Re: System hangs with weak USB cable

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On Fri, 26 Feb 2016, Radosław Warowny wrote:

> > I agree, but where was a crash?  I don't have any context here, was
> > there a kernel oops somewhere?  I thought the hub just reset itself.  I
> > have a hub like that here, it resets itself a few times a day, but
> > there's no kernel crash because of it.
> 
> Yes, there were kernel oopses, you can find details at syslog output
> attached to the bug report:
> https://bugzilla.kernel.org/show_bug.cgi?id=112311. I don't cite it
> here since it's too large. I provided two versions of logs - with and
> without  apparmor to exclude it as a cause of problem since there is
> some apparmor call at the first call trace.

It's worth noting that none of the stack traces in that bug report 
mentions USB anywhere.  In every case the problem occurred during 
memory allocation for something else.

Alan Stern

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