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usb: kbd: Prevent out of bound access 

Scan code 0x39 is CapsLock, which is not a printable character and thus
is not covered by either usb_kbd_numkey_shifted[] or usb_kbd_numkey[].
Fix the scan code check to avoid looking it up in either of the arrays.

Signed-off-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Marek Vasut 2016-01-25 22:00:44 +01:00
parent 4feefdcfe9
commit bdbcbe752e
1 changed files with 1 additions and 1 deletions
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2
common/usb_kbd.c
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@ -199,7 +199,7 @@ static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
}
}
if ((scancode > 0x1d) && (scancode < 0x3a)) {
if ((scancode > 0x1d) && (scancode < 0x39)) {
/* Shift pressed */
if (modifier & (LEFT_SHIFT | RIGHT_SHIFT))
keycode = usb_kbd_numkey_shifted[scancode - 0x1e];