[compiler-rt] [msan] Mark allocator padding as uninitialized, with new origin tag (PR #157187)

[Thurston Dang via llvm-commits]

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@@ -247,7 +269,7 @@ void __msan::MsanDeallocate(BufferedStackTrace *stack, void *p) {
   RunFreeHooks(p);
 
   Metadata *meta = reinterpret_cast<Metadata *>(allocator.GetMetaData(p));
-  uptr size = meta->requested_size;
+  uptr size = allocator.GetActuallyAllocatedSize(p);
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thurstond wrote:

Done

https://github.com/llvm/llvm-project/pull/157187