multi_cleanup: call DONE on handles that never got that

... fixes a memory leak with at least IMAP when remove_handle is never
called and the transfer is abruptly just abandoned early.

Test 1552 added to verify

Detected by OSS-fuzz
Assisted-by: Max Dymond
Closes #1954

2 files changed, 97 insertions, 1 deletions

diff --git a/tests/libtest/Makefile.inc b/tests/libtest/Makefile.inc
index 065899276..59e3b281d 100644
--- a/tests/libtest/Makefile.inc
+++ b/tests/libtest/Makefile.inc
@@ -27,7 +27,7 @@ noinst_PROGRAMS = chkhostname libauthretry libntlmconnect                \
  lib1525 lib1526 lib1527 lib1528 lib1529 lib1530 lib1531 lib1532 lib1533 \
  lib1534 lib1535 lib1536 lib1537 lib1538 \
  lib1540 \
- lib1550 lib1551 \
+ lib1550 lib1551 lib1552 \
  lib1900 \
  lib2033
 
@@ -454,6 +454,9 @@ lib1550_CPPFLAGS = $(AM_CPPFLAGS) -DLIB1517
 lib1551_SOURCES = lib1551.c $(SUPPORTFILES)
 lib1551_CPPFLAGS = $(AM_CPPFLAGS)
 
+lib1552_SOURCES = lib1552.c $(SUPPORTFILES) $(TESTUTIL)
+lib1552_CPPFLAGS = $(AM_CPPFLAGS)
+
 lib1900_SOURCES = lib1900.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
 lib1900_LDADD = $(TESTUTIL_LIBS)
 lib1900_CPPFLAGS = $(AM_CPPFLAGS)
diff --git a/tests/libtest/lib1552.c b/tests/libtest/lib1552.c
new file mode 100644
index 000000000..02c4ea860
--- /dev/null
+++ b/tests/libtest/lib1552.c
@@ -0,0 +1,93 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+#include "test.h"
+
+#include "testutil.h"
+#include "warnless.h"
+#include "memdebug.h"
+
+#define TEST_HANG_TIMEOUT 60 * 1000
+
+int test(char *URL)
+{
+  CURL *curls = NULL;
+  CURLM *multi = NULL;
+  int still_running;
+  int i = 0;
+  int res = 0;
+  CURLMsg *msg;
+  int counter = 3;
+
+  start_test_timing();
+
+  global_init(CURL_GLOBAL_ALL);
+
+  multi_init(multi);
+
+  easy_init(curls);
+
+  easy_setopt(curls, CURLOPT_URL, URL);
+  easy_setopt(curls, CURLOPT_HEADER, 1L);
+  easy_setopt(curls, CURLOPT_VERBOSE, 1L);
+  easy_setopt(curls, CURLOPT_USERPWD, "u:s");
+
+  multi_add_handle(multi, curls);
+
+  multi_perform(multi, &still_running);
+
+  abort_on_test_timeout();
+
+  while(still_running && counter--) {
+    int num;
+    res = curl_multi_wait(multi, NULL, 0, TEST_HANG_TIMEOUT, &num);
+    if(res != CURLM_OK) {
+      printf("curl_multi_wait() returned %d\n", res);
+      res = TEST_ERR_MAJOR_BAD;
+      goto test_cleanup;
+    }
+
+    abort_on_test_timeout();
+
+    multi_perform(multi, &still_running);
+
+    abort_on_test_timeout();
+  }
+
+  msg = curl_multi_info_read(multi, &still_running);
+  if(msg)
+    /* this should now contain a result code from the easy handle,
+       get it */
+    i = msg->data.result;
+
+test_cleanup:
+
+  /* undocumented cleanup sequence - type UA */
+
+  curl_multi_cleanup(multi);
+  curl_easy_cleanup(curls);
+  curl_global_cleanup();
+
+  if(res)
+    i = res;
+
+  return i; /* return the final return code */
+}