selftests/bpf: Test overlapping RCU protection

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Add task kptr tests that keep RCU protection active after a spin or RCU
unlock when preemption or IRQs remain disabled.

Also test the reverse order with explicit RCU. Verify that task kptrs are
rejected after leaving the final preemption-disabled or IRQ-disabled
region.

Signed-off-by: Ning Ding <dingning04@gmail.com>
Link: https://lore.kernel.org/bpf/20260805233940.3966981-3-dingning04@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

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Ning Ding 2026-08-05 16:39:34 -07:00 • committed by Kumar Kartikeya Dwivedi

parent d65739bf93

commit a7f62506df

4 changed files with 204 additions and 0 deletions

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6

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

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2

tools/testing/selftests/bpf/progs/task_kfunc_common.h

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49

tools/testing/selftests/bpf/progs/task_kfunc_failure.c

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147

tools/testing/selftests/bpf/progs/task_kfunc_success.c

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