From: "H. Peter Anvin" <hpa@zytor.com>
To: Will Drewry <wad@chromium.org>
Cc: Eric Paris <eparis@redhat.com>,
Markus Gutschke <markus@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,
serge.hallyn@canonical.com, djm@mindrot.org,
scarybeasts@gmail.com, indan@nul.nu, pmoore@redhat.com,
akpm@linux-foundation.org, corbet@lwn.net,
eric.dumazet@gmail.com, keescook@chromium.org
Subject: [kernel-hardening] Re: [PATCH v8 3/8] seccomp: add system call filtering using BPF
Date: Thu, 16 Feb 2012 20:32:11 -0800 [thread overview]
Message-ID: <4F3DD84B.30808@zytor.com> (raw)
In-Reply-To: <CABqD9haiko3xLUKFp_MZcd8G7Hsyif75ABk1HOVKNJ7=NZRRsA@mail.gmail.com>
On 02/16/2012 08:26 PM, Will Drewry wrote:
>>
>> For x32 you have the option of introducing a new value or relying on bit
>> 30 in eax (and AUDIT_ARCH_X86_64). The latter is more natural, probably.
>
> Will that bit be visible as the syscall number or will it be stripped
> out before passing the number around? If it's visible, then it
> doesn't seem like there'd need to be a new AUDIT_ARCH, but I suspect
> someone like Eric will have an actually useful opinion.
>
Bit 30 is visible in orig_eax; whether you export it as part of "the
syscall number" is presumably TBD, but I think it's more natural to do so.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
WARNING: multiple messages have this Message-ID (diff)
From: "H. Peter Anvin" <hpa@zytor.com>
To: Will Drewry <wad@chromium.org>
Cc: Eric Paris <eparis@redhat.com>,
Markus Gutschke <markus@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,
serge.hallyn@canonical.com, djm@mindrot.org,
scarybeasts@gmail.com, indan@nul.nu, pmoore@redhat.com,
akpm@linux-foundation.org, corbet@lwn.net,
eric.dumazet@gmail.com, keescook@chromium.org
Subject: Re: [PATCH v8 3/8] seccomp: add system call filtering using BPF
Date: Thu, 16 Feb 2012 20:32:11 -0800 [thread overview]
Message-ID: <4F3DD84B.30808@zytor.com> (raw)
In-Reply-To: <CABqD9haiko3xLUKFp_MZcd8G7Hsyif75ABk1HOVKNJ7=NZRRsA@mail.gmail.com>
On 02/16/2012 08:26 PM, Will Drewry wrote:
>>
>> For x32 you have the option of introducing a new value or relying on bit
>> 30 in eax (and AUDIT_ARCH_X86_64). The latter is more natural, probably.
>
> Will that bit be visible as the syscall number or will it be stripped
> out before passing the number around? If it's visible, then it
> doesn't seem like there'd need to be a new AUDIT_ARCH, but I suspect
> someone like Eric will have an actually useful opinion.
>
Bit 30 is visible in orig_eax; whether you export it as part of "the
syscall number" is presumably TBD, but I think it's more natural to do so.
-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:[~2012-02-17 4:32 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-16 20:02 [PATCH v8 1/8] sk_run_filter: add support for custom load_pointer Will Drewry
2012-02-16 20:02 ` [PATCH v8 2/8] seccomp: kill the seccomp_t typedef Will Drewry
2012-02-20 2:55 ` James Morris
2012-02-16 20:02 ` [PATCH v8 3/8] seccomp: add system call filtering using BPF Will Drewry
2012-02-16 20:06 ` H. Peter Anvin
2012-02-16 20:25 ` [kernel-hardening] " Will Drewry
2012-02-16 20:25 ` Will Drewry
2012-02-16 21:17 ` [kernel-hardening] " H. Peter Anvin
2012-02-16 21:17 ` H. Peter Anvin
2012-02-16 21:28 ` [kernel-hardening] " Markus Gutschke
2012-02-16 21:28 ` Markus Gutschke
2012-02-16 21:34 ` [kernel-hardening] " H. Peter Anvin
2012-02-16 21:34 ` H. Peter Anvin
2012-02-16 21:51 ` [kernel-hardening] " Will Drewry
2012-02-16 21:51 ` Will Drewry
2012-02-16 22:06 ` [kernel-hardening] " H. Peter Anvin
2012-02-16 22:06 ` H. Peter Anvin
2012-02-16 23:00 ` [kernel-hardening] " Will Drewry
2012-02-16 23:00 ` Will Drewry
