Hi Ganesh, Yes, multiple links can share the same owning_addr. It looks, from a reading of the backtrace, that it might not be the address that's double freed, but it might be the outstanding_deliveries field of the address that's being freed here.
-Ted On Tue, Apr 6, 2021 at 12:16 PM Ganesh Murthy <gmur...@redhat.com> wrote: > I have a quick question about qdr_link_t's owning_addr field ( > > https://github.com/apache/qpid-dispatch/blob/1.15.0/src/router_core/router_core_private.h#L437 > ) > > Can the owning_addr on many links point to the same address ? > > For example, can the following be true? > > link1->owning_addr = my_addr > link2->owning_addr = my_addr > > The reason I ask is because of the ASAN crash seen here - > > https://issues.apache.org/jira/browse/DISPATCH-2019?focusedCommentId=17314238&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17314238 > (you will have to "git checkout ead503c94926f732fba7ddd5ee0826aa3bcd2c79" > for the line numbers on the backtrace to match up). > > Looking at that backtrace, it *seems* like two links got detaches and both > links point to the same owning_addr. The first detach call to the core > frees the owning_addr object while the second detach on a different link > with the same owning_addr causes a double free to happen. > The reason I ask is because I have been unable to reproduce this crash so I > am left to guess that this might be the reason for the crash. > > Thanks. >
