selftests/bpf: Add unit tests for pointers in global functions

2021-02-13T01:37:23Z

test_global_func9 - check valid pointer's scenarios test_global_func10 - check that a smaller type cannot be passed as a larger one test_global_func11 - check that CTX pointer cannot be passed test_global_func12 - check access to a null pointer test_global_func13 - check access to an arbitrary pointer value test_global_func14 - check that an opaque pointer cannot be passed test_global_func15 - check that a variable has an unknown value after it was passed to a global function by pointer test_global_func16 - check access to uninitialized stack memory test_global_func_args - check read and write operations through a pointer Signed-off-by: Dmitrii Banshchikov Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20210212205642.620788-5-me@ubique.spb.ru

kernel/tools/testing/selftests/bpf/progs/test_global_func16.c, branch linux-6.2.y

selftests/bpf: Add unit tests for pointers in global functions