canonical-ubuntu-qa team mailing list archive

[Andrei Gherzan <2023680@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Some of the test_verifier tests from ubuntu_bpf fail:

#192/p bpf_get_task_stack return R0 range is refined FAIL
Failed to load prog 'Permission denied'!
func 'bpf_iter_task' arg0 has btf_id 26598 type STRUCT 'bpf_iter_meta'
cannot access ptr member buf with moff 0 in struct seq_file with off 0 size 1
R1 is of type seq_file but seq_file is expected
verification time 1202 usec
stack depth 8
processed 27 insns (limit 1000000) max_states_per_insn 0 total_states 2 peak_states 2 mark_read 2

#467/p d_path accept FAIL
Failed to load prog 'Permission denied'!
func 'dentry_open' arg0 has btf_id 10498 type STRUCT 'path'
cannot access ptr member mnt with moff 0 in struct path with off 0 size 1
R1 is of type path but path is expected
verification time 1198 usec
stack depth 8
processed 7 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0

#990/p reference tracking: bpf_sk_release(btf_tcp_sock) FAIL
Failed to load prog 'Permission denied'!
R1 is of type tcp_sock but sock_common is expected
verification time 965 usec
stack depth 48
processed 24 insns (limit 1000000) max_states_per_insn 0 total_states 1 peak_states 1 mark_read 1

This was observed on an AWS instance while testing Lunar linux-aws
(6.2.0-1005.5):

SRU Cycle:	2023.05.15
Series:	lunar
Package:	linux-aws
Version:	6.2.0-1005.5
Cloud:	aws
Instance:	c6g.8xlarge
Region:	us-west-1
Operation:	sru

It only affects the c6g.8xlarge instance type from the instances picked
up for the 2023.05.15 cycle.

** Affects: ubuntu-kernel-tests
     Importance: Undecided
         Status: New


** Tags: aws sru-20230515

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https://bugs.launchpad.net/bugs/2023680

Title:
  test_verifier in ubuntu_bpf fails - Permission denied

Status in ubuntu-kernel-tests:
  New

Bug description:
  Some of the test_verifier tests from ubuntu_bpf fail:

  #192/p bpf_get_task_stack return R0 range is refined FAIL
  Failed to load prog 'Permission denied'!
  func 'bpf_iter_task' arg0 has btf_id 26598 type STRUCT 'bpf_iter_meta'
  cannot access ptr member buf with moff 0 in struct seq_file with off 0 size 1
  R1 is of type seq_file but seq_file is expected
  verification time 1202 usec
  stack depth 8
  processed 27 insns (limit 1000000) max_states_per_insn 0 total_states 2 peak_states 2 mark_read 2

  #467/p d_path accept FAIL
  Failed to load prog 'Permission denied'!
  func 'dentry_open' arg0 has btf_id 10498 type STRUCT 'path'
  cannot access ptr member mnt with moff 0 in struct path with off 0 size 1
  R1 is of type path but path is expected
  verification time 1198 usec
  stack depth 8
  processed 7 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0

  #990/p reference tracking: bpf_sk_release(btf_tcp_sock) FAIL
  Failed to load prog 'Permission denied'!
  R1 is of type tcp_sock but sock_common is expected
  verification time 965 usec
  stack depth 48
  processed 24 insns (limit 1000000) max_states_per_insn 0 total_states 1 peak_states 1 mark_read 1

  This was observed on an AWS instance while testing Lunar linux-aws
  (6.2.0-1005.5):

  SRU Cycle:	2023.05.15
  Series:	lunar
  Package:	linux-aws
  Version:	6.2.0-1005.5
  Cloud:	aws
  Instance:	c6g.8xlarge
  Region:	us-west-1
  Operation:	sru

  It only affects the c6g.8xlarge instance type from the instances
  picked up for the 2023.05.15 cycle.

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