kern/72636: Detaching USB-Memorystick without prior umount can cause System panic

[Simon L. Nielsen]

On 2004.10.13 14:01:13 +0100, Ceri Davies wrote:
> On Wed, Oct 13, 2004 at 12:48:39PM +0000, Simon L. Nielsen wrote:
> > Synopsis: Detaching USB-Memorystick without prior umount can cause System panic
> > 
> > State-Changed-From-To: open->closed
> > State-Changed-By: simon
> > State-Changed-When: Wed Oct 13 12:45:41 GMT 2004
> > State-Changed-Why: 
> > This is a known problem which is mentioned many times in the mail
> > archives, and probably also in few PR's.  People are working towards
> > fixing this problem, but it's far from trivial.
> > Close the PR since this is a well known long term TODO/TOFIX item.
> 
> It should be either left open, or suspended at worst, until this is
> corrected.  If someone is working on it, assign the PR to them, but do
> not close problem reports for problems that are still ongoing please.

As I noted I was pretty sure that there already were PR's for this
(since this issue really comes up every few weeks on the mailing
lists).  Anyway I just quickly checked and other PR's which deal with
the same basic problem (which is that bad thing happens if devices
disappear under a mounted file system):

   72119 freebsd- kern     open      serious   medium   current-us Detaching USB Memory Stick w/o umount causes zombie devfs node
   30160 freebsd- kern     feedback  serious   medium   current-us [panic] kernel panic when flash disk is removed and the flash disk is mounted.
   40787 freebsd- kern     open      serious   low      current-us kernel panic if PCMCIA CD-drive with mounted medium is removed

So I don't see the need to keep this PR open.

-- 
Simon L. Nielsen
FreeBSD Documentation Team
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