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A string written by the user may not be zero terminated. sscanf may read memory beyond the buffer if no zero byte is found. For testing build with CONFIG_USB_CHIPIDEA=y, CONFIG_USB_CHIPIDEA_DEBUG=y. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Peter Chen <peter.chen@freescale.com>