This fixes a NULL dereference in the case where the client
asks for CURLINFO_TLS_SESSION data after the (TLS) session
has already been destroyed (i.e. curl_easy_perform has
already completed for this handle). Instead of crashing,
we now return an error (CURLSSLBACKEND_NONE).

---
 lib/getinfo.c |    2 ++
 1 file changed, 2 insertions(+)
diff --git a/lib/getinfo.c b/lib/getinfo.c
index 6a4e72e..80ca264 100644
--- a/lib/getinfo.c
+++ b/lib/getinfo.c
@@ -288,6 +288,8 @@ static CURLcode getinfo_slist(struct SessionHandle *data, CURLINFO info,
       tlsinfo->ssl_backend = CURLSSLBACKEND_NONE;
       tlsinfo->internals = NULL;
 
+      if(conn == NULL)
+        break;
       /* Find the active ("in use") SSL connection, if any */
       while((sockindex < sizeof(conn->ssl) / sizeof(conn->ssl[0])) &&
             (!conn->ssl[sockindex].use))
-- 
1.7.10.4
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