[PATCH for-9.2 8/9] tests/qtest/migration-test: Don't strdup in get_dirty_rate()

[Peter Maydell]

We g_strdup() the "status" string we get out of the qdict in
get_dirty_rate(), but we never free it.  Since we only use this
string while the dictionary is still valid, we don't need to strdup
at all; drop the unnecessary call to avoid this leak:

Direct leak of 18 byte(s) in 2 object(s) allocated from:
    #0 0x564b3e01913e in malloc 
(/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/asan/tests/qtest/migration-test+0x22f13e)
 (BuildId: d6403a811332fcc846f93c45e23abfd06d1e67c4)
    #1 0x7f2f278ff738 in g_malloc debian/build/deb/../../../glib/gmem.c:128:13
    #2 0x7f2f27914583 in g_strdup 
debian/build/deb/../../../glib/gstrfuncs.c:361:17
    #3 0x564b3e14bb5b in get_dirty_rate tests/qtest/migration-test.c:3447:14
    #4 0x564b3e138e00 in test_vcpu_dirty_limit 
tests/qtest/migration-test.c:3565:16
    #5 0x564b3e14f417 in migration_test_wrapper 
tests/qtest/migration-helpers.c:456:5

Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
 tests/qtest/migration-test.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index a659609ccb0..04122120987 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -3435,7 +3435,7 @@ static void wait_for_calc_dirtyrate_complete(QTestState 
*who,
 static int64_t get_dirty_rate(QTestState *who)
 {
     QDict *rsp_return;
-    gchar *status;
+    const char *status;
     QList *rates;
     const QListEntry *entry;
     QDict *rate;
@@ -3444,7 +3444,7 @@ static int64_t get_dirty_rate(QTestState *who)
     rsp_return = query_dirty_rate(who);
     g_assert(rsp_return);
 
-    status = g_strdup(qdict_get_str(rsp_return, "status"));
+    status = qdict_get_str(rsp_return, "status");
     g_assert(status);
     g_assert_cmpstr(status, ==, "measured");
 
-- 
2.34.1