Date: Tue, 26 Sep 2017 08:25:05 +0200
From: Ingo Molnar <mingo@kernel.org>
To: Fengguang Wu <wfg@linux.intel.com>
Cc: Eric Biggers <ebiggers@google.com>, LKP <lkp@01.org>,
        linux-kernel@vger.kernel.org, Rik van Riel <riel@redhat.com>,
        Kees Cook <keescook@chromium.org>
Subject: Re: 9f4835fb96 ("x86/fpu: Tighten validation of user-supplied .."):
 Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
Message-ID: <20170926062505.jm3euf5bihcnzhdt@gmail.com>
References: <59c6e23f.nOk6ceVoId2JVMIx%fengguang.wu@intel.com>
 <20170925022013.g46frhgxfaniyoab@wfg-t540p.sh.intel.com>
 <20170925131033.2mvlrspgvti5tpbj@wfg-t540p.sh.intel.com>
 <20170925145509.py4prxskkbpqfjsd@gmail.com>
 <20170926001947.7ceoek4wt7fvuchz@wfg-t540p.sh.intel.com>
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* Fengguang Wu <wfg@linux.intel.com> wrote:

> On Mon, Sep 25, 2017 at 04:55:09PM +0200, Ingo Molnar wrote:
> > 
> > * Fengguang Wu <wfg@linux.intel.com> wrote:
> > 
> > > On Mon, Sep 25, 2017 at 10:20:13AM +0800, kernel test robot wrote:
> > > > Hi Ingo,
> > > >
> > > > On your request I'm resending the report here, with attached dmesg,
> > > > kconfig and reproduce script.
> > > >
> > > > I'll go on to test your split up commits, too.
> > > >
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.x86/fpu
> > > 
> > > It looks 6fc19a42 ("x86/fpu: Use validate_xstate_header() to validate
> > > the xstate_header in sanitize_restored_xstate()") is the first bad commit.
> > 
> > Thank you! Could you check that the latest tip:master or tip:WIP.x86/fpu
> > (9cff7344187e) fixes this crash?
> 
> Yes, both of them are free from that crash. :)

Great, thanks!

	Ingo