From: Bibo Mao <maobibo@loongson.cn>
Date: Thu, 11 Jun 2026 12:46:40 +0000 (+0800)
Subject: LoongArch: KVM: Check irq validity in kvm_vcpu_ioctl_interrupt()
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=09b318ab77b7a4fc9987fd98d1525fc55ddc2617;p=thirdparty%2Fkernel%2Flinux.git

LoongArch: KVM: Check irq validity in kvm_vcpu_ioctl_interrupt()

Function kvm_vcpu_ioctl_interrupt() can be called from userspace, here
add irq validility cheking in kvm_vcpu_ioctl_interrupt().

Cc: stable@vger.kernel.org
Fixes: f45ad5b8aa93 ("LoongArch: KVM: Implement vcpu interrupt operations")
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---

diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index ab0b0da270ca..4235bf8e455e 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -1452,6 +1452,10 @@ done:
 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 {
 	int intr = (int)irq->irq;
+	unsigned int vector = abs(intr);
+
+	if (vector >= EXCCODE_INT_NUM)
+		return -EINVAL;
 
 	if (intr > 0)
 		kvm_queue_irq(vcpu, intr);