I have a problem with libusb_interrupt_transfer under cygwin. When I want to
read data from a USB device and there is nothing to receive, I get a
Segmentation fault. I managed to backtrace the fault to
hid_copy_transfer_data() in windows_usb.c, line:
memcpy(transfer_priv->hid_dest, transfer_priv->hid_buffer+1, corrected_size);
The problem starts in windows_usb.c from windows_handle_events() where
GetOverlappedResult(transfer_priv->pollable_fd.handle,
transfer_priv->pollable_fd.overlapped, &io_size, false) sets io_size to 0 and
io_result = ERROR_OPERATION_ABORTED. Because of io_result value, the program
will call function hid_copy_transfer_data() from windows_transfer_callback()
with io_size = 0.
In hid_copy_transfer_data() we have a problem then :
uint32_t corrected_size = io_size; (value is 0).
corrected_size--;
memcpy(transfer_priv->hid_dest, transfer_priv->hid_buffer+1, corrected_size);
---
Reply to this email directly or view it on GitHub:
https://github.com/libusbx/libusbx/issues/160
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