Re: [x86/entry] 2bbc68f837: ltp.ptrace08.fail

[Peter Zijlstra]

On Tue, Jun 16, 2020 at 06:22:10AM -0700, Andy Lutomirski wrote:
> 
> > On Jun 16, 2020, at 1:44 AM, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> > 
> > ïkernel test robot <rong.a.chen@xxxxxxxxx> writes:
> >> FYI, we noticed the following commit (built with gcc-9):
> >> 
> >> commit: 2bbc68f8373c0631ebf137f376fbea00e8086be7 ("x86/entry: Convert Debug exception to IDTENTRY_DB")
> >> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> > 
> > Is the head of linux.git exposing the same problem or is this an
> > intermittent failure, which only affects bisectability?
> 
> It sure looks deterministic:
> 
> ptrace08.c:62: BROK: Cannot find address of kernel symbol "do_debug"

ROFL