core/state/snapshot: fix race condition

ethereum · Apr 12, 2022 · ea16199 · ea16199
1 parent 1e973a9
commit ea16199
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/core/state/snapshot/difflayer.go b/core/state/snapshot/difflayer.go
@@ -258,6 +258,8 @@ func (dl *diffLayer) Root() common.Hash {
 
 // Parent returns the subsequent layer of a diff layer.
 func (dl *diffLayer) Parent() snapshot {
+	dl.lock.RLock()
+	defer dl.lock.RUnlock()
 	return dl.parent
 }