[Bug 3821] New: Memory leak in agent_cleanup_stale

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3821

            Bug ID: 3821
           Summary: Memory leak in agent_cleanup_stale
           Product: Portable OpenSSH
           Version: -current
          Hardware: amd64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: ssh-agent
          Assignee: unassigned-bugs at mindrot.org
          Reporter: cmbugz at sent.com

I see this memory leak when running master (61525ba9):

14 bytes in 1 blocks are definitely lost in loss record 3 of 4
   at 0x48A67C2: malloc (vg_replace_malloc.c:446)
   by 0x4ED0B3F: __vasprintf_internal (vasprintf.c:116)
   by 0x4020E1B: xvasprintf (xmalloc.c:102)
   by 0x4020EFB: xasprintf (xmalloc.c:115)
   by 0x4012A7C: agent_cleanup_stale (misc-agent.c:290)
   by 0x400EB2B: main (ssh-agent.c:2424)


It looks like the prefix variable is not cleaned up in all branches:

290   xasprintf(&prefix, "s.%s.", path);

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