Re: ld.lld: error: undefined symbol: __tsan_memcpy

[Marco Elver]

This is being fixed:
https://lore.kernel.org/all/20220907173903.2268161-1-elver@xxxxxxxxxx/T/#u

This is an extremely fresh version of Clang, which has no release yet.
So the report is not urgent.

On Thu, 8 Sept 2022 at 14:33, kernel test robot <lkp@xxxxxxxxx> wrote:
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   0066f1b0e27556381402db3ff31f85d2a2265858
> commit: dd03762ab608e058c8f390ad9cf667e490089796 arm64: Enable KCSAN
> date:   9 months ago
> config: arm64-randconfig-r031-20220908
> compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project c55b41d5199d2394dd6cdb8f52180d8b81d809d4)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install arm64 cross compiling tool for clang build
>         # apt-get install binutils-aarch64-linux-gnu
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dd03762ab608e058c8f390ad9cf667e490089796
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout dd03762ab608e058c8f390ad9cf667e490089796
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash
>
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
>
> All errors (new ones prefixed by >>):
>
> >> ld.lld: error: undefined symbol: __tsan_memcpy
>    >>> referenced by main.c
>    >>>               main.o:(do_one_initcall) in archive init/built-in.a
>    >>> referenced by main.c
>    >>>               main.o:(setup_command_line) in archive init/built-in.a
>    >>> referenced by initramfs.c
>    >>>               initramfs.o:(panic_show_mem) in archive init/built-in.a
>    >>> referenced 4283 more times
> --
> >> ld.lld: error: undefined symbol: __tsan_memset
>    >>> referenced by main.c
>    >>>               main.o:(init_setup) in archive init/built-in.a
>    >>> referenced by main.c
>    >>>               main.o:(rdinit_setup) in archive init/built-in.a
>    >>> referenced by do_mounts_rd.c
>    >>>               do_mounts_rd.o:(identify_ramdisk_image) in archive init/built-in.a
>    >>> referenced 6155 more times
> --
> >> ld.lld: error: undefined symbol: __tsan_memmove
>    >>> referenced by main.c
>    >>>               main.o:(repair_env_string) in archive init/built-in.a
>    >>> referenced by range.c
>    >>>               range.o:(add_range_with_merge) in archive kernel/built-in.a
>    >>> referenced by printk.c
>    >>>               printk/printk.o:(vprintk_store) in archive kernel/built-in.a
>    >>> referenced 252 more times
>
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp