New subject: [Issue 10083] lload: Receiving a NoD while connection is closing already corrupts c_state

19 Jul 2023


      https://bugs.openldap.org/show_bug.cgi?id=10083
Issue ID: 10083
           Summary: lload: Receiving a NoD while connection is closing
                    already corrupts c_state
           Product: OpenLDAP
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Keywords: needs_review
          Severity: normal
          Priority: ---
         Component: lloadd
          Assignee: bugs@openldap.org
          Reporter: ondra@mistotebe.net
  Target Milestone: ---
If the backend closes a connection with a NoD, two things happen: we won't be
able to write to the socket and we receive the NoD message.
lloadd might encounter those in either order, but handle_unsolicited() doesn't
expect to be the second one to come in and happily overrides c_state, even if
c_unlink() has been called by the write side already. upstream_destroy()
eventually discovers the inconsistent state (LLOAD_C_CLOSING vs. LLOAD_C_DYING)
and assert()s.
A fix to handle_unsolicited() is coming.
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[Issue 10083] New: lload: Receiving a NoD while connection is closing already corrupts c_state