* [ammarfaizi2-block:stable/linux-stable-rc/queue/5.15 146/150] kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction
@ 2022-05-12 2:00 kernel test robot
2022-05-12 8:17 ` Peter Zijlstra
0 siblings, 1 reply; 4+ messages in thread
From: kernel test robot @ 2022-05-12 2:00 UTC (permalink / raw)
To: Peter Zijlstra
Cc: kbuild-all, GNU/Weeb Mailing List, linux-kernel, Sasha Levin,
Borislav Petkov
tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.15
head: 305e905f70311e1b49cc730931a19c3e364f4d8c
commit: 45dc9d706619a6814e4063d5431483f94badb5a1 [146/150] x86: Add straight-line-speculation mitigation
config: x86_64-randconfig-m001-20220509 (https://download.01.org/0day-ci/archive/20220512/[email protected]/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce (this is a W=1 build):
# https://github.com/ammarfaizi2/linux-block/commit/45dc9d706619a6814e4063d5431483f94badb5a1
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block stable/linux-stable-rc/queue/5.15
git checkout 45dc9d706619a6814e4063d5431483f94badb5a1
# save the config file
mkdir build_dir && cp config build_dir/.config
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 <[email protected]>
All warnings (new ones prefixed by >>):
>> kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction
--
>> mm/madvise.o: warning: objtool: madvise_behavior()+0x69: unreachable instruction
--
>> kernel/bpf/btf.o: warning: objtool: __btf_resolve_size()+0x72: unreachable instruction
--
0-DAY CI Kernel Test Service
https://01.org/lkp
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [ammarfaizi2-block:stable/linux-stable-rc/queue/5.15 146/150] kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction
2022-05-12 2:00 [ammarfaizi2-block:stable/linux-stable-rc/queue/5.15 146/150] kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction kernel test robot
@ 2022-05-12 8:17 ` Peter Zijlstra
2022-05-12 9:30 ` [kbuild-all] " Chen, Rong A
2022-05-12 17:11 ` Josh Poimboeuf
0 siblings, 2 replies; 4+ messages in thread
From: Peter Zijlstra @ 2022-05-12 8:17 UTC (permalink / raw)
To: kernel test robot
Cc: kbuild-all, GNU/Weeb Mailing List, linux-kernel, Sasha Levin,
Borislav Petkov
On Thu, May 12, 2022 at 10:00:33AM +0800, kernel test robot wrote:
> tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.15
> head: 305e905f70311e1b49cc730931a19c3e364f4d8c
> commit: 45dc9d706619a6814e4063d5431483f94badb5a1 [146/150] x86: Add straight-line-speculation mitigation
> config: x86_64-randconfig-m001-20220509 (https://download.01.org/0day-ci/archive/20220512/[email protected]/config)
> compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
> reproduce (this is a W=1 build):
> # https://github.com/ammarfaizi2/linux-block/commit/45dc9d706619a6814e4063d5431483f94badb5a1
> git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
> git fetch --no-tags ammarfaizi2-block stable/linux-stable-rc/queue/5.15
> git checkout 45dc9d706619a6814e4063d5431483f94badb5a1
> # save the config file
> mkdir build_dir && cp config build_dir/.config
> 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 <[email protected]>
>
> All warnings (new ones prefixed by >>):
>
> >> kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction
> --
> >> mm/madvise.o: warning: objtool: madvise_behavior()+0x69: unreachable instruction
> --
> >> kernel/bpf/btf.o: warning: objtool: __btf_resolve_size()+0x72: unreachable instruction
Would it be possible for the robot to include the output of this script:
https://lkml.kernel.org/r/3eb3f091fd6bd9caba50392ceab98ce756804f3b.1650578171.git.jpoimboe@redhat.com
for each objtool warning it gives (as run on vmlinux.o):
$ ./scripts/objdump-func build-output/vmlinux.o futex_atomic_op_inuser
$ ./scripts/objdump-func build-output/vmlinux.o madvise_behavior
$ ./scripts/objdump-func build-output/vmlinux.o __btf_resolve_size
etc.. that would make it easier to see what the problem is without
having to reproduce the build.
