diff --git a/compiler-rt/lib/scudo/standalone/primary32.h b/compiler-rt/lib/scudo/standalone/primary32.h
--- a/compiler-rt/lib/scudo/standalone/primary32.h
+++ b/compiler-rt/lib/scudo/standalone/primary32.h
@@ -737,6 +737,9 @@
         Sci->AllocatedUser -
         (Sci->Stats.PoppedBlocks - Sci->Stats.PushedBlocks) * BlockSize;
 
+    if (UNLIKELY(BytesInFreeList == 0))
+      return 0;
+
     bool MaySkip = false;
 
     if (BytesInFreeList <= Sci->ReleaseInfo.BytesInFreeListAtLastCheckpoint) {
diff --git a/compiler-rt/lib/scudo/standalone/primary64.h b/compiler-rt/lib/scudo/standalone/primary64.h
--- a/compiler-rt/lib/scudo/standalone/primary64.h
+++ b/compiler-rt/lib/scudo/standalone/primary64.h
@@ -845,6 +845,9 @@
         Region->AllocatedUser -
         (Region->Stats.PoppedBlocks - Region->Stats.PushedBlocks) * BlockSize;
 
+    if (UNLIKELY(BytesInFreeList == 0))
+      return 0;
+
     bool MaySkip = false;
 
     // Always update `BytesInFreeListAtLastCheckpoint` with the smallest value