[PATCH] usbnet: smsc95xx: dereferencing NULL pointer

From: Sudip Mukherjee
Date: Fri Nov 07 2014 - 08:22:58 EST


we were dereferencing dev to initialize pdata. but just after that we
have a BUG_ON(!dev). so we were basically dereferencing the pointer
first and then tesing it for NULL.

Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
---
drivers/net/usb/smsc95xx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index d07bf4c..3393238 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1670,12 +1670,13 @@ done:
static int smsc95xx_resume(struct usb_interface *intf)
{
struct usbnet *dev = usb_get_intfdata(intf);
- struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
+ struct smsc95xx_priv *pdata;
u8 suspend_flags = pdata->suspend_flags;
int ret;
u32 val;

BUG_ON(!dev);
+ pdata = (struct smsc95xx_priv *)(dev->data[0]);

netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);

--
1.8.1.2

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