Fix unlocked flying_transfers list access

diff --git a/libusb/io.c b/libusb/io.c
index 1d3cdd3..9cea4df 100644 (file)
--- a/libusb/io.c
+++ b/libusb/io.c
@@ -633,8 +633,11 @@ static int submit_transfer(struct usbi_transfer *itransfer)
        
        add_to_flying_list(itransfer);
        r = usbi_backend->submit_transfer(itransfer);
-       if (r < 0)
+       if (r < 0) {
+               pthread_mutex_lock(&flying_transfers_lock);
                list_del(&itransfer->list);
+               pthread_mutex_unlock(&flying_transfers_lock);
+       }
 
        return r;
 }