A super wild guess; but try this commit:
1ffbe4e935f9 ("objtool: Default ignore INT3 for unreachable")
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [kbuild-all] Re: [ammarfaizi2-block:stable/linux-stable-rc/queue/5.15 146/150] kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction
2022-05-12 8:17 ` Peter Zijlstra
@ 2022-05-12 9:30 ` Chen, Rong A
2022-05-12 17:11 ` Josh Poimboeuf
1 sibling, 0 replies; 4+ messages in thread
From: Chen, Rong A @ 2022-05-12 9:30 UTC (permalink / raw)
To: Peter Zijlstra, kernel test robot
Cc: kbuild-all, GNU/Weeb Mailing List, linux-kernel, Sasha Levin,
Borislav Petkov
On 5/12/2022 4:17 PM, Peter Zijlstra wrote:
> On Thu, May 12, 2022 at 10:00:33AM +0800, kernel test robot wrote:
>> tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.15
>> head: 305e905f70311e1b49cc730931a19c3e364f4d8c
>> commit: 45dc9d706619a6814e4063d5431483f94badb5a1 [146/150] x86: Add straight-line-speculation mitigation
>> config: x86_64-randconfig-m001-20220509 (https://download.01.org/0day-ci/archive/20220512/[email protected]/config)
>> compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
>> reproduce (this is a W=1 build):
>> # https://github.com/ammarfaizi2/linux-block/commit/45dc9d706619a6814e4063d5431483f94badb5a1
>> git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
>> git fetch --no-tags ammarfaizi2-block stable/linux-stable-rc/queue/5.15
>> git checkout 45dc9d706619a6814e4063d5431483f94badb5a1
>> # save the config file
>> mkdir build_dir && cp config build_dir/.config
>> 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 <[email protected]>
>>
>> All warnings (new ones prefixed by >>):
>>
>>>> kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction
>> --
>>>> mm/madvise.o: warning: objtool: madvise_behavior()+0x69: unreachable instruction
>> --
>>>> kernel/bpf/btf.o: warning: objtool: __btf_resolve_size()+0x72: unreachable instruction
>
> Would it be possible for the robot to include the output of this script:
Hi Peter,
Thanks for your advice, we'll support it asap.
Best Regards,
Rong Chen
>
> https://lkml.kernel.org/r/3eb3f091fd6bd9caba50392ceab98ce756804f3b.1650578171.git.jpoimboe@redhat.com
>
> for each objtool warning it gives (as run on vmlinux.o):
>
> $ ./scripts/objdump-func build-output/vmlinux.o futex_atomic_op_inuser
> $ ./scripts/objdump-func build-output/vmlinux.o madvise_behavior
> $ ./scripts/objdump-func build-output/vmlinux.o __btf_resolve_size
>
> etc.. that would make it easier to see what the problem is without
> having to reproduce the build.
>
> A super wild guess; but try this commit:
>
> 1ffbe4e935f9 ("objtool: Default ignore INT3 for unreachable")
>
> _______________________________________________
> kbuild-all mailing list -- [email protected]
> To unsubscribe send an email to [email protected]
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [ammarfaizi2-block:stable/linux-stable-rc/queue/5.15 146/150] kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction
2022-05-12 8:17 ` Peter Zijlstra
2022-05-12 9:30 ` [kbuild-all] " Chen, Rong A
@ 2022-05-12 17:11 ` Josh Poimboeuf
1 sibling, 0 replies; 4+ messages in thread
From: Josh Poimboeuf @ 2022-05-12 17:11 UTC (permalink / raw)
To: Peter Zijlstra
Cc: kernel test robot, kbuild-all, GNU/Weeb Mailing List,
linux-kernel, Sasha Levin, Borislav Petkov
On Thu, May 12, 2022 at 10:17:09AM +0200, Peter Zijlstra wrote:
> On Thu, May 12, 2022 at 10:00:33AM +0800, kernel test robot wrote:
> > tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.15
> > head: 305e905f70311e1b49cc730931a19c3e364f4d8c
> > commit: 45dc9d706619a6814e4063d5431483f94badb5a1 [146/150] x86: Add straight-line-speculation mitigation
> > config: x86_64-randconfig-m001-20220509 (https://download.01.org/0day-ci/archive/20220512/[email protected]/config)
> > compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
> > reproduce (this is a W=1 build):
> > # https://github.com/ammarfaizi2/linux-block/commit/45dc9d706619a6814e4063d5431483f94badb5a1
> > git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
> > git fetch --no-tags ammarfaizi2-block stable/linux-stable-rc/queue/5.15
> > git checkout 45dc9d706619a6814e4063d5431483f94badb5a1
> > # save the config file
> > mkdir build_dir && cp config build_dir/.config
> > 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 <[email protected]>
> >
> > All warnings (new ones prefixed by >>):
> >
> > >> kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction
> > --
> > >> mm/madvise.o: warning: objtool: madvise_behavior()+0x69: unreachable instruction
> > --
> > >> kernel/bpf/btf.o: warning: objtool: __btf_resolve_size()+0x72: unreachable instruction
>
> Would it be possible for the robot to include the output of this script:
>
> https://lkml.kernel.org/r/3eb3f091fd6bd9caba50392ceab98ce756804f3b.1650578171.git.jpoimboe@redhat.com
Ha, I already forgot about that script. I'll drop it into my
objtool/core branch (eventually for tip) unless anybody objects.
--
Josh
^ permalink raw reply [flat|nested] 4+ messages in thread
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2022-05-12 2:00 [ammarfaizi2-block:stable/linux-stable-rc/queue/5.15 146/150] kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction kernel test robot
2022-05-12 8:17 ` Peter Zijlstra
2022-05-12 9:30 ` [kbuild-all] " Chen, Rong A
2022-05-12 17:11 ` Josh Poimboeuf
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