Lock on JudgeState::updateRelatedInfo

models/judge_state.js

@@ -173,6 +173,8 @@ class JudgeState extends Model {
   }
 
   async updateRelatedInfo(newSubmission) {
+    await syzoj.utils.lock(['JudgeState::updateRelatedInfo', 'problem', this.problem_id], async () => {
+      await syzoj.utils.lock(['JudgeState::updateRelatedInfo', 'user', this.user_id], async () => {
         if (this.type === 0) {
           if (newSubmission) {
             await this.loadRelationships();
@@ -191,6 +193,8 @@ class JudgeState extends Model {
           let contest = await Contest.fromID(this.type_info);
           await contest.newSubmission(this);
         }
+      });
+    });
   }
 
   async rejudge() {