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libpayload: find source of input characters

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This change makes it possible for vboot to avoid an
exploit that could cause involuntary switch to dev mode.
It gives depthcharge/vboot some information on the
type of input device that generated a key.

BUG=chrome-os-partner:21729
TEST=manually tested for panther
BRANCH=none
CQ-DEPEND=CL:182420,CL:182241,CL:182946

Change-Id: I87bdac34bfc50f3adb0b35a2c57a8f95f4fbc35b
Reviewed-on: https://chromium-review.googlesource.com/182357
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Tested-by: Luigi Semenzato <semenzato@chromium.org>
Commit-Queue: Luigi Semenzato <semenzato@chromium.org>
This commit is contained in:
Luigi Semenzato 2014-01-13 17:45:54 -08:00 • committed by chrome-internal-fetch
commit bdb76c8bbc
5 changed files with 21 additions and 3 deletions
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3
payloads/libpayload/drivers/usb/usbhid.c
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@ -391,7 +391,8 @@ usb_hid_set_protocol (usbdev_t *dev, interface_descriptor_t *interface, hid_prot
static struct console_input_driver cons = {
.havekey = usbhid_havechar,
.getchar = usbhid_getchar
.getchar = usbhid_getchar,
.input_type = CONSOLE_INPUT_TYPE_USB,
};