[PATCH] usb: core: buffer: avoid NULL pointer dereferrence

[Greg Kroah-Hartman]

On Fri, Apr 08, 2016 at 05:08:03PM +0800, Chunfeng Yun wrote:
> NULL pointer dereferrence will happen when class driver
> wants to allocate zero length buffer and pool_max[0]
> can't be used, so skip reserved pool in this case.

Why would a driver want to allocate a 0 length buffer?  What driver does
this?

Shouldn't we fix that issue instead?

thanks,

greg k-h