|
|
You're in the
dotnet framework
group:AccessViolationException from OSSOCK.recv when using WebRequest
dotnet framework:
Hi,
I have some extremely simple code using WebRequest (isolated from a larger application): static void Main() { WebRequest w = WebRequest.Create("http:// www.google.com"); // Works //WebRequest w = WebRequest.Create(@"http:// finance.yahoo.com"); // Does not work w.BeginGetResponse( delegate(IAsyncResult ar) { try { //Console.WriteLine("Beginning to get the response"); // Works if I insert this line WebResponse r = w.EndGetResponse(ar); Console.WriteLine(new StreamReader(r.GetResponseStream()).ReadToEnd()); } catch (Exception x) { Console.WriteLine(x.ToString()); } }, null); Thread.Sleep(Timeout.Infinite); } However, when I run the code as shown above (with or without Visual Studio attached, in both Debug and Release mode) I get the following exception message printed to the console: System.IO.IOException: Unable to read data from the transport connection: Attemp ted to read or write protected memory. This is often an indication that other me mory is corrupt.. ---> System.AccessViolationException: Attempted to read or wri te protected memory. This is often an indication that other memory is corrupt. at System.Net.UnsafeNclNativeMethods.OSSOCK.recv(IntPtr socketHandle, Byte* p innedBuffer, Int32 len, SocketFlags socketFlags) at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, SocketError& errorCode) at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags) at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 s ize) --- End of inner exception stack trace --- at System.Net.ConnectStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.IO.StreamReader.ReadBuffer() at System.IO.StreamReader.ReadToEnd() at DownloadTester.Program.<>c__DisplayClass1.<Main>b__0(IAsyncResult ar) As the comments suggest, this same code works fine for retrieving a page from Google or if I write something to the console before using the response stream in the anonymous delegate! This is an extremely puzzling result. Can anyone shed some light on this problem? Thanks in advance, Max
I have traced this problem to the imon.dll component of the NOD32
Antivirus suite (specifically, version 2.7 with internet filter version 1.002 build 1013) and will be filing a bug report with them. The full stack trace at the point of failure is: ntdll.dll!_KiFastSystemCallRet@0() ntdll.dll!_NtWaitForSingleObject@12() + 0xc bytes kernel32.dll!_WaitForSingleObjectEx@12() + 0x84 bytes ntdll.dll!ExecuteHandler2@20() + 0x26 bytes ntdll.dll!ExecuteHandler@20() + 0x24 bytes [quoted text, click to view] > ntdll.dll!_KiUserExceptionDispatcher@8() + 0xf bytes imon.dll!20b2472a()[Frames below may be incorrect and/or missing, no symbols loaded for imon.dll] imon.dll!20b20bca() imon.dll!20b06e21() imon.dll!20b23afa() imon.dll!20b23afa() imon.dll!20b239f1() imon.dll!20b239f1() imon.dll!20b239de() imon.dll!20b24d79() kernel32.dll!_MultiByteToWideChar@24() + 0x76 bytes imon.dll!20b19418() imon.dll!20b212ae() imon.dll!20b0602a() [Managed to Native Transition] System.dll!System.Net.Sockets.Socket.Receive(byte[] buffer = {Dimensions:[2]}, int offset = 0, int size, System.Net.Sockets.SocketFlags socketFlags = None, out System.Net.Sockets.SocketError errorCode = Success) + 0x139 bytes System.dll!System.Net.Sockets.Socket.Receive(byte[] buffer, int offset, int size, System.Net.Sockets.SocketFlags socketFlags) + 0x1d bytes System.dll!System.Net.Sockets.NetworkStream.Read(byte[] buffer, int offset, int size) + 0x78 bytes System.dll!System.Net.PooledStream.Read(byte[] buffer, int offset, int size) + 0x16 bytes System.dll!System.Net.ConnectStream.ReadSingleByte() + 0x45 bytes System.dll!System.Net.StreamChunkBytes.NextByte.get() + 0x1b bytes System.dll! System.Net.ChunkParse.GetChunkSize(System.Net.IReadChunkBytes Source = {System.Net.StreamChunkBytes}, out int