From: "H. Peter Anvin" <hpa@linux.intel.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Philipp Kern <pkern@google.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"H. J. Lu" <hjl.tools@gmail.com>, Eric Paris <eparis@redhat.com>
Subject: Re: [PATCH] x32: Mask away the x32 syscall bit in the ptrace codepath
Date: Wed, 28 May 2014 14:19:38 -0700 [thread overview]
Message-ID: <538652EA.3040606@linux.intel.com> (raw)
In-Reply-To: <CALCETrWd9dbBt03u5cpJx+p3D7NeT-d2_=kTg94CRGMq7ji7kQ@mail.gmail.com>
On 05/28/2014 02:15 PM, Andy Lutomirski wrote:
>>
>>> 3. The OOPS you're fixing doesn't seem like it's fixed. What if some
>>> other random high bits are set?
>>
>> There is a range check in entry_*.S for the system call.
>
> I can imagine that causing a certain amount of confusion to fancy
> seccomp users. Oh, well. No one that I know of has complained yet.
>
I don't know how seccomp or audit deal with out-of-range syscall
numbers, so that might be worth taking a look at.
-hpa
next prev parent reply other threads:[~2014-05-28 21:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-28 12:19 [PATCH] x32: Mask away the x32 syscall bit in the ptrace codepath Philipp Kern
2014-05-28 20:47 ` Andy Lutomirski
2014-05-28 20:58 ` Philipp Kern
2014-05-28 21:01 ` H. Peter Anvin
2014-05-28 21:15 ` Andy Lutomirski
2014-05-28 21:19 ` H. Peter Anvin [this message]
2014-05-28 21:43 ` Andy Lutomirski
2014-05-28 21:53 ` Philipp Kern
2014-05-28 21:55 ` Andy Lutomirski
2014-05-28 22:37 ` H. Peter Anvin
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