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Re: kern/41754

The following reply was made to PR kern/41754; it has been noted by GNATS.

From: Wim Lewis <>
Subject: Re: kern/41754
Date: Tue, 11 Aug 2009 01:06:00 -0700

 After some more experimentation I've figured out the steps needed to  
 reproduce the crash reliably:
    1. attach the device
    2. use a python+libusb program to download some firmware
    3. halt the device but do not detach it
    4. attempt to access the device again using py+libusb (it will not  
 be found)
    5. detach and reattach the device
 NetBSD (I'm now running 5.0.1) will reliably crash when the device is  
 reattached. If I skip step (4), it will reliably *not* crash. The  
 syscall-level effect of (4) is to open the /dev/usb## devices, close  
 them, reopen them and issue USB_DEVICEINFO ioctls.

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