[Bug 216543] kernel NULL pointer dereference usb_hcd_alloc_bandwidth

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https://bugzilla.kernel.org/show_bug.cgi?id=216543

--- Comment #3 from Nazar Mokrynskyi (nazar@xxxxxxxxxxxxxx) ---
> That's really an unstable and unsupported system, sorry.  If you fix your
> cable it should work properly, right?

Yes. And I totally understand that is not supported, the only reason I posted
this is because it seemed to uncover some race condition in the code that might
be beneficial to fix.

> What about any kernel log messages from right before this crashed?
> There should be some disconnect or other USB messages, right?  Specifics
here would be good to see.

Attached full kernel log.

> This isn't good, we shouldn't crash when a device is removed, but this
might be an issue with some reference counting.  More log messages might
help out here.

Yes, that is the reason I decided to create a bug report, just hoping it is
useful.

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