[LKP] Re: [x86/entry] 2bbc68f837: ltp.ptrace08.fail
Andy Lutomirski <luto(a)amacapital.net> writes:
> On Jun 16, 2020, at 1:44 AM, Thomas Gleixner
<tglx(a)linutronix.de> wrote:
>
> kernel test robot <rong.a.chen(a)intel.com> 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"
Hahahaha. But not only LTP, also LKP-tests makes assumptions:
monitors/irq_exception_noise:[ "$exception" -eq "1" ] &&
export ftrace_filters='__do_page_fault do_divide_error do_overflow do_bounds
do_invalid_op do_device_not_available do_double_fault do_coprocessor_segment_overrun
do_invalid_TSS do_segment_not_present do_spurious_interrupt_bug do_coprocessor_error
do_alignment_check do_simd_coprocessor_error do_debug do_stack_segment
do_general_protection'
stable-api-nonsense.rst comes to my mind.
Thanks,
tglx