perf: fix nil pointer when perf map create failed

Signed-off-by: cfc4n <cfc4n.cs@gmail.com>
cilium · Dec 22, 2023 · b91d2a9 · b91d2a9
1 parent 5ab7746
commit b91d2a9
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/perf/reader.go b/perf/reader.go
@@ -231,11 +231,12 @@ func NewReaderWithOptions(array *ebpf.Map, perCPUBuffer int, opts ReaderOptions)
 			pauseFds = append(pauseFds, -1)
 			continue
 		}
-		bufferSize = ring.size()
 
 		if err != nil {
 			return nil, fmt.Errorf("failed to create perf ring for CPU %d: %v", i, err)
 		}
+
+		bufferSize = ring.size()
 		rings = append(rings, ring)
 		pauseFds = append(pauseFds, ring.fd)