Merge tag 'migration-20240802-pull-request' of https://gitlab.com/farosas/qemu into staging

Migration pull request

- Akihiko Odaki's fix for a memory leak on ppc migration
- Fabiano's fix for asserts during multifd error handling

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# gpg: Signature made Sat 03 Aug 2024 12:23:27 AM AEST
# gpg:                using RSA key AA1B48B0A22326A5A4C364CFC798DC741BEC319D
# gpg:                issuer "farosas@suse.de"
# gpg: Good signature from "Fabiano Rosas <farosas@suse.de>" [unknown]
# gpg:                 aka "Fabiano Almeida Rosas <fabiano.rosas@suse.com>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: AA1B 48B0 A223 26A5 A4C3  64CF C798 DC74 1BEC 319D

* tag 'migration-20240802-pull-request' of https://gitlab.com/farosas/qemu:
  migration/multifd: Fix multifd_send_setup cleanup when channel creation fails
  migration: Fix cleanup of iochannel in file migration
  migration: Free removed SaveStateEntry

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

migration/file.c

@@ -112,7 +112,6 @@ void file_start_outgoing_migration(MigrationState *s,
         error_setg_errno(errp, errno,
                          "failed to truncate migration file to offset %" PRIx64,
                          offset);
-        object_unref(OBJECT(fioc));
         return;
     }
 
@@ -120,7 +119,6 @@ void file_start_outgoing_migration(MigrationState *s,
 
     ioc = QIO_CHANNEL(fioc);
     if (offset && qio_channel_io_seek(ioc, offset, SEEK_SET, errp) < 0) {
-        object_unref(OBJECT(fioc));
         return;
     }
     qio_channel_set_name(ioc, "migration-file-outgoing");

migration/multifd.c

@@ -1156,7 +1156,6 @@ static bool multifd_new_send_channel_create(gpointer opaque, Error **errp)
 bool multifd_send_setup(void)
 {
     MigrationState *s = migrate_get_current();
-    Error *local_err = NULL;
     int thread_count, ret = 0;
     uint32_t page_count = MULTIFD_PACKET_SIZE / qemu_target_page_size();
     bool use_packets = multifd_use_packets();
@@ -1177,6 +1176,7 @@ bool multifd_send_setup(void)
 
     for (i = 0; i < thread_count; i++) {
         MultiFDSendParams *p = &multifd_send_state->params[i];
+        Error *local_err = NULL;
 
         qemu_sem_init(&p->sem, 0);
         qemu_sem_init(&p->sem_sync, 0);
@@ -1196,7 +1196,8 @@ bool multifd_send_setup(void)
         p->write_flags = 0;
 
         if (!multifd_new_send_channel_create(p, &local_err)) {
-            return false;
+            migrate_set_error(s, local_err);
+            ret = -1;
         }
     }
 
@@ -1209,24 +1210,27 @@ bool multifd_send_setup(void)
         qemu_sem_wait(&multifd_send_state->channels_created);
     }
 
+    if (ret) {
+        goto err;
+    }
+
     for (i = 0; i < thread_count; i++) {
         MultiFDSendParams *p = &multifd_send_state->params[i];
+        Error *local_err = NULL;
 
         ret = multifd_send_state->ops->send_setup(p, &local_err);
         if (ret) {
-            break;
+            migrate_set_error(s, local_err);
+            goto err;
         }
     }
 
-    if (ret) {
-        migrate_set_error(s, local_err);
-        error_report_err(local_err);
-        migrate_set_state(&s->state, MIGRATION_STATUS_SETUP,
-                          MIGRATION_STATUS_FAILED);
-        return false;
-    }
-
     return true;
+
+err:
+    migrate_set_state(&s->state, MIGRATION_STATUS_SETUP,
+                      MIGRATION_STATUS_FAILED);
+    return false;
 }
 
 bool multifd_recv(void)

migration/savevm.c

@@ -874,6 +874,8 @@ int vmstate_replace_hack_for_ppc(VMStateIf *obj, int instance_id,
 
     if (se) {
         savevm_state_handler_remove(se);
+        g_free(se->compat);
+        g_free(se);
     }
     return vmstate_register(obj, instance_id, vmsd, opaque);
 }