Messages in this thread | | | Date | Tue, 06 Oct 2009 10:15:12 +0900 | From | Tejun Heo <> | Subject | Re: get_device_parent() race bug |
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Greg KH wrote: >>> BUG: unable to handle kernel NULL pointer dereference at 0000000000000038 >> Ping. This one needs to be fixed in -stable. It can be triggered by >> other char devices too. > > Sorry, been slowly catching up... > > This can be triggered by char devices? Huh? How? I don't see the > failure path that is happening here.
Oooh, s/char/virtual/. The bug is in the path which creates a directory under the phony parent.
> And char devices shouldn't really be using the kobject at all, except > for a very basic reference count. > > I keep threatening to rip kobject out of a char device and just use a > kref, as that is all that is really needed. Well, that and the kmap > stuff, but again, it's not a "real" kobject being used there... > > Perhaps now is the time to do this.
Yay!
-- tejun
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