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Commit69e3a6aa6b("LoongArch: Add checksum optimization for 64-bit system") would cause an undefined shift and an out-of-bounds read. Commit8bd795fedb("arm64: csum: Fix OoB access in IP checksum code for negative lengths") fixes the same issue on ARM64. Fixes:69e3a6aa6b("LoongArch: Add checksum optimization for 64-bit system") Co-developed-by: Wentao Guan <guanwentao@uniontech.com> Signed-off-by: Wentao Guan <guanwentao@uniontech.com> Signed-off-by: Yuli Wang <wangyuli@uniontech.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>