From 48d5548fc5e5ad79ca98a287b67f403834929739 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <error27@gmail.com>
Date: Thu, 15 Jul 2010 10:23:10 +0200
Subject: [PATCH] orinoco_usb: potential null dereference
Smatch complains that "upriv->read_urb" gets dereferenced before
checking for NULL. It turns out that it's possible for
"upriv->read_urb" to be NULL so I added checks around the dereferences.
Also I remove an "if (upriv->bap_buf != NULL)" check because
"kfree(NULL) is OK.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/orinoco/orinoco_usb.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/orinoco/orinoco_usb.c b/drivers/net/wireless/orinoco/orinoco_usb.c
index 020da76c9558a..b7864001e7e16 100644
--- a/drivers/net/wireless/orinoco/orinoco_usb.c
+++ b/drivers/net/wireless/orinoco/orinoco_usb.c
@@ -1502,16 +1502,16 @@ static inline void ezusb_delete(struct ezusb_priv *upriv)
ezusb_ctx_complete(list_entry(item,
struct request_context, list));
- if (upriv->read_urb->status == -EINPROGRESS)
+ if (upriv->read_urb && upriv->read_urb->status == -EINPROGRESS)
printk(KERN_ERR PFX "Some URB in progress\n");
mutex_unlock(&upriv->mtx);
- kfree(upriv->read_urb->transfer_buffer);
- if (upriv->bap_buf != NULL)
- kfree(upriv->bap_buf);
- if (upriv->read_urb != NULL)
+ if (upriv->read_urb) {
+ kfree(upriv->read_urb->transfer_buffer);
usb_free_urb(upriv->read_urb);
+ }
+ kfree(upriv->bap_buf);
if (upriv->dev) {
struct orinoco_private *priv = ndev_priv(upriv->dev);
orinoco_if_del(priv);
--
2.30.2