From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Tobin C. Harding" <me@tobin.cc>
Subject: Re: [kernel-hardening] [PATCH 0/3] kallsyms: don't leak address
Date: Mon, 18 Dec 2017 20:17:15 +1100
Message-ID: <20171218091715.GF4627@eros>
References: <1513554812-13014-1-git-send-email-me@tobin.cc>
 <87o9mwa9g2.fsf@concordia.ellerman.id.au>
 <20171218060048.GD4627@eros>
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Cc: kernel-hardening@lists.openwall.com,
        Steven Rostedt <rostedt@goodmis.org>,
        Tycho Andersen <tycho@tycho.ws>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Kees Cook <keescook@chromium.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Alexei Starovoitov <ast@kernel.org>,
        linux-kernel@vger.kernel.org,
        Network Development <netdev@vger.kernel.org>
To: Michael Ellerman <mpe@ellerman.id.au>
Return-path: <linux-kernel-owner@vger.kernel.org>
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In-Reply-To: <20171218060048.GD4627@eros>
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On Mon, Dec 18, 2017 at 05:00:48PM +1100, Tobin C. Harding wrote:
> On Mon, Dec 18, 2017 at 04:31:25PM +1100, Michael Ellerman wrote:
> > "Tobin C. Harding" <me@tobin.cc> writes:
> > 
> > > This set plugs a kernel address leak that occurs if kallsyms symbol
> > > look up fails. This set was prompted by a leaking address found using
> > > scripts/leaking_addresses.pl on a PowerPC machine in the wild.
> > 
> > Any details on that? I haven't heard about it.
> 
> I have an account on a server in USA. I'm not sure how much detail I
> should give on the mailing list in case it is sensitive information. I
> will email you off list. Responding here for the benefit of the list.

Geez I'm a goose. Here is the details with a sanitized address.

/proc/8025/task/8025/stack: [<0000000000000000>] 0xc0000001XXXXXXXX

$ uname -r
4.4.0-79-powerpc64-smp

thanks,
Tobin.