GuardReasoner-VL: Safeguarding VLMs via Reinforced Reasoning - Liu, Yue; Zhai, Shengfang; Du, Mingzhe; Chen, Yulin; Cao, Tri; Gao, Hongcheng; Wang, Cheng; Li, Xinfeng; Wang, Kun; Fang, Junfeng; Zhang, Jiaheng; Hooi, Bryan (Advances in Neural Information Processing Systems, 2025)