Fix bugs found through fuzzing

2024-05-19 20:08:27 -07:00
parent e23f11c1f0
commit 89c6aae53a
2 changed files with 14 additions and 7 deletions
--- a/VersionedMap.cpp
+++ b/VersionedMap.cpp
@@ -653,7 +653,14 @@ struct __attribute__((__visibility__("hidden"))) VersionedMap::Impl {
      rangeVersion = latestVersion;
      if (inserted) {
        val = {nullptr, -1}; // Sentinel for "no point mutation here"
-        pointVersion = -1;   // Sentinel for "no point mutation here"
+        Finger copy;
+        finger.copyTo(copy);
+        move<std::memory_order_relaxed>(copy, latestVersion, true);
+        if (copy.searchPathSize() == 0) {
+          pointVersion = -1; // Sentinel for "no mutation ending here"
+        } else {
+          pointVersion = mm.base[copy.backNode()].entry->rangeVersion;
+        }
      } else {
        auto *entry = mm.base[finger.backNode()].entry;
        val = {entry->getVal(), entry->valLen};