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diff -rpu4 libusb-1.0.22.orig/libusb/descriptor.c libusb-1.0.22/libusb/descriptor.c
--- libusb-1.0.22.orig/libusb/descriptor.c 2018-03-17 08:23:37.000000000 +0100
+++ libusb-1.0.22/libusb/descriptor.c 2018-03-29 10:36:09.968429473 +0200
@@ -1173,9 +1173,9 @@ int API_EXPORTED libusb_get_string_descr
if (tbuf[1] != LIBUSB_DT_STRING)
return LIBUSB_ERROR_IO;
if (tbuf[0] > r)
- return LIBUSB_ERROR_IO;
+ tbuf[0] = r;
di = 0;
for (si = 2; si < tbuf[0]; si += 2) {
if (di >= (length - 1))
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