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selftests/bpf: Add test for freplace program with write access
This adds a selftest that tests the behavior when a freplace target program attempts to make a write access on a packet. The expectation is that the read or write access is granted based on the program type of the linked program and not itself (which is of type, for e.g., BPF_PROG_TYPE_EXT). This test fails without the associated patch on the verifier. Signed-off-by: Udip Pant <udippant@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200825232003.2877030-3-udippant@fb.com
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Udip Pant
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Alexei Starovoitov
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Aug 26, 2020
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