From 62478541f375f2155e8234e3eaf7985b6491f0bd Mon Sep 17 00:00:00 2001 From: Xiao Wang Date: Sun, 25 Sep 2016 17:00:00 +0800 Subject: [PATCH] net/ixgbe/base: add bounds check in LED functions Do parameter check to prevent exceptional value being written into register. Signed-off-by: Xiao Wang Acked-by: Wenzhuo Lu --- drivers/net/ixgbe/base/ixgbe_common.c | 13 +++++++++++++ drivers/net/ixgbe/base/ixgbe_x540.c | 6 ++++++ 2 files changed, 19 insertions(+) diff --git a/drivers/net/ixgbe/base/ixgbe_common.c b/drivers/net/ixgbe/base/ixgbe_common.c index 1c7263dd0e..c01f9196ce 100644 --- a/drivers/net/ixgbe/base/ixgbe_common.c +++ b/drivers/net/ixgbe/base/ixgbe_common.c @@ -1133,6 +1133,9 @@ s32 ixgbe_led_on_generic(struct ixgbe_hw *hw, u32 index) DEBUGFUNC("ixgbe_led_on_generic"); + if (index > 3) + return IXGBE_ERR_PARAM; + /* To turn on the LED, set mode to ON. */ led_reg &= ~IXGBE_LED_MODE_MASK(index); led_reg |= IXGBE_LED_ON << IXGBE_LED_MODE_SHIFT(index); @@ -1153,6 +1156,9 @@ s32 ixgbe_led_off_generic(struct ixgbe_hw *hw, u32 index) DEBUGFUNC("ixgbe_led_off_generic"); + if (index > 3) + return IXGBE_ERR_PARAM; + /* To turn off the LED, set mode to OFF. */ led_reg &= ~IXGBE_LED_MODE_MASK(index); led_reg |= IXGBE_LED_OFF << IXGBE_LED_MODE_SHIFT(index); @@ -3388,6 +3394,9 @@ s32 ixgbe_blink_led_start_generic(struct ixgbe_hw *hw, u32 index) DEBUGFUNC("ixgbe_blink_led_start_generic"); + if (index > 3) + return IXGBE_ERR_PARAM; + /* * Link must be up to auto-blink the LEDs; * Force it if link is down. @@ -3433,6 +3442,10 @@ s32 ixgbe_blink_led_stop_generic(struct ixgbe_hw *hw, u32 index) DEBUGFUNC("ixgbe_blink_led_stop_generic"); + if (index > 3) + return IXGBE_ERR_PARAM; + + ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, &autoc_reg); if (ret_val != IXGBE_SUCCESS) goto out; diff --git a/drivers/net/ixgbe/base/ixgbe_x540.c b/drivers/net/ixgbe/base/ixgbe_x540.c index 31dead0d70..24e9c93ff9 100644 --- a/drivers/net/ixgbe/base/ixgbe_x540.c +++ b/drivers/net/ixgbe/base/ixgbe_x540.c @@ -982,6 +982,9 @@ s32 ixgbe_blink_led_start_X540(struct ixgbe_hw *hw, u32 index) DEBUGFUNC("ixgbe_blink_led_start_X540"); + if (index > 3) + return IXGBE_ERR_PARAM; + /* * Link should be up in order for the blink bit in the LED control * register to work. Force link and speed in the MAC if link is down. @@ -1016,6 +1019,9 @@ s32 ixgbe_blink_led_stop_X540(struct ixgbe_hw *hw, u32 index) u32 macc_reg; u32 ledctl_reg; + if (index > 3) + return IXGBE_ERR_PARAM; + DEBUGFUNC("ixgbe_blink_led_stop_X540"); /* Restore the LED to its default value. */ -- 2.20.1