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diff -rp -u4 libusb-1.0.19-orig/libusb/descriptor.c libusb-1.0.19/libusb/descriptor.c
--- libusb-1.0.19-orig/libusb/descriptor.c 2015-05-12 00:15:19 +0200
+++ libusb-1.0.19/libusb/descriptor.c 2015-05-12 00:17:09 +0200
@@ -1181,9 +1181,9 @@ 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;
for (di = 0, si = 2; si < tbuf[0]; si += 2) {
if (di >= (length - 1))
break;
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