selftests/bpf: Fix flakiness of task_local_storage/sys_enter_exit

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The test_sys_enter_exit test was setting target_pid before attaching
the BPF programs, which causes syscalls made during the attach phase
to be counted. This is flaky because, apparently, there is no
guarantee that both on_enter and on_exit will trigger during the
attachment.

Move the target_pid assignment to after task_local_storage__attach()
so that only explicit sys_gettid() calls are counted.

Reported-by: BPF CI Bot (Claude Opus 4.6) <bot+bpf-ci@kernel.org>
Closes: https://github.com/kernel-patches/vmtest/issues/448
Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Link: https://lore.kernel.org/r/20260224211202.214325-1-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Ihor Solodrai 2026-02-24 13:12:02 -08:00 • committed by Alexei Starovoitov

parent e4094d56c5

commit c89b50cc6b

1 changed files with 11 additions and 5 deletions

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tools/testing/selftests/bpf/prog_tests/task_local_storage.c

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