-09-25  0:24         ` Jann Horn
2020-09-25  1:27     ` YiFei Zhu
2020-09-25  3:09       ` Kees Cook
2020-09-25  3:28         ` YiFei Zhu
2020-09-25 16:39           ` YiFei Zhu
2020-09-21  5:48 ` [RFC PATCH seccomp 0/2] seccomp: Add bitmap cache of arg-independent filter results that allow syscalls Sargun Dhillon
2020-09-21  7:13   ` YiFei Zhu
2020-09-21  8:30 ` Christian Brauner
2020-09-21  8:44   ` YiFei Zhu
2020-09-21 13:51 ` Tycho Andersen
2020-09-21 15:27   ` YiFei Zhu
2020-09-21 16:39     ` Tycho Andersen
2020-09-21 22:57       ` YiFei Zhu
2020-09-21 19:16 ` Jann Horn
     [not found]   ` <OF8837FC1A.5C0D4D64-ON852585EA.006B677F-852585EA.006BA663@notes.na.collabserv.com>
2020-09-21 19:45     ` Jann Horn
2020-09-23 19:26 ` Kees Cook
2020-09-23 22:54   ` YiFei Zhu
2020-09-24  6:52     ` Kees Cook
2020-09-24 12:06 ` [PATCH seccomp 0/6] " YiFei Zhu
2020-09-24 12:06   ` [PATCH seccomp 1/6] seccomp: Move config option SECCOMP to arch/Kconfig YiFei Zhu
2020-09-24 12:06     ` YiFei Zhu
2020-09-24 12:06   ` [PATCH seccomp 2/6] asm/syscall.h: Add syscall_arches[] array YiFei Zhu
2020-09-24 12:06   ` [PATCH seccomp 3/6] seccomp/cache: Add "emulator" to check if filter is arg-dependent YiFei Zhu
2020-09-24 12:06   ` [PATCH seccomp 4/6] seccomp/cache: Lookup syscall allowlist for fast path YiFei Zhu
2020-09-24 12:06   ` [PATCH seccomp 5/6] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-09-24 12:06   ` [PATCH seccomp 6/6] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-09-24 12:44   ` [PATCH v2 seccomp 0/6] seccomp: Add bitmap cache of arg-independent filter results that allow syscalls YiFei Zhu
2020-09-24 12:44     ` [PATCH v2 seccomp 1/6] seccomp: Move config option SECCOMP to arch/Kconfig YiFei Zhu
2020-09-24 19:11       ` Kees Cook
2020-10-27  9:52       ` Geert Uytterhoeven
2020-10-27 19:08         ` YiFei Zhu
2020-10-28  0:06         ` Kees Cook
2020-10-28  8:18           ` Geert Uytterhoeven
2020-10-28  9:34             ` Jann Horn
2020-09-24 12:44     ` [PATCH v2 seccomp 2/6] asm/syscall.h: Add syscall_arches[] array YiFei Zhu
2020-09-24 13:47       ` David Laight
2020-09-24 14:16         ` YiFei Zhu
2020-09-24 14:20           ` David Laight
2020-09-24 14:37             ` YiFei Zhu
2020-09-24 16:02               ` YiFei Zhu
2020-09-24 12:44     ` [PATCH v2 seccomp 3/6] seccomp/cache: Add "emulator" to check if filter is arg-dependent YiFei Zhu
2020-09-24 23:25       ` Kees Cook
2020-09-25  3:04         ` YiFei Zhu
2020-09-25 16:45           ` YiFei Zhu
2020-09-25 19:42             ` Kees Cook
2020-09-25 19:51               ` Andy Lutomirski
2020-09-25 20:37                 ` Kees Cook
2020-09-25 21:07                   ` Andy Lutomirski
2020-09-25 23:49                     ` Kees Cook
2020-09-26  0:34                       ` Andy Lutomirski
2020-09-26  1:23                     ` YiFei Zhu
2020-09-26  2:47                       ` Andy Lutomirski
2020-09-26  4:35                         ` Kees Cook
2020-09-24 12:44     ` [PATCH v2 seccomp 4/6] seccomp/cache: Lookup syscall allowlist for fast path YiFei Zhu
2020-09-24 23:46       ` Kees Cook
2020-09-25  1:55         ` YiFei Zhu
2020-09-24 12:44     ` [PATCH v2 seccomp 5/6] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-09-24 23:47       ` Kees Cook
2020-09-25  1:35         ` YiFei Zhu
2020-09-24 12:44     ` [PATCH v2 seccomp 6/6] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-09-24 23:56       ` Kees Cook
2020-09-25  3:11         ` YiFei Zhu
2020-09-25  3:26           ` Kees Cook
2020-09-30 15:19 ` [PATCH v3 seccomp 0/5] seccomp: Add bitmap cache of constant allow filter results YiFei Zhu
2020-09-30 15:19   ` [PATCH v3 seccomp 1/5] x86: Enable seccomp architecture tracking YiFei Zhu
2020-09-30 21:21     ` Kees Cook
2020-09-30 21:33       ` Jann Horn
2020-09-30 22:53         ` Kees Cook
2020-09-30 23:15           ` Jann Horn
2020-09-30 15:19   ` [PATCH v3 seccomp 2/5] seccomp/cache: Add "emulator" to check if filter is constant allow YiFei Zhu
2020-09-30 22:24     ` Jann Horn
2020-09-30 22:49       ` Kees Cook
2020-10-01 11:28       ` YiFei Zhu
2020-10-01 21:08         ` Jann Horn
2020-09-30 22:40     ` Kees Cook
2020-10-01 11:52       ` YiFei Zhu