chunkSize = 0) + 0x80 bytes System.dll! System.Net.ConnectStream.ProcessReadChunkedSize(System.Net.StreamChunkBytes ReadByteBuffer = {System.Net.StreamChunkBytes}) + 0x18 bytes System.dll!System.Net.ConnectStream.ReadChunkedSync(byte[] buffer = {Dimensions:[1024]}, int offset = 0, int size = 1024) + 0x52 bytes System.dll!System.Net.ConnectStream.ReadWithoutValidation(byte[] buffer, int offset, int size, bool abortOnError = true) + 0x58 bytes System.dll!System.Net.ConnectStream.Read(byte[] buffer = {Dimensions: [1024]}, int offset = 0, int size) + 0x134 bytes DownloadTester.exe! DownloadTester.Program.Main.AnonymousMethod(System.IAsyncResult ar = {System.Net.ContextAwareResult}) Line 29 + 0x16 bytes C# System.dll!System.Net.LazyAsyncResult.Complete(System.IntPtr userToken) + 0x8c bytes System.dll!System.Net.ContextAwareResult.CompleteCallback(object state) + 0x1a bytes mscorlib.dll! System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x81 bytes System.dll!System.Net.ContextAwareResult.Complete(System.IntPtr userToken) + 0xa7 bytes System.dll!System.Net.LazyAsyncResult.ProtectedInvokeCallback(object result, System.IntPtr userToken) + 0x77 bytes System.dll!System.Net.HttpWebRequest.ProcessResponse() + 0xe1 bytes System.dll! System.Net.HttpWebRequest.SetResponse(System.Net.CoreResponseData coreResponseData) + 0x19b bytes System.dll!System.Net.HttpWebRequest.SetAndOrProcessResponse(object responseOrException) + 0x181 bytes System.dll! System.Net.ConnectionReturnResult.SetResponses(System.Net.ConnectionReturnResult returnResult = {System.Net.ConnectionReturnResult}) + 0x6c bytes System.dll!System.Net.Connection.ReadComplete(int bytesRead, System.Net.WebExceptionStatus errorStatus) + 0x303 bytes System.dll!System.Net.Connection.ReadCallback(System.IAsyncResult asyncResult) + 0xe1 bytes System.dll! System.Net.Connection.ReadCallbackWrapper(System.IAsyncResult asyncResult) + 0x44 bytes System.dll!System.Net.LazyAsyncResult.Complete(System.IntPtr userToken) + 0x8c bytes System.dll!System.Net.ContextAwareResult.Complete(System.IntPtr userToken) + 0x2f bytes System.dll!System.Net.LazyAsyncResult.ProtectedInvokeCallback(object result, System.IntPtr userToken) + 0x77 bytes System.dll! System.Net.Sockets.BaseOverlappedAsyncResult.CompletionPortCallback(uint errorCode, uint numBytes, System.Threading.NativeOverlapped* nativeOverlapped) + 0x10c bytes mscorlib.dll! System.Threading._IOCompletionCallback.PerformIOCompletionCallback(uint errorCode, uint numBytes, System.Threading.NativeOverlapped* pOVERLAP) + 0x7c bytes kernel32.dll!@BaseThreadInitThunk@12() + 0x12 bytes ntdll.dll!__RtlUserThreadStart@8() + 0x27 bytes [quoted text, click to view] On Sep 26, 10:37 pm, Max Bolingbroke <omega.th...@gmail.com> wrote:
> Hi, > > I have some extremely simple code using WebRequest (isolated from a > larger application): > > static void Main() > { > WebRequest w = WebRequest.Create("http://www.google.com"); // Works > //WebRequest w = WebRequest.Create(@"http:// > finance.yahoo.com"); // Does not work > w.BeginGetResponse( > delegate(IAsyncResult ar) > { > try > { > //Console.WriteLine("Beginning to get the > response"); // Works if I insert this line > WebResponse r = w.EndGetResponse(ar); > Console.WriteLine(new > StreamReader(r.GetResponseStream()).ReadToEnd()); > } > catch (Exception x) > { Console.WriteLine(x.ToString()); } > }, null); > > Thread.Sleep(Timeout.Infinite); > } > > However, when I run the code as shown above (with or without Visual > Studio attached, in both Debug and Release mode) I get the following > exception message printed to the console: > System.IO.IOException: Unable to read data from the transport > connection: Attemp > ted to read or write protected memory. This is often an indication > that other me > mory is corrupt.. ---> System.AccessViolationException: Attempted to > read or wri > te protected memory. This is