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Re: kern/50810: Kernel page fault trap in ugenclose()

The following reply was made to PR kern/50810; it has been noted by GNATS.

From: Nick Hudson <>
 Andreas Gustafsson <>
Subject: Re: kern/50810: Kernel page fault trap in ugenclose()
Date: Sat, 20 Feb 2016 09:56:39 +0000

 On 02/16/16 09:30, Andreas Gustafsson wrote:
 >   ugenioctl: cmd=c00c5567
 >   ugenclose: flag=1, mode=8192, unit=0, endpt=1
 >   ugenclose: endpt=1 dir=1 sce=0xffff8000037e34d8
 >   ugenclose: endpt=1 dir=1 no edesc
 >   ugenclose: flag=2, mode=8192, unit=0, endpt=2
 >   ugenclose: endpt=2 dir=0 sce=0xffff8000037e3660
 >   ugenclose: endpt=2 dir=0 no edesc
 >   ugenclose: flag=3, mode=8192, unit=0, endpt=0
 >   ugenclose: close control
 The ioctl (USB_SET_ALTINTERFACE) is blatting edesc and making it fail
 Not sure why it's doing this before closing the endpoints.
 Maybe the ioctl should fail here?

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