linux-kernel - [LKP] [tools/bpf] f6f3bac08f: stderr.failed_to_prepare_for

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Date:   Mon, 5 Nov 2018 13:36:35 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Yonghong Song <yhs@...com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>, lkp@...org
Subject: [LKP] [tools/bpf]  f6f3bac08f: stderr.failed_to_prepare_for_bpf

FYI, we noticed the following commit (built with gcc-7):

commit: f6f3bac08ff9855d803081a353a1fafaa8845739 ("tools/bpf: bpftool: add net support")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: bpf_offload
with following parameters:

	ucode: 0xb00002e



on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 64G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):




KERNEL SELFTESTS: linux_headers_dir is /usr/src/linux-headers-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739
2018-11-03 10:11:02 cd /usr/src/linux-selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/testing/selftests
2018-11-03 10:11:02 ln -sf /usr/bin/clang-7 /usr/bin/clang
2018-11-03 10:11:02 ln -sf /usr/bin/llc-7 /usr/bin/llc
make: Entering directory '/usr/src/perf_selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/bpf'

Auto-detecting system features:
...                        libbfd: [ .[31mOFF.[m ]
...        disassembler-four-args: [ .[31mOFF.[m ]

  CC       bpf_jit_disasm.o
  LINK     bpf_jit_disasm
  CC       bpf_dbg.o
  LINK     bpf_dbg
  CC       bpf_asm.o
  BISON    bpf_exp.yacc.c
  CC       bpf_exp.yacc.o
  FLEX     bpf_exp.lex.c
  CC       bpf_exp.lex.o
  LINK     bpf_asm
  DESCEND  bpftool
make[1]: Entering directory '/usr/src/perf_selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/bpf/bpftool'

Auto-detecting system features:
...                        libbfd: [ .[31mOFF.[m ]
...        disassembler-four-args: [ .[31mOFF.[m ]

  CC       map_perf_ring.o
  CC       xlated_dumper.o
  CC       perf.o
  CC       prog.o
  CC       btf_dumper.o
  CC       net.o
  CC       netlink_dumper.o
Makefile:96: recipe for target 'netlink_dumper.o' failed
make[1]: Leaving directory '/usr/src/perf_selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/bpf/bpftool'
Makefile:99: recipe for target 'bpftool' failed
make: Leaving directory '/usr/src/perf_selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/bpf'



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Rong Chen

View attachment "config-4.19.0-rc2-00335-gf6f3bac" of type "text/plain" (167715 bytes)

View attachment "job-script" of type "text/plain" (4790 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (22676 bytes)

View attachment "bpf_offload" of type "text/plain" (1645 bytes)

View attachment "job.yaml" of type "text/plain" (4008 bytes)

View attachment "reproduce" of type "text/plain" (184 bytes)