1a0ca1019d
Fixes found by fuzzer: OnDiskTrieRawHashMap: - Bounds-check data slot offsets in TrieVerifier::visitSlot() before calling getRecord(), preventing asData() assertion on out-of-bounds trie entries. - Validate subtrie headers (NumBits, bounds) before constructing SubtrieHandle, preventing SEGV in getSlots() from corrupt NumBits. - Validate arena bump pointer alignment, catching misaligned BumpPtr that would crash store() with an alignment assertion. - Fix comma operator bug in getOrCreateRoot() where the compare_exchange_strong result was discarded, causing asSubtrie() assertion when RootTrieOffset was corrupted to zero. OnDiskGraphDB: - Reject invalid (zero) ref offsets in validate callback, preventing asData() assertion when corrupt data pool refs are resolved via recoverFromFileOffset(). - Validate DataRecordHandle layout flags before calling getTotalSize(), preventing llvm_unreachable on corrupt NumRefsFlags/DataSizeFlags. - Validate data pool bump pointer alignment, catching misaligned BumpPtr that would crash store() in DataRecordHandle::constructImpl(). - Check data record refs offset alignment before calling getRefs(), preventing PointerUnion assertion from misaligned refs pointer. MappedFileRegionArena: - Convert assertions in initializeHeader() to errors so corrupted arena headers return an error on CAS open instead of crashing. Assisted-By: Claude
The LLVM Compiler Infrastructure
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