kernel/tools/testing/selftests/bpf/verifier/ld_imm64.c, branch linux-6.2.y

selftests/bpf: Fix test_verifier after introducing resolve_pseudo_ldimm64

2020-10-07T03:16:57Z

Commit 4976b718c355 ("bpf: Introduce pseudo_btf_id") switched the order of check_subprogs() and resolve_pseudo_ldimm() in the verifier. Now an empty prog expects to see the error "last insn is not an the prog of a single invalid ldimm exit or jmp" instead, because the check for subprogs comes first. It's now pointless to validate that half of ldimm64 won't be the last instruction. Tested: # ./test_verifier Summary: 1129 PASSED, 537 SKIPPED, 0 FAILED and the full set of bpf selftests. Fixes: 4976b718c355 ("bpf: Introduce pseudo_btf_id") Signed-off-by: Hao Luo Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20201007022857.2791884-1-haoluo@google.com

bpf: fix replace_map_fd_with_map_ptr's ldimm64 second imm field

2019-03-07T16:47:13Z

Non-zero imm value in the second part of the ldimm64 instruction for BPF_PSEUDO_MAP_FD is invalid, and thus must be rejected. The map fd only ever sits in the first instructions' imm field. None of the BPF loaders known to us are using it, so risk of regression is minimal. For clarity and consistency, the few insn->{src_reg,imm} occurrences are rewritten into insn[0].{src_reg,imm}. Add a test case to the BPF selftest suite as well. Fixes: 0246e64d9a5f ("bpf: handle pseudo BPF_LD_IMM64 insn") Signed-off-by: Daniel Borkmann Acked-by: Song Liu Signed-off-by: Alexei Starovoitov

selftests: bpf: break up test_verifier

2019-01-28T05:37:45Z

Break up the first 10 kLoC of test verifier test cases out into smaller files. Looks like git line counting gets a little flismy above 16 bit integers, so we need two commits to break up test_verifier. Signed-off-by: Jakub Kicinski Acked-by: Jiong Wang Signed-off-by: Alexei Starovoitov