Abhilash437 commented on code in PR #406:
URL: https://github.com/apache/arrow-dotnet/pull/406#discussion_r3804884679
##########
test/Apache.Arrow.Tests/ArrowBufferTests.cs:
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@@ -111,6 +113,26 @@ public void TestExternalMemoryWrappedAsArrowBuffer()
Assert.Equal(10, buffer.Span.CastTo<int>()[2]);
}
+ [Fact]
+ public void TestNativeMemoryManagerUseAfterFree()
+ {
+ var allocator = new PoisonMemoryAllocator();
+ // Allocate using the Builder pattern
+ var builder = new ArrowBuffer.Builder<byte>(100000);
+ builder.Append(new byte[100000]);
+ ArrowBuffer buffer = builder.Build(allocator);
+
+ // Extract the unmanaged Span
+ ReadOnlySpan<byte> span = buffer.Span;
+
+ // Dispose the buffer to trigger memory poisoning and release
+ buffer.Dispose();
+
+ // This will now fail because span[50000] is poisoned with 0xFF
after free instead of 0!
Review Comment:
updated the comment
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