USB: don't read past config->interface[] if usb_control_msg() fails in usb_reset_conf...
authorRoel Kluin <roel.kluin@gmail.com>
Thu, 18 Feb 2010 01:36:23 +0000 (02:36 +0100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 2 Mar 2010 22:55:10 +0000 (14:55 -0800)
commite4a3d94658b5760fc947d7f7185c57db47ca362a
treeae5d66028e48f96545cce0fd7332f2052ea9baa3
parentb6a2f10ca045c9b0a4732c38485ad6ca1b663bf4
USB: don't read past config->interface[] if usb_control_msg() fails in usb_reset_configuration()

While looping over the interfaces, if usb_hcd_alloc_bandwidth() fails it calls
hcd->driver->reset_bandwidth(), so there was no need to reinstate the interface
again.

If no break occurred, the index equals config->desc.bNumInterfaces. A
subsequent usb_control_msg() failure resulted in a read from
config->interface[config->desc.bNumInterfaces] at label reset_old_alts.

In either case the last interface should be skipped.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/message.c