void-packages/srcpkgs/libusb/patches/fix-descriptor-parsing.patch

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--- libusb/os/linux_usbfs.c
+++ libusb/os/linux_usbfs.c
@@ -641,7 +641,12 @@ static int seek_to_next_config(struct libusb_context *ctx,
uint8_t *buffer, size_t len)
{
struct usbi_descriptor_header *header;
- int offset = 0;
+ int offset;
+
+ /* Start seeking past the config descriptor */
+ offset = LIBUSB_DT_CONFIG_SIZE;
+ buffer += LIBUSB_DT_CONFIG_SIZE;
+ len -= LIBUSB_DT_CONFIG_SIZE;
while (len > 0) {
if (len < 2) {
@@ -718,7 +723,7 @@ static int parse_config_descriptors(struct libusb_device *dev)
}
if (priv->sysfs_dir) {
- /*
+ /*
* In sysfs wTotalLength is ignored, instead the kernel returns a
* config descriptor with verified bLength fields, with descriptors
* with an invalid bLength removed.
@@ -727,8 +732,7 @@ static int parse_config_descriptors(struct libusb_device *dev)
int offset;
if (num_configs > 1 && idx < num_configs - 1) {
- offset = seek_to_next_config(ctx, buffer + LIBUSB_DT_CONFIG_SIZE,
- remaining - LIBUSB_DT_CONFIG_SIZE);
+ offset = seek_to_next_config(ctx, buffer, remaining);
if (offset < 0)
return offset;
sysfs_config_len = (uint16_t)offset;