From: Qiang Ma <maqianga@uniontech.com>
Date: Thu, 11 Jun 2026 12:46:43 +0000 (+0800)
Subject: LoongArch: KVM: Check the return values for put_user()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fb89e0fe2dc4246c86ad0eb0fa2b7cb2f8ba9728;p=thirdparty%2Fkernel%2Flinux.git

LoongArch: KVM: Check the return values for put_user()

put_user() may return -EFAULT, so, when the user space address is
invalid, the caller should return -EFAULT.

Cc: stable@vger.kernel.org
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Qiang Ma <maqianga@uniontech.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---

diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index 33aefd90d228..20c207d80e31 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -1106,7 +1106,8 @@ static int kvm_loongarch_cpucfg_get_attr(struct kvm_vcpu *vcpu,
 		return -ENXIO;
 	}
 
-	put_user(val, uaddr);
+	if (put_user(val, uaddr))
+		return -EFAULT;
 
 	return ret;
 }