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[ Upstream commit4236f114a3] During the xdp_adjust_tail test, probabilistic failure occurs and SKB package is discarded by the kernel. After checking the issues by tracking SKB package, it is identified that they were caused by checksum errors. Refer to checksum of the arch/arm64/include/asm/checksum.h for fixing. v2: Based on Alexei Starovoitov's suggestions, it is necessary to keep the code implementation consistent. Fixes:c6ffd1ff78(bpf: add bpf_xdp_adjust_tail sample prog) Signed-off-by: Yuan Chen <chenyuan@kylinos.cn> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240930024115.52841-1-chenyuan_fl@163.com Signed-off-by: Sasha Levin <sashal@kernel.org>