Ubuntu
bind9 package

  1. Bug #1710278
  2. Comment #36

Comment 36 for bug 1710278

Revision history for this message
Dan Streetman (ddstreet) wrote :

> Looks like that was the last one for this particular bug.

spoke too soon. Next deadlock is same place for thread A, dns_resolver_shutdown, while thread B is similar, fctx_create->dns_view_findzonecut->dns_view_findzonecut2 where it hangs on the view->lock.

Really, dns_resolver_shutdown (which holds the view->lock and iterates through taking each of the view's bucket locks) and fctx_create (which requires the caller to hold the bucket lock, and calls lots of functions that take the view->lock) will continue to deadlock like this until upstream does large changes to locking, which is what they're doing:
https://gitlab.isc.org/isc-projects/bind9/merge_requests/2132

However that's still WIP, and the changes so far are large (30 commits as of this comment):
https://gitlab.isc.org/isc-projects/bind9/merge_requests/2132/commits

So backporting all that may be outside the scope of normal SRUs.