2012-02-17 0:23 ` [kernel-hardening] " Andrew Lutomirski
2012-02-17 0:23 ` Andrew Lutomirski
2012-02-17 0:43 ` [kernel-hardening] " H. Peter Anvin
2012-02-17 0:43 ` H. Peter Anvin
2012-02-17 0:50 ` [kernel-hardening] " Eric Paris
2012-02-17 0:50 ` Eric Paris
2012-02-17 2:24 ` [kernel-hardening] " H. Peter Anvin
2012-02-17 2:24 ` H. Peter Anvin
2012-02-17 3:53 ` [kernel-hardening] " Will Drewry
2012-02-17 3:53 ` Will Drewry
2012-02-17 4:12 ` [kernel-hardening] " H. Peter Anvin
2012-02-17 4:12 ` H. Peter Anvin
2012-02-17 4:26 ` [kernel-hardening] " Will Drewry
2012-02-17 4:26 ` Will Drewry
2012-02-17 4:32 ` H. Peter Anvin [this message]
2012-02-17 4:32 ` H. Peter Anvin
2012-02-17 4:40 ` [kernel-hardening] " Will Drewry
2012-02-17 4:40 ` Will Drewry
2012-02-16 21:31 ` [kernel-hardening] " Will Drewry
2012-02-16 21:31 ` Will Drewry
2012-02-17 0:48 ` [kernel-hardening] " Indan Zupancic
2012-02-17 0:48 ` Indan Zupancic
2012-02-17 0:51 ` [kernel-hardening] " Andrew Lutomirski
2012-02-17 0:51 ` Andrew Lutomirski
2012-02-17 1:10 ` [kernel-hardening] " H. Peter Anvin
2012-02-17 1:10 ` H. Peter Anvin
2012-02-17 1:25 ` [kernel-hardening] " Indan Zupancic
2012-02-17 1:25 ` Indan Zupancic
2012-02-17 1:33 ` [kernel-hardening] " H. Peter Anvin
2012-02-17 1:33 ` H. Peter Anvin
2012-02-17 2:00 ` [kernel-hardening] " Indan Zupancic
2012-02-17 2:00 ` Indan Zupancic
2012-02-17 2:16 ` [kernel-hardening] " Andrew Lutomirski
2012-02-17 2:16 ` Andrew Lutomirski
2012-02-17 2:22 ` [kernel-hardening] " H. Peter Anvin
2012-02-17 2:22 ` H. Peter Anvin
2012-02-17 3:27 ` [kernel-hardening] " Indan Zupancic
2012-02-17 3:27 ` Indan Zupancic
2012-02-17 4:09 ` [kernel-hardening] " H. Peter Anvin
2012-02-17 4:09 ` H. Peter Anvin
2012-02-17 4:51 ` [kernel-hardening] " Indan Zupancic
2012-02-17 4:51 ` Indan Zupancic
2012-02-17 2:44 ` [kernel-hardening] " Indan Zupancic
2012-02-17 2:44 ` Indan Zupancic
2012-02-17 2:44 ` Indan Zupancic
2012-02-17 2:44 ` Indan Zupancic
2012-02-17 3:38 ` [kernel-hardening] " Will Drewry
2012-02-16 20:02 ` [PATCH v8 4/8] seccomp: add SECCOMP_RET_ERRNO Will Drewry
2012-02-16 20:02 ` [PATCH v8 5/8] seccomp: Add SECCOMP_RET_TRAP Will Drewry
[not found] ` <CAE6n16mCrJC=Sre+PT1H_VfSjW0MGyi0xtEcdcRvGMvvwXWzmA@mail.gmail.com>
2012-02-16 20:28 ` Markus Gutschke
2012-02-16 21:23 ` H. Peter Anvin
2012-02-16 20:42 ` [kernel-hardening] " Will Drewry
2012-02-16 20:42 ` Will Drewry
2012-02-16 21:11 ` [kernel-hardening] [PATCH v9 " Will Drewry
2012-02-16 21:11 ` Will Drewry
2012-02-16 21:11 ` [kernel-hardening] [PATCH v9 8/8] Documentation: prctl/seccomp_filter Will Drewry
2012-02-16 21:11 ` Will Drewry
2012-02-16 21:28 ` [kernel-hardening] Re: [PATCH v8 5/8] seccomp: Add SECCOMP_RET_TRAP H. Peter Anvin
2012-02-16 21:28 ` H. Peter Anvin
2012-02-16 21:33 ` [kernel-hardening] " Will Drewry
2012-02-16 21:33 ` Will Drewry
2012-02-16 20:02 ` [PATCH v8 6/8] ptrace,seccomp: Add PTRACE_SECCOMP support Will Drewry
2012-02-17 5:08 ` Indan Zupancic
2012-02-17 5:08 ` Indan Zupancic
2012-02-17 5:08 ` Indan Zupancic
2012-02-17 16:23 ` Will Drewry
2012-02-17 22:55 ` Indan Zupancic
2012-02-21 17:31 ` Will Drewry
2012-02-16 20:02 ` [PATCH v8 7/8] x86: Enable HAVE_ARCH_SECCOMP_FILTER Will Drewry
2012-02-16 20:02 ` [PATCH v8 8/8] Documentation: prctl/seccomp_filter Will Drewry
2012-02-16 20:08 ` [kernel-hardening] Re: [PATCH v8 1/8] sk_run_filter: add support for custom load_pointer Will Drewry
2012-02-16 20:08 ` Will Drewry
2012-02-17 1:54 ` Joe Perches
2012-02-17 2:22 ` Will Drewry
2012-02-17 3:04 ` Indan Zupancic
2012-02-17 3:04 ` Indan Zupancic
2012-02-17 3:04 ` Indan Zupancic
2012-02-17 4:13 ` Will Drewry
2012-02-17 5:05 ` Indan Zupancic
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