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* vmlinux.o: warning: objtool: kvm_spurious_fault()+0x22: call to ftrace_likely_update() leaves .noinstr.text section
@ 2021-11-13  2:48 ` kernel test robot
  0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2021-11-13  2:48 UTC (permalink / raw)
  To: Peter Zijlstra; +Cc: kbuild-all, linux-kernel, Thomas Gleixner, Ingo Molnar

[-- Attachment #1: Type: text/plain, Size: 3844 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   66f4beaa6c1d28161f534471484b2daa2de1dce0
commit: 63b3f96e1a989846a5a521d4fbef4bc86406929d kvm: Select SCHED_INFO instead of TASK_DELAY_ACCT
date:   6 months ago
config: x86_64-buildonly-randconfig-r002-20211009 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=63b3f96e1a989846a5a521d4fbef4bc86406929d
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 63b3f96e1a989846a5a521d4fbef4bc86406929d
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   vmlinux.o: warning: objtool: __do_fast_syscall_32()+0xf2: call to trace_hardirqs_off() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: kvm_spurious_fault()+0x22: call to ftrace_likely_update() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: vmx_update_host_rsp()+0x34: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: __svm_vcpu_run()+0xb4: BP used as a scratch register
   vmlinux.o: warning: objtool: __svm_sev_es_vcpu_run()+0x1c: BP used as a scratch register
   vmlinux.o: warning: objtool: __wrgsbase_inactive()+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: __rdgsbase_inactive()+0x35: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: fixup_bad_iret()+0x7a: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: noist_exc_debug()+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: exc_nmi()+0xbb: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: poke_int3_handler()+0x45: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: mce_check_crashing_cpu()+0x19: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: do_machine_check()+0xc41: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: exc_machine_check()+0x63: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_nmi_enter()+0x4c: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_nmi_exit()+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: enter_from_user_mode()+0x3d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: syscall_enter_from_user_mode()+0x46: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare()+0x3d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_enter_from_user_mode()+0x3d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_exit()+0x2d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: context_tracking_recursion_enter()+0x40: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: __context_tracking_enter()+0x2f: call to ftrace_likely_update() leaves .noinstr.text section

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 35813 bytes --]

^ permalink raw reply	[flat|nested] 4+ messages in thread
* vmlinux.o: warning: objtool: kvm_spurious_fault()+0x22: call to ftrace_likely_update() leaves .noinstr.text section
@ 2021-11-13  2:48 ` kernel test robot
  0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2021-11-13  2:48 UTC (permalink / raw)
  To: kbuild-all

[-- Attachment #1: Type: text/plain, Size: 3893 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   66f4beaa6c1d28161f534471484b2daa2de1dce0
commit: 63b3f96e1a989846a5a521d4fbef4bc86406929d kvm: Select SCHED_INFO instead of TASK_DELAY_ACCT
date:   6 months ago
config: x86_64-buildonly-randconfig-r002-20211009 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=63b3f96e1a989846a5a521d4fbef4bc86406929d
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 63b3f96e1a989846a5a521d4fbef4bc86406929d
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   vmlinux.o: warning: objtool: __do_fast_syscall_32()+0xf2: call to trace_hardirqs_off() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: kvm_spurious_fault()+0x22: call to ftrace_likely_update() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: vmx_update_host_rsp()+0x34: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: __svm_vcpu_run()+0xb4: BP used as a scratch register
   vmlinux.o: warning: objtool: __svm_sev_es_vcpu_run()+0x1c: BP used as a scratch register
   vmlinux.o: warning: objtool: __wrgsbase_inactive()+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: __rdgsbase_inactive()+0x35: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: fixup_bad_iret()+0x7a: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: noist_exc_debug()+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: exc_nmi()+0xbb: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: poke_int3_handler()+0x45: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: mce_check_crashing_cpu()+0x19: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: do_machine_check()+0xc41: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: exc_machine_check()+0x63: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_nmi_enter()+0x4c: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_nmi_exit()+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: enter_from_user_mode()+0x3d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: syscall_enter_from_user_mode()+0x46: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare()+0x3d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_enter_from_user_mode()+0x3d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_exit()+0x2d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: context_tracking_recursion_enter()+0x40: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: __context_tracking_enter()+0x2f: call to ftrace_likely_update() leaves .noinstr.text section

