Attempted to read or write protected memory. This is often an indication that other memory is corrupt

[tariqgitspace]

I am getting "Attempted to read or write protected memory. This is often an indication that other memory is corrupt" when trying to get imagehandle (heif_context_get_primary_image_handle). heif_context_alloc and heif_context_read_from_file are fine.

Code: IntPtr ctx = heif_context_alloc(); Heif_error fileReadError = heif_context_read_from_file(ctx, filepath, IntPtr.Zero); IntPtr imageHandle; var getHandleErr = heif_context_get_primary_image_handle(ctx, out IntPtr imageHandle);

I compiled the binaries using "vcpkg.exe install libheif" and then using generated - heif.dll, libde265.dll and libx265.dll from folder ..\installed\x64-windows\bin

This is from dependency manager:

Stack Trace: Fatal error. System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. Repeat 2 times:

at Temp.heif_context_get_primary_image_handle(IntPtr, IntPtr ByRef)

at Temp+<ThumbnailUsingLibHeif>d__51.MoveNext() at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]](System.__Canon ByRef) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]](System.__Canon ByRef) at Temp.ThumbnailUsingLibHeif(System.IO.Stream, System.String) at mainClass+<callAsyncMain>d__5.MoveNext() at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1+AsyncStateMachineBox1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ExecutionContextCallback(System.Object) at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1+AsyncStateMachineBox1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].MoveNext(System.Threading.Thread) at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1+AsyncStateMachineBox1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].MoveNext() at System.Runtime.CompilerServices.TaskAwaiter+<>c.<OutputWaitEtwEvents>b__12_0(System.Action, System.Threading.Tasks.Task) at System.Runtime.CompilerServices.AsyncMethodBuilderCore+ContinuationWrapper.Invoke() at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action, Boolean) at System.Threading.Tasks.Task.RunContinuations(System.Object) at System.Threading.Tasks.Task.FinishContinuations() at System.Threading.Tasks.Task1[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TrySetResult(System.__Canon) at System.Threading.Tasks.UnwrapPromise1[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TrySetFromTask(System.Threading.Tasks.Task, Boolean) at System.Threading.Tasks.UnwrapPromise1[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ProcessInnerTask(System.Threading.Tasks.Task) at System.Threading.Tasks.UnwrapPromise1[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ProcessCompletedOuterTask(System.Threading.Tasks.Task) at System.Threading.Tasks.UnwrapPromise`1[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Invoke(System.Threading.Tasks.Task) at System.Threading.Tasks.Task.RunOrQueueCompletionAction(System.Threading.Tasks.ITaskCompletionAction, Boolean) at System.Threading.Tasks.Task.RunContinuations(System.Object) at System.Threading.Tasks.Task.FinishContinuations() at System.Threading.Tasks.Task.FinishStageThree() at System.Threading.Tasks.Task.FinishStageTwo() at System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef, System.Threading.Thread) at System.Threading.Tasks.Task.ExecuteEntryUnsafe(System.Threading.Thread) at System.Threading.Tasks.Task.ExecuteFromThreadPool(System.Threading.Thread) at System.Threading.ThreadPoolWorkQueue.Dispatch() at System.Threading.PortableThreadPool+WorkerThread.WorkerThreadStart() at System.Threading.Thread.StartCallback()

[farindk]

Does this only happen for a specific input file? If yes, please attach the file so that we can reproduce the issue.

[tariqgitspace]

Thanks @farindk. I see issue with all files I tried. Attaching couple of them

sample1.zip

Also, this is the code snippet

[farindk]

It seems that the error is in your code (is that C# ?). You are passing an uninitialized imageHandle pointer as second parameter. However, this has to point to a heif_image_handle pointer variable that this function will write to.

I don't know C#, but this is the C code for it:

// get a handle to the primary image
heif_image_handle* handle;
heif_context_get_primary_image_handle(ctx, &handle);

The second parameter is a valid pointer to an (uninitialized) pointer variable.

[tariqgitspace]

@farindk: Yes, its C#. Also, heif_image_handle is an out argument and need not be explicitly initialized. Would help to reopen issue. I dont have permission for same

[farindk]

Maybe someone else with C# experience can help.

[farindk]

Or maybe have a look here: https://github.com/0xC0000054/libheif-sharp/blob/7f45f0aab812fbdc5d691adcd28a3ecc7db859c0/src/HeifContext.cs#L936