From: Tuo Li <islituo@gmail.com>
Date: Wed, 11 Aug 2021 03:11:35 +0000 (-0700)
Subject: staging: rtl8192e: rtl_core: Fix possible null-pointer dereference in _rtl92e_pci_dis... 
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=25ee7e89d45debc195cc8cec2483e07bbccd1472;p=linux.git

staging: rtl8192e: rtl_core: Fix possible null-pointer dereference in _rtl92e_pci_disconnect()

The variable dev is checked in:
  if (dev)

This indicates that it can be NULL. If so, a null-pointer dereference will
occur:
  priv = rtllib_priv(dev);

However, the value of priv is not used in the remaining part of this
function. Thus the else-branch can be removed to fix this posible
null-pointer dereference.

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tuo Li <islituo@gmail.com>
Link: https://lore.kernel.org/r/20210811031135.4110-1-islituo@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
index dffae61b517bc..a7dd1578b2c6a 100644
--- a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
+++ b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
@@ -2556,8 +2556,6 @@ static void _rtl92e_pci_disconnect(struct pci_dev *pdev)
 			release_mem_region(pci_resource_start(pdev, 1),
 					pci_resource_len(pdev, 1));
 		}
-	} else {
-		priv = rtllib_priv(dev);
 	}
 
 	pci_disable_device(pdev);