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 35813 bytes --]

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: vmlinux.o: warning: objtool: kvm_spurious_fault()+0x22: call to ftrace_likely_update() leaves .noinstr.text section
  2021-11-13  2:48 ` kernel test robot
@ 2021-11-13  7:31   ` Peter Zijlstra
  -1 siblings, 0 replies; 4+ messages in thread
From: Peter Zijlstra @ 2021-11-13  7:31 UTC (permalink / raw)
  To: kernel test robot; +Cc: kbuild-all, linux-kernel, Thomas Gleixner, Ingo Molnar

On Sat, Nov 13, 2021 at 10:48:52AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   66f4beaa6c1d28161f534471484b2daa2de1dce0
> commit: 63b3f96e1a989846a5a521d4fbef4bc86406929d kvm: Select SCHED_INFO instead of TASK_DELAY_ACCT
> date:   6 months ago
> config: x86_64-buildonly-randconfig-r002-20211009 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=63b3f96e1a989846a5a521d4fbef4bc86406929d
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 63b3f96e1a989846a5a521d4fbef4bc86406929d
>         # save the attached .config to linux build tree
>         mkdir build_dir
>         make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All warnings (new ones prefixed by >>):
> 
> >> vmlinux.o: warning: objtool: kvm_spurious_fault()+0x22: call to ftrace_likely_update() leaves .noinstr.text section
> >> vmlinux.o: warning: objtool: vmx_update_host_rsp()+0x34: call to ftrace_likely_update() leaves .noinstr.text section

Yeah, that's CONFIG_TRACE_BRANCH_PROFILING and it is broken. It will
eventually explode once we push the PTI CR3 switcheroo into C due to
trying to access kernel data before kernel address space is mapped.



^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: vmlinux.o: warning: objtool: kvm_spurious_fault()+0x22: call to ftrace_likely_update() leaves .noinstr.text section
@ 2021-11-13  7:31   ` Peter Zijlstra
  0 siblings, 0 replies; 4+ messages in thread
From: Peter Zijlstra @ 2021-11-13  7:31 UTC (permalink / raw)
  To: kbuild-all

[-- Attachment #1: Type: text/plain, Size: 1599 bytes --]

On Sat, Nov 13, 2021 at 10:48:52AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   66f4beaa6c1d28161f534471484b2daa2de1dce0
> commit: 63b3f96e1a989846a5a521d4fbef4bc86406929d kvm: Select SCHED_INFO instead of TASK_DELAY_ACCT
> date:   6 months ago
> config: x86_64-buildonly-randconfig-r002-20211009 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=63b3f96e1a989846a5a521d4fbef4bc86406929d
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 63b3f96e1a989846a5a521d4fbef4bc86406929d
>         # save the attached .config to linux build tree
>         mkdir build_dir
>         make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All warnings (new ones prefixed by >>):
> 
> >> vmlinux.o: warning: objtool: kvm_spurious_fault()+0x22: call to ftrace_likely_update() leaves .noinstr.text section
> >> vmlinux.o: warning: objtool: vmx_update_host_rsp()+0x34: call to ftrace_likely_update() leaves .noinstr.text section

Yeah, that's CONFIG_TRACE_BRANCH_PROFILING and it is broken. It will
eventually explode once we push the PTI CR3 switcheroo into C due to
trying to access kernel data before kernel address space is mapped.


^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-11-13  7:31 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-11-13  2:48 vmlinux.o: warning: objtool: kvm_spurious_fault()+0x22: call to ftrace_likely_update() leaves .noinstr.text section kernel test robot
2021-11-13  2:48 ` kernel test robot
2021-11-13  7:31 ` Peter Zijlstra
2021-11-13  7:31   ` Peter Zijlstra

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