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https://issues.apache.org/jira/browse/TS-3359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brian Geffon resolved TS-3359.
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Resolution: Fixed
> Use after free: Tunnel destroyed without updating HttpSM
> --------------------------------------------------------
>
> Key: TS-3359
> URL: https://issues.apache.org/jira/browse/TS-3359
> Project: Traffic Server
> Issue Type: Bug
> Components: Core
> Reporter: Brian Geffon
> Assignee: Brian Geffon
> Fix For: 5.3.0
>
>
> In HttpSM there is a member called ua_session which is a HttpClientSession.
> When chain_abort_all() is called in HttpSM::tunnel_handler_server on the
> is_http_server_eos_truncation() case it causes this client session to be
> destroyed but it is later referenced in HttpSM::tunnel_handler_server.
> Typically this object will be on the freelist and it will happily address the
> memory; however, under high loads this will obviously lead to issues. This
> was detected by disabling freelist and using address sanitizer. The patch
> will be attached.
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