This series ensures the line_info (passed by the userspace during bpf_prog_load) cannot have its line_info.insn_off pointing to a zero bpf insn code. F.e. a broken userspace tool might generate a line_info.insn_off that points to the second 8 bytes of a BPF_LD_IMM64.
The first patch is the kernel change. The second patch is a new test case. Martin KaFai Lau (2): bpf: Ensure line_info.insn_off cannot point to insn with zero code bpf: Add BPF_LD_IMM64 to the line_info test kernel/bpf/verifier.c | 8 ++++++++ tools/testing/selftests/bpf/test_btf.c | 27 ++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) -- 2.17.1
