linux-kernel - Re: [v3.11][Regression] HID: hyperv: convert alloc+memcpy to memdup

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Date:	Thu, 19 Dec 2013 10:59:03 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	David Herrmann <dh.herrmann@...il.com>
cc:	Joseph Salisbury <joseph.salisbury@...onical.com>,
	Dan Carpenter <dan.carpenter@...cle.com>, thomas@...3r.de,
	list@...osl.org, Haiyang Zhang <haiyangz@...rosoft.com>,
	LKML <linux-kernel@...r.kernel.org>, open@...osl.org,
	HID CORE LAYER <linux-input@...r.kernel.org>,
	"driverdev-devel@...uxdriverproject.org" 
	<devel@...uxdriverproject.org>
Subject: Re: [v3.11][Regression] HID: hyperv: convert alloc+memcpy to
 memdup

On Thu, 19 Dec 2013, David Herrmann wrote:

> > diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> > index 253fe23..81eacd3 100644
> > --- a/drivers/hid/hid-core.c
> > +++ b/drivers/hid/hid-core.c
> > @@ -1334,7 +1334,7 @@ int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
> >                 csize--;
> >         }
> >
> > -       rsize = ((report->size - 1) >> 3) + 1;
> > +       rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0) + 7;
> 
> Isn't "report->id" already covered by "if (report_enum->numbered)"
> above? The test for "id > 0" won't work here as in this case
> "report_enum->numbered" must already be set to true by the hid-desc
> parser, doesn't it?

Right, that one is not correct here, thanks.

> Where exactly did you get the +7 from?

Please see commit (the one I am not really proud of) 27ce405039bfe6d3.

-- 
Jiri Kosina
SUSE Labs
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