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ci: disable a number of selftest causing CI for LATEST kernel

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All tests disabled in this commit pass on main kernel CI and fail or
flip/flop on libbpf CI. Failures do not seem to be related to libbpf.
It appears that common theme for all failing tests is that hardware
perf events are not delivered as expected on github CI worker
machines.

Examples of failed CI runs:
- https://github.com/libbpf/libbpf/actions/runs/6961182067
- https://github.com/libbpf/libbpf/actions/runs/6961088131

Fails with the following log:

  test_send_signal_common:FAIL:incorrect result \
    unexpected incorrect result: actual 48 != expected 50

Test mode of operation:
- fork'
- child:
  - install handler for SIGUSR1;
  - send ready message to parent;
  - wait for SIGUSR1 in busy loop;
  - send message '2' (50) to parent if SIGUSR1 occured;
  - send message '0' (48) to parent if no SIGUSR1 occured.
- parent:
  - wait for ready message from child;
  - install perf_event or tracepoint bpf program that uses
    bpf_send_signal() to send SIGUSR1;
  - wait for message '0' or '2' from child, '2' is expected for test
    success.

It appears that perf event that should be triggered by parent never
happens, thus message 48 is received by parent and test fails.

Fails with the following log:

  test_and_reset_skel:FAIL:found_vm_exec \
    unexpected found_vm_exec: actual 0 != expected 1

Such log is printed if variables set from BPF program are not set
after some timeout. The program that should set the variable is
SEC("perf_event") int handle_pe(void), it appears that it is never run.

Fails with the following log:

  pe_subtest:FAIL:pe_res1 unexpected pe_res1: actual 0 != expected 1048576

Variable pe_res1 should be triggered by program
SEC("perf_event") int handle_pe(struct pt_regs *ctx),
it appears that it is never run.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
This commit is contained in:
Eduard Zingerman
2023-11-21 02:02:36 +02:00
committed by Andrii Nakryiko
parent 93f360cf4b
commit 4161e1f41d
1 changed files with 4 additions and 0 deletions
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ci/vmtest/configs/DENYLIST-latest
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@@ -3,3 +3,7 @@ empty_skb # waiting the fix in bpf tree to make it to bpf-next
bpf_nf/tc-bpf-ct # test consistently failing on x86: https://github.com/libbpf/libbpf/pull/698#issuecomment-1590341200
bpf_nf/xdp-ct # test consistently failing on x86: https://github.com/libbpf/libbpf/pull/698#issuecomment-1590341200
kprobe_multi_bench_attach # suspected to cause crashes in CI
find_vma # test consistently fails on latest kernel, see https://github.com/libbpf/libbpf/issues/754 for details
bpf_cookie/perf_event
send_signal/send_signal_nmi
send_signal/send_signal_nmi_thread