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migration: add missing qemu_mutex_lock_iothread in migration_completion 

qemu_savevm_state_complete_postcopy assumes the iothread lock (BQL)
to be held, but instead it isn't.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20211005080751.3797161-3-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Emanuele Giuseppe Esposito 2021-10-05 04:07:51 -04:00 committed by Paolo Bonzini
parent 3c158eba1e
commit 68b88468f6
1 changed files with 3 additions and 0 deletions
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3
migration/migration.c
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@ -3168,7 +3168,10 @@ static void migration_completion(MigrationState *s)
} else if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) {
trace_migration_completion_postcopy_end();
qemu_mutex_lock_iothread();
qemu_savevm_state_complete_postcopy(s->to_dst_file);
qemu_mutex_unlock_iothread();
trace_migration_completion_postcopy_end_after_complete();
} else if (s->state == MIGRATION_STATUS_CANCELLING) {
goto fail;