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selftests/bpf: add tests for recent bugfixes
These tests should cover the following cases: - MOV with both zero-extended and sign-extended immediates - implicit truncation of register contents via ALU32/MOV32 - implicit 32-bit truncation of ALU32 output - oversized register source operand for ALU32 shift - right-shift of a number that could be positive or negative - map access where adding the operation size to the offset causes signed 32-bit overflow - direct stack access at a ~4GiB offset Also remove the F_LOAD_WITH_STRICT_ALIGNMENT flag from a bunch of tests that should fail independent of what flags userspace passes. Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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