Re: [PATCH bpf-next v1 06/11] bpf: Report may_goto timeout to BPF stderr

[kernel test robot <lkp@intel.com>]

Hi Kumar,

kernel test robot noticed the following build errors:

[auto build test ERROR on 43745d11bfd9683abdf08ad7a5cc403d6a9ffd15]

url:    https://github.com/intel-lab-lkp/linux/commits/Kumar-Kartikeya-Dwivedi/bpf-Introduce-bpf_dynptr_from_mem_slice/20250508-012020
base:   43745d11bfd9683abdf08ad7a5cc403d6a9ffd15
patch link:    https://lore.kernel.org/r/20250507171720.1958296-7-memxor%40gmail.com
patch subject: [PATCH bpf-next v1 06/11] bpf: Report may_goto timeout to BPF stderr
config: microblaze-defconfig (https://download.01.org/0day-ci/archive/20250508/202505082019.euW3a7Kk-lkp@intel.com/config)
compiler: microblaze-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250508/202505082019.euW3a7Kk-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505082019.euW3a7Kk-lkp@intel.com/

All errors (new ones prefixed by >>):

   microblaze-linux-ld: kernel/bpf/core.o: in function `bpf_prog_report_may_goto_violation':
>> kernel/bpf/core.c:3166:(.text+0x6e08): undefined reference to `bpf_prog_stream_error_limit'
>> microblaze-linux-ld: kernel/bpf/core.c:3166:(.text+0x6e28): undefined reference to `bpf_stream_stage_init'
>> microblaze-linux-ld: kernel/bpf/core.c:3166:(.text+0x6e3c): undefined reference to `bpf_stream_stage_printk'
>> microblaze-linux-ld: kernel/bpf/core.c:3166:(.text+0x6e48): undefined reference to `bpf_stream_stage_dump_stack'
>> microblaze-linux-ld: kernel/bpf/core.c:3166:(.text+0x6e5c): undefined reference to `bpf_stream_stage_commit'
>> microblaze-linux-ld: kernel/bpf/core.c:3166:(.text+0x6e68): undefined reference to `bpf_stream_stage_free'


vim +3166 kernel/bpf/core.c

  3158	
  3159	static noinline void bpf_prog_report_may_goto_violation(void)
  3160	{
  3161		struct bpf_prog *prog;
  3162	
  3163		prog = bpf_prog_find_from_stack();
  3164		if (!prog)
  3165			return;
> 3166		bpf_stream_stage(prog, BPF_STDERR, ({
  3167			bpf_stream_printk("ERROR: Timeout detected for may_goto instruction\n");
  3168			bpf_stream_dump_stack();
  3169		}));
  3170	}
  3171	

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