Spotted thanks to ASAN:
QTEST_QEMU_BINARY=x86_64-softmmu/qemu-system-x86_64 tests/migration-test -p 
/x86_64/migration/bad_dest

==30302==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 48 byte(s) in 1 object(s) allocated from:
    #0 0x7f60efba1a38 in __interceptor_calloc (/lib64/libasan.so.4+0xdea38)
    #1 0x7f60eef3cf75 in g_malloc0 ../glib/gmem.c:124
    #2 0x55ca9094702c in error_copy /home/elmarco/src/qemu/util/error.c:203
    #3 0x55ca9037a30f in migrate_set_error 
/home/elmarco/src/qemu/migration/migration.c:1139
    #4 0x55ca9037a462 in migrate_fd_error 
/home/elmarco/src/qemu/migration/migration.c:1150
    #5 0x55ca9038162b in migrate_fd_connect 
/home/elmarco/src/qemu/migration/migration.c:2411
    #6 0x55ca90386e41 in migration_channel_connect 
/home/elmarco/src/qemu/migration/channel.c:81
    #7 0x55ca9038335e in socket_outgoing_migration 
/home/elmarco/src/qemu/migration/socket.c:85
    #8 0x55ca9083dd3a in qio_task_complete /home/elmarco/src/qemu/io/task.c:142
    #9 0x55ca9083d6cc in gio_task_thread_result 
/home/elmarco/src/qemu/io/task.c:88
    #10 0x7f60eef37317 in g_idle_dispatch ../glib/gmain.c:5552
    #11 0x7f60eef3490b in g_main_dispatch ../glib/gmain.c:3182
    #12 0x7f60eef357ac in g_main_context_dispatch ../glib/gmain.c:3847
    #13 0x55ca90927231 in glib_pollfds_poll 
/home/elmarco/src/qemu/util/main-loop.c:214
    #14 0x55ca90927420 in os_host_main_loop_wait 
/home/elmarco/src/qemu/util/main-loop.c:261
    #15 0x55ca909275fa in main_loop_wait 
/home/elmarco/src/qemu/util/main-loop.c:515
    #16 0x55ca8fc1c2a4 in main_loop /home/elmarco/src/qemu/vl.c:1942
    #17 0x55ca8fc2eb3a in main /home/elmarco/src/qemu/vl.c:4724
    #18 0x7f60e4082009 in __libc_start_main (/lib64/libc.so.6+0x21009)

Indirect leak of 45 byte(s) in 1 object(s) allocated from:
    #0 0x7f60efba1850 in malloc (/lib64/libasan.so.4+0xde850)
    #1 0x7f60eef3cf0c in g_malloc ../glib/gmem.c:94
    #2 0x7f60eef3d1cf in g_malloc_n ../glib/gmem.c:331
    #3 0x7f60eef596eb in g_strdup ../glib/gstrfuncs.c:363
    #4 0x55ca90947085 in error_copy /home/elmarco/src/qemu/util/error.c:204
    #5 0x55ca9037a30f in migrate_set_error 
/home/elmarco/src/qemu/migration/migration.c:1139
    #6 0x55ca9037a462 in migrate_fd_error 
/home/elmarco/src/qemu/migration/migration.c:1150
    #7 0x55ca9038162b in migrate_fd_connect 
/home/elmarco/src/qemu/migration/migration.c:2411
    #8 0x55ca90386e41 in migration_channel_connect 
/home/elmarco/src/qemu/migration/channel.c:81
    #9 0x55ca9038335e in socket_outgoing_migration 
/home/elmarco/src/qemu/migration/socket.c:85
    #10 0x55ca9083dd3a in qio_task_complete /home/elmarco/src/qemu/io/task.c:142
    #11 0x55ca9083d6cc in gio_task_thread_result 
/home/elmarco/src/qemu/io/task.c:88
    #12 0x7f60eef37317 in g_idle_dispatch ../glib/gmain.c:5552
    #13 0x7f60eef3490b in g_main_dispatch ../glib/gmain.c:3182
    #14 0x7f60eef357ac in g_main_context_dispatch ../glib/gmain.c:3847
    #15 0x55ca90927231 in glib_pollfds_poll 
/home/elmarco/src/qemu/util/main-loop.c:214
    #16 0x55ca90927420 in os_host_main_loop_wait 
/home/elmarco/src/qemu/util/main-loop.c:261
    #17 0x55ca909275fa in main_loop_wait 
/home/elmarco/src/qemu/util/main-loop.c:515
    #18 0x55ca8fc1c2a4 in main_loop /home/elmarco/src/qemu/vl.c:1942
    #19 0x55ca8fc2eb3a in main /home/elmarco/src/qemu/vl.c:4724
    #20 0x7f60e4082009 in __libc_start_main (/lib64/libc.so.6+0x21009)

Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
 migration/migration.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/migration/migration.c b/migration/migration.c
index e345d0cc7e..62c243d2d4 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2541,6 +2541,7 @@ static void migration_instance_finalize(Object *obj)
     g_free(params->tls_hostname);
     g_free(params->tls_creds);
     qemu_sem_destroy(&ms->pause_sem);
+    error_free(ms->error);
 }
 
 static void migration_instance_init(Object *obj)
-- 
2.16.2.346.g9779355e34


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