| Message ID | 20190322154425.3852517-26-arnd@arndb.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | candidates from spreadtrum 4.4 product kernel | expand |
On Fri, Mar 22, 2019 at 04:44:16PM +0100, Arnd Bergmann wrote: > From: Andrey Konovalov <andreyknvl@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 <andreyknvl@google.com> > Cc: stable <stable@vger.kernel.org> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > (cherry picked from commit 32fd87b3bbf5f7a045546401dfe2894dbbf4d8c3) > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > drivers/usb/core/config.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) Also added to 4.14.y and 4.9.y
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c index 6a287c81a7be..b8eb289e0b17 100644 --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -734,18 +734,21 @@ 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);