From 64b69f8c89352975c25730bcca4bf8af2296297f Mon Sep 17 00:00:00 2001 From: Vignesh Raghavendra Date: Wed, 20 May 2020 22:35:41 +0530 Subject: [PATCH] phy: Fix possible NULL pointer deference It is possible that users of generic_phy_*() APIs may pass a valid struct phy pointer but phy->dev can be NULL, leading to NULL pointer deference in phy_dev_ops(). So call generic_phy_valid() to verify that phy and phy->dev are both valid. Signed-off-by: Vignesh Raghavendra --- drivers/phy/phy-uclass.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/phy/phy-uclass.c b/drivers/phy/phy-uclass.c index 65b5316..db7f39c 100644 --- a/drivers/phy/phy-uclass.c +++ b/drivers/phy/phy-uclass.c @@ -118,7 +118,7 @@ int generic_phy_init(struct phy *phy) { struct phy_ops const *ops; - if (!phy) + if (!generic_phy_valid(phy)) return 0; ops = phy_dev_ops(phy->dev); @@ -129,7 +129,7 @@ int generic_phy_reset(struct phy *phy) { struct phy_ops const *ops; - if (!phy) + if (!generic_phy_valid(phy)) return 0; ops = phy_dev_ops(phy->dev); @@ -140,7 +140,7 @@ int generic_phy_exit(struct phy *phy) { struct phy_ops const *ops; - if (!phy) + if (!generic_phy_valid(phy)) return 0; ops = phy_dev_ops(phy->dev); @@ -151,7 +151,7 @@ int generic_phy_power_on(struct phy *phy) { struct phy_ops const *ops; - if (!phy) + if (!generic_phy_valid(phy)) return 0; ops = phy_dev_ops(phy->dev); @@ -162,7 +162,7 @@ int generic_phy_power_off(struct phy *phy) { struct phy_ops const *ops; - if (!phy) + if (!generic_phy_valid(phy)) return 0; ops = phy_dev_ops(phy->dev); -- 2.7.4