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[ Upstream commit 96daa9874211d5497aa70fa409b67afc29f0cb86 ] Get and check data_fd. It should not check map_fd again. Meanwhile, correct some 'return' to 'goto out'. Thank the suggestion from Maciej in "bpf, x64: Fix tailcall infinite loop"[0] discussions. [0] https://lore.kernel.org/bpf/e496aef8-1f80-0f8e-dcdd-25a8c300319a@gmail.com/T/#m7d3b601066ba66400d436b7e7579b2df4a101033 Fixes:79d49ba048("bpf, testing: Add various tail call test cases") Fixes:3b03791111("selftests/bpf: Add tailcall_bpf2bpf tests") Fixes:5e0b0a4c52("selftests/bpf: Test tail call counting with bpf2bpf and data on stack") Signed-off-by: Leon Hwang <hffilwlqm@gmail.com> Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Link: https://lore.kernel.org/r/20230906154256.95461-1-hffilwlqm@gmail.com Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>