From 08e993dde3c902d13203b7855783c772b6612436 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9s=20Medina?= <andres.medina@redcanary.com>
Date: Thu, 18 May 2023 20:32:40 -0700
Subject: [PATCH] do not attempt to load a BTF object that has no types

---
 aya-obj/src/btf/btf.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/aya-obj/src/btf/btf.rs b/aya-obj/src/btf/btf.rs
index fd24d93d..93c57cf5 100644
--- a/aya-obj/src/btf/btf.rs
+++ b/aya-obj/src/btf/btf.rs
@@ -210,6 +210,11 @@ impl Btf {
         }
     }
 
+    pub(crate) fn is_empty(&self) -> bool {
+        // the first one is awlays BtfType::Unknown
+        self.types.types.len() < 2
+    }
+
     pub(crate) fn types(&self) -> impl Iterator<Item = &BtfType> {
         self.types.types.iter()
     }
@@ -628,7 +633,10 @@ impl Object {
         &mut self,
         features: &BtfFeatures,
     ) -> Result<Option<&Btf>, BtfError> {
-        if let Some(ref mut obj_btf) = self.btf {
+        if let Some(ref mut obj_btf) = &mut self.btf {
+            if obj_btf.is_empty() {
+                return Ok(None);
+            }
             // fixup btf
             obj_btf.fixup_and_sanitize(
                 &self.section_sizes,