[Bug 209538] use-after-free bug in nscd cache_read() - Coverity CID 1006083

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209538

            Bug ID: 209538
           Summary: use-after-free bug in nscd cache_read() - Coverity CID
                    1006083
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Keywords: patch
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: truckman at FreeBSD.org

Created attachment 170339
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=170339&action=edit
patch to fix use-after-free error in nscd

Coverity flagged a use-after-free error in the nscd cache_read function.  It
noticed that find_res->value is getting freed before it gets passed to
memcpy().  It looks like the problem is a missing return (-1) inside the

    if (find_res->fifo_policy_item->last_request_time.tv_sec -
        find_res->fifo_policy_item->creation_time.tv_sec
        common_entry->common_params.max_lifetime.tv_sec) {

block.

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