Messages in this thread | | | Date | Tue, 7 Aug 2018 17:07:54 -0400 | From | Sowmini Varadhan <> | Subject | Re: possible deadlock in rds_wake_sk_sleep |
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On (08/07/18 13:47), syzbot wrote: > Possible unsafe locking scenario: > > CPU0 CPU1 > ---- ---- > lock(&(&rm->m_rs_lock)->rlock); > lock(&rs->rs_recv_lock); > lock(&(&rm->m_rs_lock)->rlock); > lock(&rs->rs_recv_lock); > > *** DEADLOCK ***
looks like a valid find, I think the deadlock should be avoided by having rds_clear_recv_queue do something like
get rs_recv_lock un-tether the rs_recv_queue into a temporary list releease rs_recv_lock purge the rds_incoming temporary list
I can give this a shot later this week.
--Sowmini
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