Subject: Re: Crashes when removing an usb flash reader
To: None <firstname.lastname@example.org>
From: Steven M. Bellovin <email@example.com>
Date: 07/21/2003 10:53:51
In message <20030721142858.29BA714401@tiamat.goathill.org>, MLH writes:
>Michal 'hramrach' Suchanek wrote:
>> On Sat, Jul 19, 2003 at 12:59:27PM +0200, Lennart Augustsson wrote:
>>> Can you get into the debugger when it happens?
>>> -- Lennart
>> The first time I encountered this I got an uvm fault and was dropped to
>> the debugger. However, the command that was supposed to give a stack trace
>> caused one more (iirc the same) fault and sync did not finish, no coredump
>> after reboot.
>FWIW, if I remove my flash reader before unmounting it on all of
>the NetBSD hosts I use it on, that host completely locks up. No
>coredump, no debugger, no remote login, it doesn't even respond to
>a ping at that point. It has been this way since this reader was
>first enabled (last fall - post 1.6 -current).
The same is true of pcmcia cards, including ones that are removed while
the machine is suspend. *That* is a bad misfeature.
--Steve Bellovin, http://www.research.att.com/~smb