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f64eb44ce9
Add a consistency subtest to htab_reuse that detects torn writes caused by the BPF_F_LOCK lockless update racing with element reallocation in alloc_htab_elem(). The test uses three thread roles started simultaneously via a pipe: - locked updaters: BPF_F_LOCK|BPF_EXIST in-place updates - delete+update workers: delete then BPF_ANY|BPF_F_LOCK insert - locked readers: BPF_F_LOCK lookup checking value consistency Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com> Link: https://lore.kernel.org/r/20260401-bpf_map_torn_writes-v1-2-782d071c55e7@meta.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>