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[Jürg Häfliger <1908499@xxxxxxxxxxxxxxxxxx>]

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1908499

Title:
  udpgro.sh in net from ubuntu_kernel_selftests seems not reflecting
  sub-test result

Status in ubuntu-kernel-tests:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux-oem-5.10 package in Ubuntu:
  Invalid
Status in linux-oem-5.6 package in Ubuntu:
  Invalid
Status in linux source package in Focal:
  Fix Released
Status in linux-oem-5.10 source package in Focal:
  Fix Released
Status in linux-oem-5.6 source package in Focal:
  Fix Released
Status in linux source package in Groovy:
  Fix Released
Status in linux source package in Hirsute:
  Fix Released

Bug description:
  [Impact]
  In udpgro.sh, the exit value is 0 even if there are some failed sub
  test cases:

  $ sudo ./udpgro.sh
  ipv4
   no GRO
  BTF debug data section '.BTF' rejected: Invalid argument (22)!
   - Length: 568
  Verifier analysis:

  magic: 0xeb9f
  version: 1
  flags: 0x0
  hdr_len: 24
  type_off: 0
  type_len: 256
  str_off: 256
  str_len: 288
  btf_total_size: 568
  [1] PTR (anon) type_id=2
  [2] STRUCT xdp_md size=20 vlen=5
   data type_id=3 bits_offset=0
   data_end type_id=3 bits_offset=32
   data_meta type_id=3 bits_offset=64
   ingress_ifindex type_id=3 bits_offset=96
   rx_queue_index type_id=3 bits_offset=128
  [3] TYPEDEF __u32 type_id=4
  [4] INT unsigned int size=4 bits_offset=0 nr_bits=32 encoding=(none)
  [5] FUNC_PROTO (anon) return=6 args=(1 ctx)
  [6] INT int size=4 bits_offset=0 nr_bits=32 encoding=SIGNED
  [7] FUNC xdp_dummy_prog type_id=5
  [8] INT char size=1 bits_offset=0 nr_bits=8 encoding=SIGNED
  [9] ARRAY (anon) type_id=8 index_type_id=10 nr_elems=4
  [10] INT __ARRAY_SIZE_TYPE__ size=4 bits_offset=0 nr_bits=32 encoding=(none)
  [11] VAR _license type_id=9 linkage=1
  [12] DATASEC license size=0 vlen=1 size == 0

  ./udpgso_bench_rx: poll: 0x0 expected 0x1

  failed
  ./udpgso_bench_tx: write: Connection refused

  ...

   multiple GRO socks
  BTF debug data section '.BTF' rejected: Invalid argument (22)!
   - Length: 568
  Verifier analysis:

  magic: 0xeb9f
  version: 1
  flags: 0x0
  hdr_len: 24
  type_off: 0
  type_len: 256
  str_off: 256
  str_len: 288
  btf_total_size: 568
  [1] PTR (anon) type_id=2
  [2] STRUCT xdp_md size=20 vlen=5
   data type_id=3 bits_offset=0
   data_end type_id=3 bits_offset=32
   data_meta type_id=3 bits_offset=64
   ingress_ifindex type_id=3 bits_offset=96
   rx_queue_index type_id=3 bits_offset=128
  [3] TYPEDEF __u32 type_id=4
  [4] INT unsigned int size=4 bits_offset=0 nr_bits=32 encoding=(none)
  [5] FUNC_PROTO (anon) return=6 args=(1 ctx)
  [6] INT int size=4 bits_offset=0 nr_bits=32 encoding=SIGNED
  [7] FUNC xdp_dummy_prog type_id=5
  [8] INT char size=1 bits_offset=0 nr_bits=8 encoding=SIGNED
  [9] ARRAY (anon) type_id=8 index_type_id=10 nr_elems=4
  [10] INT __ARRAY_SIZE_TYPE__ size=4 bits_offset=0 nr_bits=32 encoding=(none)
  [11] VAR _license type_id=9 linkage=1
  [12] DATASEC license size=0 vlen=1 size == 0

  ./udpgso_bench_rx: poll: 0x0 expected 0x1

  ./udpgso_bench_rx: poll: 0x0 expected 0x1

  failed
  $ echo $?
  0

  [Fix]
  * 3503ee6c0bec5f ("selftests: fix the return value for UDP GRO test")

  We have this test since Focal.
  This patch can be cherry-picked into all the affected kernels.

  [Test]
  Run this test with:
    sudo ./udpgro.sh

  And check its final return value with:
    echo $?

  If there is any failure, the return value should not be 0.

  [Where problems could occur]
  If this fix is incorrect it might affect the test execution, but it
  should be fine as this is just affecting the test tool. Also, with
  this patch, we are expecting to see this test case to fail until
  bug 1908501 got fixed.

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