bpf: Allow bpf_d_path in bpf_iter program

task_file and task_vma iter programs have access to file->f_path. Enable bpf_d_path to print paths of these file. Signed-off-by: Song Liu <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Acked-by: Yonghong Song <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
mrcsosa · Feb 12, 2021 · 3d06f34 · 3d06f34
1 parent 3a7b35b
commit 3d06f34
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
@@ -1191,6 +1191,10 @@ BTF_SET_END(btf_allowlist_d_path)
 
 static bool bpf_d_path_allowed(const struct bpf_prog *prog)
 {
+	if (prog->type == BPF_PROG_TYPE_TRACING &&
+	    prog->expected_attach_type == BPF_TRACE_ITER)
+		return true;
+
 	if (prog->type == BPF_PROG_TYPE_LSM)
 		return bpf_lsm_is_sleepable_hook(prog->aux->attach_btf_id);