Re: [kernel-hardening] [PATCH 0/3] kallsyms: don't leak address

Tobin C. Harding
2017-12-18T09:17:15Z

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.