Re: [PATCH RESEND] USB HID: Protect against disconnect/NULL-dereference race

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On Thu, 12 Aug 2010, Chris Ball wrote:

> One of our users reports consistently hitting a NULL dereference that
> resolves to the "hid_to_usb_dev(hid);" call in hiddev_ioctl(), when
> disconnecting a Lego WeDo USB HID device from an OLPC XO running
> Scratch software.  There's a FIXME comment and a guard against the
> dereference, but that happens farther down the function than the
> initial dereference does.
> 
> This patch moves the call to be below the guard, and the user reports
> that it fixes the problem for him.  OLPC bug report:
> http://dev.laptop.org/ticket/10174
> 
> Signed-off-by: Chris Ball <cjb@xxxxxxxxxx>

Applied, thanks Chris.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.
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