Offset is bigger than the size of data to read in ReadFile

[Thomas-Giaroli]

Hello, i have a new problem with my dokan-dotnet based software. I have no idea how this is possible but when opening files, rarely, my offset will end up being bigger than the data i have to read, leaving me with a negative value affected to bytesRead, and of course, throwing an error on my call to Array.copy.

Here is a gist with my readFile function, i have no idea if any other parts of my code would help so don't hesitate to ask me for more :

https://gist.github.com/Thomas-Giaroli/6c1553cce846ff2c5c43b2a4a7b1d026

Thanks already :)

[Liryna]

The offset is the start where to read and the length is how much data from this offset to read. You cannot end up with a negative value.

Please look at the native memfs implementation.

[Thomas-Giaroli]

I know about the offset and the purpose it serves, it never gets a negative value, but it still gets bigger than my data, which ends up making my bytesRead negative. I have no idea why this happens.

As you can see on this screenshot offset is bigger than "arr", which is my data to read in a byte array.

Resulting in this error :

[Liryna]

Oh I see. In this case, there is a specific error code. You should be able to find it in the memfs sample code.