Messages in this thread | | | Date | Thu, 20 Jan 2022 16:38:02 +0100 | From | Greg Kroah-Hartman <> | Subject | Re: [PATCH] driver core: fix null pointer deref in device_find_child |
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On Thu, Jan 20, 2022 at 04:02:46PM +0100, Soenke Huster wrote: > Similar to device_for_each_child, device_find_child should not ooops > if parent->p is NULL. While fuzzing the Bluetooth subsystem, I got a null > pointer dereference in next_device, which is prevented by this change. > > Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=215497 > Signed-off-by: Soenke Huster <soenke.huster@eknoes.de> > --- > I found this while fuzzing the bluetooth subsystem and reported this bug > in bugzilla. As I feel more like a kernelnewbie, I am not sure whether > this needs to be patched in driver core, or is just an issue of the > bluetooth subsystem itself. If the latter is the case: sorry for the > spam!
bluetooth should be fixed, this is an indication that something is using a stale pointer and this would be the least of the problems here.
thanks,
greg k-h
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