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    SubjectRe: kernel OOPS when releasing usb webcam (random)
    On Tue, 18 Oct 2011, Antonio Ospite wrote:

    > > > im getting the following null pointer dereference from time to time when
    > > > releasing a usb camera.
    > > >
    > > > maybe this trace is of assistance...please reply to my mail since im not
    > > > subscribed.
    > > >
    > >
    > > I suspect this is happening in v4l2_device_unregister_subdev(). Adding
    > > Guennadi, Mauro, and linux-media.
    > >
    > > > BUG: unable to handle kernel NULL pointer dereference at 0000006c
    > > > IP: [<f90be6c2>] v4l2_device_release+0xa2/0xf0 [videodev]
    >
    > Hi,
    >
    > I sent a fix for a similar trace last week:
    > http://patchwork.linuxtv.org/patch/8124/
    >
    > Tomas, can you test it fixes the problem for you too?
    >

    Tomas reported that the same change from Frederik Deweerdt fixed the
    issue, so you can add his tested-by from
    https://lkml.org/lkml/2011/10/18/298.

    Guennadi or Mauro, how is this going to Linus? It sounds like 3.1
    material since we've received at least a couple of reports of this in the
    past week.


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