Re: [PATCH v3] staging: rtlwifi: Fix potential NULL pointer dereference of kzalloc

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On 3/20/2019 9:12 PM, Aditya Pakki wrote:
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>

---
v2: Move the signed off line above
v1: Patch collision with different things, fix as per Greg
---
  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 9930ed954abb..4cc77b2016e1 100644
--- a/drivers/staging/rtlwifi/phydm/rtl_phydm.c
+++ b/drivers/staging/rtlwifi/phydm/rtl_phydm.c
@@ -180,6 +180,8 @@ 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);



Reviewed-by:  Mukesh Ojha <mojha@xxxxxxxxxxxxxx>

Thanks,
Mukesh


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