2020-10-01 21:05         ` Kees Cook
2020-10-02 11:08           ` YiFei Zhu
2020-10-09  4:47     ` YiFei Zhu
2020-10-09  5:41       ` Kees Cook
2020-09-30 15:19   ` [PATCH v3 seccomp 3/5] seccomp/cache: Lookup syscall allowlist for fast path YiFei Zhu
2020-09-30 21:32     ` Kees Cook
2020-10-09  0:17       ` YiFei Zhu
2020-10-09  5:35         ` Kees Cook
2020-09-30 15:19   ` [PATCH v3 seccomp 4/5] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-09-30 15:19   ` [PATCH v3 seccomp 5/5] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-09-30 22:00     ` Jann Horn
2020-09-30 23:12       ` Kees Cook
2020-10-01 12:06       ` YiFei Zhu
2020-10-01 16:05         ` Jann Horn
2020-10-01 16:18           ` YiFei Zhu
2020-09-30 22:59     ` Kees Cook
2020-09-30 23:08       ` Jann Horn
2020-09-30 23:21         ` Kees Cook
2020-10-09 17:14   ` [PATCH v4 seccomp 0/5] seccomp: Add bitmap cache of constant allow filter results YiFei Zhu
2020-10-09 17:14     ` [PATCH v4 seccomp 1/5] seccomp/cache: Lookup syscall allowlist bitmap for fast path YiFei Zhu
2020-10-09 21:30       ` Jann Horn
2020-10-09 23:18       ` Kees Cook
2020-10-09 17:14     ` [PATCH v4 seccomp 2/5] seccomp/cache: Add "emulator" to check if filter is constant allow YiFei Zhu
2020-10-09 21:30       ` Jann Horn
2020-10-09 22:47         ` Kees Cook
2020-10-09 17:14     ` [PATCH v4 seccomp 3/5] x86: Enable seccomp architecture tracking YiFei Zhu
2020-10-09 17:25       ` Andy Lutomirski
2020-10-09 18:32         ` YiFei Zhu
2020-10-09 20:59           ` Andy Lutomirski
2020-10-09 17:14     ` [PATCH v4 seccomp 4/5] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-10-09 17:14     ` [PATCH v4 seccomp 5/5] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-10-09 21:45       ` Jann Horn
2020-10-09 23:14       ` Kees Cook [this message]
2020-10-10 13:26         ` YiFei Zhu
2020-10-12 22:57           ` Kees Cook
2020-10-13  0:31             ` YiFei Zhu
2020-10-22 20:52               ` YiFei Zhu
2020-10-22 22:32                 ` Kees Cook
2020-10-22 23:40                   ` YiFei Zhu
2020-10-24  2:51                     ` Kees Cook
2020-10-30 12:18                       ` YiFei Zhu
2020-11-03 13:00                         ` YiFei Zhu
2020-11-04  0:29                           ` Kees Cook
2020-11-04 11:40                             ` YiFei Zhu
2020-11-04 18:57                               ` Kees Cook
2020-10-11 15:47     ` [PATCH v5 seccomp 0/5]seccomp: Add bitmap cache of constant allow filter results YiFei Zhu
2020-10-11 15:47       ` [PATCH v5 seccomp 1/5] seccomp/cache: Lookup syscall allowlist bitmap for fast path YiFei Zhu
2020-10-12  6:42         ` Jann Horn
2020-10-11 15:47       ` [PATCH v5 seccomp 2/5] seccomp/cache: Add "emulator" to check if filter is constant allow YiFei Zhu
2020-10-12  6:46         ` Jann Horn
2020-10-11 15:47       ` [PATCH v5 seccomp 3/5] x86: Enable seccomp architecture tracking YiFei Zhu
2020-10-11 15:47       ` [PATCH v5 seccomp 4/5] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-10-11 15:47       ` [PATCH v5 seccomp 5/5] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-10-12  6:49         ` Jann Horn
2020-12-17 12:14         ` Geert Uytterhoeven
2020-12-17 18:34           ` YiFei Zhu
2020-12-18 12:35             ` Geert Uytterhoeven
2020-10-27 19:14       ` [PATCH v5 seccomp 0/5]seccomp: Add bitmap cache of constant allow filter results Kees Cook

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=202010091613.B671C86@keescook \
    --to=keescook@chromium.org \
    --cc=David.Laight@aculab.com \
    --cc=aarcange@redhat.com \
    --cc=bpf@vger.kernel.org \
    --cc=containers@lists.linux-foundation.org \
    --cc=cyphar@cyphar.com \
    --cc=dskarlat@cs.cmu.edu \
    --cc=frankeh@us.ibm.com \
    --cc=gscrivan@redhat.com \
    --cc=jannh@google.com \
    --cc=jianyan2@illinois.edu \
    --cc=linux-kernel@vger.kernel.org \
    --cc=luto@amacapital.net \
    --cc=tobin@ibm.com \
    --cc=torrella@illinois.edu \
    --cc=tycho@tycho.pizza \
    --cc=tyxu@illinois.edu \
    --cc=vrothber@redhat.com \
    --cc=wad@chromium.org \
    --cc=yifeifz2@illinois.edu \
    --cc=zhuyifei1999@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).