From: Andrey Konovalov <andreyk...@google.com>
When cleaning up the configurations, make sure we only free the number
of configurations and interfaces that we could have allocated.
Reported-by: Andrey Konovalov <andreyk...@google.com>
Cc: stable <sta...@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index 55b198ba629b..93b38471754e 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -764,18 +764,21 @@ void usb_destroy_configuration(struct usb_device *dev)
return;
if (dev->rawdescriptors) {
- for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
+ for (i = 0; i < dev->descriptor.bNumConfigurations &&
+ i < USB_MAXCONFIG; i++)
kfree(dev->rawdescriptors[i]);
kfree(dev->rawdescriptors);
dev->rawdescriptors = NULL;
}
- for (c = 0; c < dev->descriptor.bNumConfigurations; c++) {
+ for (c = 0; c < dev->descriptor.bNumConfigurations &&
+ c < USB_MAXCONFIG; c++) {
struct usb_host_config *cf = &dev->config[c];
kfree(cf->string);
- for (i = 0; i < cf->desc.bNumInterfaces; i++) {
+ for (i = 0; i < cf->desc.bNumInterfaces &&
+ i < USB_MAXINTERFACES; i++) {
if (cf->intf_cache[i])
kref_put(&cf->intf_cache[i]->ref,
usb_release_interface_cache);
--
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