[PATCH AUTOSEL 4.14 21/43] staging: rtlwifi: Fix potential NULL pointer dereference of kzalloc

[Sasha Levin]

From: Aditya Pakki <pakki001@xxxxxxx>

[ Upstream commit 6a8ca24590a2136921439b376c926c11a6effc0e ]

phydm.internal is allocated using kzalloc which is used multiple
times without a check for NULL pointer. This patch avoids such a
scenario by returning 0, consistent with the failure case.

Signed-off-by: Aditya Pakki <pakki001@xxxxxxx>
Reviewed-by: Mukesh Ojha <mojha@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin (Microsoft) <sashal@xxxxxxxxxx>
---
 drivers/staging/rtlwifi/phydm/rtl_phydm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/rtlwifi/phydm/rtl_phydm.c b/drivers/staging/rtlwifi/phydm/rtl_phydm.c
index 85e490d3601f..cab563fefc34 100644
--- a/drivers/staging/rtlwifi/phydm/rtl_phydm.c
+++ b/drivers/staging/rtlwifi/phydm/rtl_phydm.c
@@ -191,6 +191,8 @@ static int rtl_phydm_init_priv(struct rtl_priv *rtlpriv,
 
 	rtlpriv->phydm.internal =
 		kzalloc(sizeof(struct phy_dm_struct), GFP_KERNEL);
+	if (!rtlpriv->phydm.internal)
+		return 0;
 
 	_rtl_phydm_init_com_info(rtlpriv, ic, params);
 
-- 
2.19.1