pptp: fix stack info leak in pptp_getname()

[firefly-linux-kernel-4.4.55.git] / drivers / gpio / gpio-mpc8xxx.c

diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index a0b33a216d4a788f4983b71d700350b3fff76d51..2aa3ca215bd614743b3c323d02e0560974958954 100644 (file)
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -69,10 +69,14 @@ static int mpc8572_gpio_get(struct gpio_chip *gc, unsigned int gpio)
        u32 val;
        struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
        struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+       u32 out_mask, out_shadow;
 
-       val = in_be32(mm->regs + GPIO_DAT) & ~in_be32(mm->regs + GPIO_DIR);
+       out_mask = in_be32(mm->regs + GPIO_DIR);
 
-       return (val | mpc8xxx_gc->data) & mpc8xxx_gpio2mask(gpio);
+       val = in_be32(mm->regs + GPIO_DAT) & ~out_mask;
+       out_shadow = mpc8xxx_gc->data & out_mask;
+
+       return (val | out_shadow) & mpc8xxx_gpio2mask(gpio);
 }
 
 static int mpc8xxx_gpio_get(struct gpio_chip *gc, unsigned int gpio)