often an indication that other memory is > corrupt. > at System.Net.UnsafeNclNativeMethods.OSSOCK.recv(IntPtr > socketHandle, Byte* p > innedBuffer, Int32 len, SocketFlags socketFlags) > at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, > Int32 size, > SocketFlags socketFlags, SocketError& errorCode) > at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, > Int32 size, > SocketFlags socketFlags) > at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 > offset, Int32 s > ize) > --- End of inner exception stack trace --- > at System.Net.ConnectStream.Read(Byte[] buffer, Int32 offset, Int32 > size) > at System.IO.StreamReader.ReadBuffer()
And ESET have told me that they aren't going to fix it because IMON is
known to be broken :-). I quote their reply below: "" Hello, In our next major release (3.0), we are doing away with IMON after many years and replacing it with two more utilities. In 1992, when NOD32 was introduced, very few programs operated at the Winsock level. Today, in addition to Google and Microsoft, 100's of other developers are creating software in this manner. That would be fine, except for the fact that any app that operates here needs the top spot in the stack, and only one program can have it. As it is now, it can't be enabled at all on a server. IMON was just the first layer of defense, a supplement. The strengths of NOD32 are AMON, which scans every file that performs an action, as it performs that action and the advanced heuristics which is stopping 90%+ of all new threats, before a definition is even written. By quitting IMON now, you'll not only allow both programs to operate together, but you'll also lose no coverage. Thank you, ESET Tech Support "" [quoted text, click to view] On Sep 27, 11:47 am, Max Bolingbroke <omega.th...@gmail.com> wrote:
> I have traced this problem to the imon.dll component of the NOD32 > Antivirus suite (specifically, version 2.7 with internet filter > version 1.002 build 1013) and will be filing a bug report with them. > The full stack trace at the point of failure is: > > ntdll.dll!_KiFastSystemCallRet@0() > ntdll.dll!_NtWaitForSingleObject@12() + 0xc bytes > kernel32.dll!_WaitForSingleObjectEx@12() + 0x84 bytes > ntdll.dll!ExecuteHandler2@20() + 0x26 bytes > ntdll.dll!ExecuteHandler@20() + 0x24 bytes> ntdll.dll!_KiUserExceptionDispatcher@8() + 0xf bytes > > imon.dll!20b2472a() > [Frames below may be incorrect and/or missing, no symbols loaded for > imon.dll] > imon.dll!20b20bca() > imon.dll!20b06e21() > imon.dll!20b23afa() > imon.dll!20b23afa() > imon.dll!20b239f1() > imon.dll!20b239f1() > imon.dll!20b239de() > imon.dll!20b24d79() > kernel32.dll!_MultiByteToWideChar@24() + 0x76 bytes > imon.dll!20b19418() > imon.dll!20b212ae() > imon.dll!20b0602a() > [Managed to Native Transition] > System.dll!System.Net.Sockets.Socket.Receive(byte[] buffer = > {Dimensions:[2]}, int offset = 0, int size, > System.Net.Sockets.SocketFlags socketFlags = None, out > System.Net.Sockets.SocketError errorCode = Success) + 0x139 bytes > System.dll!System.Net.Sockets.Socket.Receive(byte[] buffer, int > offset, int size, System.Net.Sockets.SocketFlags socketFlags) + 0x1d > bytes > System.dll!System.Net.Sockets.NetworkStream.Read(byte[] buffer, int > offset, int size) + 0x78 bytes > System.dll!System.Net.PooledStream.Read(byte[] buffer, int offset, > int size) + 0x16 bytes > System.dll!System.Net.ConnectStream.ReadSingleByte() + 0x45 bytes > System.dll!System.Net.StreamChunkBytes.NextByte.get() + 0x1b bytes > System.dll! > System.Net.ChunkParse.GetChunkSize(System.Net.IReadChunkBytes Source = > {System.Net.StreamChunkBytes}, out int chunkSize = 0) + 0x80 bytes > System.dll! > System.Net.ConnectStream.ProcessReadChunkedSize(System.Net.StreamChunkBytes > ReadByteBuffer = {System.Net.StreamChunkBytes}) + 0x18 bytes > System.dll!System.Net.ConnectStream.ReadChunkedSync(byte[] buffer = > {Dimensions:[1024]}, int offset = 0, int size = 1024) + 0x52 bytes > System.dll!System.Net.ConnectStream.ReadWithoutValidation(byte[] > buffer, int offset, int size, bool abortOnError = true) + 0x58 bytes > System.dll!System.Net.ConnectStream.Read(byte[] buffer = {Dimensions: > [1024]}, int offset = 0, int size) + 0x134 bytes > DownloadTester.exe! > DownloadTester.Program.Main.AnonymousMethod(System.IAsyncResult ar = > {System.Net.ContextAwareResult}) Line 29 + 0x16 bytes C# > System.dll!System.Net.LazyAsyncResult.Complete(System.IntPtr > userToken) + 0x8c bytes > System.dll!System.Net.ContextAwareResult.CompleteCallback(object > state) + 0x1a bytes > mscorlib.dll! > System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext > executionContext, System.Threading.ContextCallback callback, object > state) + 0x81 bytes > System.dll!System.Net.ContextAwareResult.Complete(System.IntPtr > userToken) + 0xa7 bytes > System.dll!System.Net.LazyAsyncResult.ProtectedInvokeCallback(object > result, System.IntPtr userToken) + 0x77 bytes > System.dll!System.Net.HttpWebRequest.ProcessResponse() + 0xe1 bytes > System.dll! > System.Net.HttpWebRequest.SetResponse(System.Net.CoreResponseData > coreResponseData) + 0x19b bytes > System.dll!System.Net.HttpWebRequest.SetAndOrProcessResponse(object > responseOrException) + 0x181 bytes > System.dll! > System.Net.ConnectionReturnResult.SetResponses(System.Net.ConnectionReturnResult > returnResult = {System.Net.ConnectionReturnResult}) + 0x6c bytes > System.dll!System.Net.Connection.ReadComplete(int bytesRead, > System.Net.WebExceptionStatus errorStatus) + 0x303 bytes > System.dll!System.Net.Connection.ReadCallback(System.IAsyncResult > asyncResult) + 0xe1 bytes > System.dll! > System.Net.Connection.ReadCallbackWrapper(System.IAsyncResult > asyncResult) + 0x44 bytes > System.dll!System.Net.LazyAsyncResult.Complete(System.IntPtr > userToken) + 0x8c bytes > System.dll!System.Net.ContextAwareResult.Complete(System.IntPtr > userToken) + 0x2f bytes > System.dll!System.Net.LazyAsyncResult.ProtectedInvokeCallback(object > result, System.IntPtr userToken) + 0x77 bytes > System.dll! > System.Net.Sockets.BaseOverlappedAsyncResult.CompletionPortCallback(uint > errorCode, uint numBytes, System.Threading.NativeOverlapped* > nativeOverlapped) + 0x10c bytes > mscorlib.dll! > System.Threading._IOCompletionCallback.PerformIOCompletionCallback(uint > errorCode, uint numBytes, System.Threading.NativeOverlapped* pOVERLAP) > + 0x7c bytes > kernel32.dll!@BaseThreadInitThunk@12() + 0x12 bytes > ntdll.dll!__RtlUserThreadStart@8() + 0x27 bytes > > On Sep 26, 10:37 pm, Max Bolingbroke <omega.th...@gmail.com> wrote: > > > Hi, > > > I have some extremely simple code using WebRequest (isolated from a > > larger application): > > > static void Main() > > { > > WebRequest w = WebRequest.Create("http://www.google.com"); // Works > > //WebRequest w = WebRequest.Create(@"http:// > > finance.yahoo.com"); // Does not work > > w.BeginGetResponse( > > delegate(IAsyncResult ar) > > { > > try > > {
Don't see what you're looking for? Try a search.
|
June 2003
July 2003
August 2003
September 2003
October 2003
November 2003
December 2003
January 2004
February 2004
March 2004
April 2004
May 2004
June 2004
July 2004
August 2004
September 2004
October 2004
November 2004
December 2004
January 2005
February 2005
March 2005
April 2005
May 2005
June 2005
July 2005
August 2005
September 2005
October 2005
November 2005
December 2005
January 2006
February 2006
March 2006
April 2006
May 2006
June 2006
July 2006
August 2006
September 2006
October 2006
November 2006
December 2006
January 2007
February 2007
March 2007
April 2007
May 2007
June 2007
July 2007
August 2007
September 2007
October 2007
November 2007
December 2007
January 2008
February 2008
March 2008
April 2008
May 2008
June 2008
| home · blog · groups | Questions? Comments? Contact the dn |