Re: [PATCH][V3] usb: isp1760: check for null return from kzalloc

[Greg Kroah-Hartman]

On Wed, Jun 03, 2015 at 03:43:23AM +0300, Laurent Pinchart wrote:
> Hi Colin,
> 
> Thank you for the patch.
> 
> On Tuesday 02 June 2015 19:05:13 Colin King wrote:
> > From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> > 
> > isp1760_ep_alloc_request allocates a structure with kzalloc without checking
> > for NULL and then returns a pointer to one of the structure fields. As the
> > field happens to be the first in the structure the caller can properly
> > check for NULL, but this is risky if the structure layout is changed later.
> > Add an explicit NULL check for the kzalloc return value
> > 
> > Detected with smatch static analysis:
> > 
> > drivers/usb/isp1760/isp1760-udc.c:816 isp1760_ep_alloc_request()
> >   error: potential null dereference 'req'.  (kzalloc returns null)
> > 
> > [ thanks to Laurent Pinchart for improved commit message ]
> > 
> > Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> 
> Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> 
> Felipe, I expect you to pick this up, please let me know if there's any issue.

I'll just take it directly, thanks.

greg k-h
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