bpf_ctx_narrow_access_offset 1380 kernel/bpf/cgroup.c bpf_ctx_narrow_access_offset( bpf_ctx_narrow_access_offset 1393 kernel/bpf/cgroup.c bpf_ctx_narrow_access_offset( bpf_ctx_narrow_access_offset 8709 kernel/bpf/verifier.c u8 shift = bpf_ctx_narrow_access_offset(