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Age	Commit message (Collapse)	Author	Files	Lines
2025-06-11	selftests/bpf: Fix cgroup_mprog_ordering failure due to uninitialized variable	Yonghong Song	1	-1/+1
	On arm64, the cgroup_mprog_ordering selftest failed with test_progs run when building with clang compiler. The reason is due to socklen_t optlen not initialized. In kernel function do_ip_getsockopt(), we have if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; if (len < 0) return -EINVAL; The above 'len' variable is a negative value and hence the test failed. But the test is okay on x86_64. I checked the x86_64 asm code and I didn't see explicit initialization of 'optlen' but its value is 0 so kernel didn't return error. This should be a pure luck. Fix the bug by initializing 'oplen' var properly. Fixes: e422d5f118e4 ("selftests/bpf: Add two selftests for mprog API based cgroup progs") Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20250611162103.1623692-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-06-09	selftests/bpf: Add two selftests for mprog API based cgroup progs	Yonghong Song	1	-0/+77
	Two tests are added: - cgroup_mprog_opts, which mimics tc_opts.c ([1]). Both prog and link attach are tested. Some negative tests are also included. - cgroup_mprog_ordering, which actually runs the program with some mprog API flags. [1] https://github.com/torvalds/linux/blob/master/tools/testing/selftests/bpf/prog_tests/tc_opts.c Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20250606163156.2429955-1-yonghong.song@linux.dev