ChaoMaWisetech opened a new issue, #1158: URL: https://github.com/apache/lucenenet/issues/1158
### Is there an existing issue for this? - [x] I have searched the existing issues ### Describe the bug The readCount might be negative in [ IndexInputStream.Read ] (https://github.com/apache/lucenenet/blob/master/src/Lucene.Net.Replicator/IndexInputInputStream.cs#L66C1-L72C10) and throw exception - Message :Non-negative number required. Parameter name: length - StackTrace: at J2N.IO.MemoryMappedFiles.MemoryMappedViewByteBuffer.Get(Byte[] destination, Int32 offset, Int32 length), at Lucene.Net.Replicator.IndexInputStream.Read(Byte[] buffer, Int32 offset, Int32 count), ``` public override int Read(byte[] buffer, int offset, int count) { int remaining = (int) (input.Length - input.Position); // remaining might be a negative number due to (int) longNum int readCount = Math.Min(remaining, count); // readCount might be a negative number input.ReadBytes(buffer, offset, readCount); return readCount; } ``` a possible fix could be ``` public override int Read(byte[] buffer, int offset, int count) { long remaining = input.Length - input.Position; int readCount = (int)Math.Min(remaining, count); input.ReadBytes(buffer, offset, readCount); return readCount; } ``` ### Expected Behavior _No response_ ### Steps To Reproduce ``` [Test] public void IndexInputStream_ReadIssueWhenInputLengthGreaterThanIntMax() { var mockIndexInput = new Mock<IndexInput>(MockBehavior.Strict, "abc"); mockIndexInput.Setup(x => x.Length).Returns(long.MaxValue).Verifiable(); mockIndexInput.Setup(x => x.Position).Returns(0).Verifiable(); mockIndexInput.Setup(x => x.ReadBytes(It.IsAny<byte[]>(), It.IsAny<int>(), It.Is<int>(v => v < 0))) .Throws(new ArgumentException("length cannot be negative")) .Verifiable(); var indexInputStream = new IndexInputStream(mockIndexInput.Object); Assert.That(() => indexInputStream.Read(new byte[1], 0, 1), Throws.InstanceOf<ArgumentException>()); mockIndexInput.VerifyAll(); } ``` ### Exceptions (if any) _No response_ ### Lucene.NET Version _No response_ ### .NET Version _No response_ ### Operating System _No response_ ### Anything else? _No response_ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@lucenenet.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
