[Linaro-TCWG-CI] v6.17.3-130-g86f364ee5842: Failure on aarch64

[Linaro-TCWG-CI] v6.17.3-130-g86f364ee5842: Failure on aarch64

[ci_notify]

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Dear contributor,

Our automatic CI has detected problems related to your patch(es). Please find some details below.

In tcwg_kernel/llvm-master-aarch64-stable-allnoconfig, after:
  | commit v6.17.3-130-g86f364ee5842
  | Author: Masahiro Yamada <masahiroy@kernel.org>
  | Date:   Thu Sep 18 10:05:46 2025 +0200
  | 
  |     kbuild: always create intermediate vmlinux.unstripped
  |     
  |     [ Upstream commit 0ce5139fd96e9d415d3faaef1c575e238f9bbd67 ]
  |     
  |     Generate the intermediate vmlinux.unstripped regardless of
  | ... 14 lines of the commit log omitted.

Produces Failure:
  | Results changed to
  | # reset_artifacts:
  | -10
  | # build_abe binutils:
  | -9
  | # build_kernel_llvm:
  | -5
  | # build_abe qemu:
  | -2
  | # linux_n_obj:
  | 693
  | # First few build errors in logs:
  | # 00:05:55 make[2]: *** [arch/arm64/boot/Makefile:23: arch/arm64/boot/Image] Error 1
  | # 00:05:55 make[1]: *** [arch/arm64/Makefile:180: Image] Error 2
  | # 00:05:55 make: *** [Makefile:248: __sub-make] Error 2
  | 
  | From
  | # reset_artifacts:
  | -10
  | # build_abe binutils:
  | -9
  | # build_kernel_llvm:
  | -5
  | # build_abe qemu:
  | -2
  | # linux_n_obj:
  | 693
  | # linux build successful:
  | all
  | # linux boot successful:
  | boot

Used configuration :
 tcwg_kernel/llvm-master-aarch64-stable-allnoconfig

We track this bug report under https://linaro.atlassian.net/browse/LLVM-2107. Please let us know if you have a fix.

If you have any questions regarding this report, please ask on linaro-toolchain@lists.linaro.org mailing list.

-----------------8<--------------------------8<--------------------------8<--------------------------

The information below contains the details of the failures, and the ways to reproduce a debug environment:



Current build   : https://ci.linaro.org/job/tcwg_kernel--llvm-master-aarch64-stable-allnoconfig-build/258/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_kernel--llvm-master-aarch64-stable-allnoconfig-build/257/artifact/artifacts

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/linux/sha1/86f364ee58420e4e0709a1134e0d0d01bcc1758b/tcwg_kernel/llvm-master-aarch64-stable-allnoconfig/reproduction_instructions.txt

Full commit : https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable/commit/86f364ee58420e4e0709a1134e0d0d01bcc1758b

Re: [Linaro-TCWG-CI] v6.17.3-130-g86f364ee5842: Failure on aarch64

[Nathan Chancellor]

On Sun, Oct 26, 2025 at 05:01:16PM +0000, ci_notify@linaro.org wrote:
> Dear contributor,
> 
> Our automatic CI has detected problems related to your patch(es). Please find some details below.
> 
> In tcwg_kernel/llvm-master-aarch64-stable-allnoconfig, after:
>   | commit v6.17.3-130-g86f364ee5842
>   | Author: Masahiro Yamada <masahiroy@kernel.org>
>   | Date:   Thu Sep 18 10:05:46 2025 +0200
>   | 
>   |     kbuild: always create intermediate vmlinux.unstripped
>   |     
>   |     [ Upstream commit 0ce5139fd96e9d415d3faaef1c575e238f9bbd67 ]
>   |     
>   |     Generate the intermediate vmlinux.unstripped regardless of
>   | ... 14 lines of the commit log omitted.

This is reproducible for me locally with:

  $ make -skj"$(nproc)" ARCH=arm64 CC=clang CROSS_COMPILE=aarch64-linux-gnu- HOSTCC=clang LD=ld.lld clean allnoconfig all
  aarch64-linux-gnu-objcopy: vmlinux: file format not recognized
  ...

This does not occur with llvm-objcopy via LLVM=1 nor does it happen with
an all GNU setup. This feels like a bug in GNU objcopy though, as this
is reproducible with:

  $ aarch64-linux-gnu-objcopy --set-section-flags .modinfo=noload vmlinux.unstripped vmlinux.objcopy

  $ file vmlinux.unstripped vmlinux.objcopy
  vmlinux.unstripped: ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), statically linked, BuildID[sha1]=18512f67dae70a7fae145b34514054a8b8b3c105, not stripped
  vmlinux.objcopy:    ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), statically linked, BuildID[sha1]=18512f67dae70a7fae145b34514054a8b8b3c105, not stripped

  $ aarch64-linux-gnu-objcopy --remove-section=.modinfo -w --strip-unneeded-symbol='__mod_device_table__*' vmlinux.objcopy
  aarch64-linux-gnu-objcopy: vmlinux.objcopy: file format not recognized

  $ aarch64-linux-gnu-objcopy --version | head -1
  GNU objcopy (GNU Binutils) 2.45.50.20251028

Cheers,
Nathan