Somehow after calling sctp_sendmsg after calling shutdown with SHUT_WR a resource is not freed anymore. I can reproduce the following behaviour: When running for example the following test case https://github.com/nplab/PR_SCTP_Testsuite/blob/master/forward-tsn/sender-side-implementation/shutdown-tests/ttl-policy/shutdown-14.pkt on my machine, it succeeds the first time. This means that the test case worked as expected. But if I run the same test case on the same machine again then the bind-call in the test-case will fail. I waited longer than 30 minutes but only a reboot of the operating system seems to help in this case. See the following test-cases that all reproduce this issue. All call sctp_sendmsg after calling shutdown, therefore i suspect that this is the cause of the issue. Testscripts available at: https://github.com/nplab/PR_SCTP_Testsuite/blob/master/forward-tsn/sender-side-implementation/shutdown-tests/ttl-policy/shutdown-14.pkt https://github.com/nplab/PR_SCTP_Testsuite/blob/master/forward-tsn/sender-side-implementation/shutdown-tests/ttl-policy/shutdown-1.pkt https://github.com/nplab/PR_SCTP_Testsuite/blob/master/forward-tsn/sender-side-implementation/shutdown-tests/ttl-policy/shutdown-2.pkt https://github.com/nplab/PR_SCTP_Testsuite/blob/master/forward-tsn/sender-side-implementation/shutdown-received-tests/ttl-policy/shutdown-1.pkt https://github.com/nplab/PR_SCTP_Testsuite/blob/master/forward-tsn/sender-side-implementation/shutdown-received-tests/ttl-policy/shutdown-2.pkt
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