[PATCH] Staging: rtl8192e: Fix potential NULL pointer dereference
Emil Goode
emilgoode at gmail.com
Wed Jul 2 17:26:20 UTC 2014
Hello Greg,
On Wed, Jul 02, 2014 at 09:33:34AM -0700, Greg Kroah-Hartman wrote:
> On Wed, Jul 02, 2014 at 11:25:51AM +0200, Emil Goode wrote:
> > We need to make sure the struct rtllib_device pointer ieee is not NULL
> > after the goto rx_dropped label since it is dereferenced there.
> >
> > Signed-off-by: Emil Goode <emilgoode at gmail.com>
> > ---
> > drivers/staging/rtl8192e/rtllib_rx.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/staging/rtl8192e/rtllib_rx.c b/drivers/staging/rtl8192e/rtllib_rx.c
> > index 60de54c..7db3e74 100644
> > --- a/drivers/staging/rtl8192e/rtllib_rx.c
> > +++ b/drivers/staging/rtl8192e/rtllib_rx.c
> > @@ -1496,7 +1496,8 @@ int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
> > return ret;
> >
> > rx_dropped:
> > - ieee->stats.rx_dropped++;
> > + if (ieee)
> > + ieee->stats.rx_dropped++;
> > return 0;
> > }
> > EXPORT_SYMBOL(rtllib_rx);
>
> Is this something that is hitting users today in the tree, or is this
> just a bug you found looking at the code?
It's a static checker fix and I'm not aware of any impact on users.
If you want I will resend with that information added?
Best regards,
Emil Goode
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