Re: kernel BUG at net/rxrpc/local_object.c:LINE!

Dmitry Vyukov
2019-07-31T15:32:01Z

On Wed, Jul 31, 2019 at 5:19 PM David Howells <dhowells@redhat.com> wrote:
>
> Dmitry Vyukov <dvyukov@google.com> wrote:
>
> > Please send a patch for testing that enables this tracing
> > unconditionally. This should have the same effect. There is no way to
> > hook into a middle of the automated process and arbitrary tune things.
>
> I don't know how to do that off hand. Do you have an example?

Few messages above I asked it to test:
https://groups.google.com/d/msg/syzkaller-bugs/gEnZkmEWf1s/r2_X_KVQAQAJ

Basically, git repo + branch + patch. Here are the docs:
https://github.com/google/syzkaller/blob/master/docs/syzbot.md#testing-patches

> Anyway, I think rxrpc_local_processor() is broken with respect to refcounting
> as it gets scheduled when usage==0, but that doesn't stop it being rescheduled
> again by a network packet before it manages to close the UDP socket.
>
> David