From 81aa3a58b542ed88819115c80a17acd86eacb89d Mon Sep 17 00:00:00 2001
From: Bibo Mao <maobibo@loongson.cn>
Date: Mon, 10 Aug 2026 12:21:57 +0800
Subject: LoongArch: KVM: Fix uninitialized stack variable issue with dmsintc

From: Bibo Mao <maobibo@loongson.cn>

commit 81aa3a58b542ed88819115c80a17acd86eacb89d upstream.

Variable vector[] is declared on stack in function dmsintc_inject_irq()
and sometimes it is used without initialized. Here fix this issue.

Cc: stable@vger.kernel.org
Fixes: 03de5eecb0f0 ("LoongArch: KVM: Add DMSINTC inject msi to vCPU")
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/loongarch/kvm/intc/dmsintc.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/arch/loongarch/kvm/intc/dmsintc.c
+++ b/arch/loongarch/kvm/intc/dmsintc.c
@@ -19,8 +19,7 @@ void dmsintc_inject_irq(struct kvm_vcpu
 
 	for (i = 0; i < 4; i++) {
 		old = atomic64_read(&(ds->vector_map[i]));
-		if (old)
-			vector[i] = atomic64_xchg(&(ds->vector_map[i]), 0);
+		vector[i] = old ? atomic64_xchg(&(ds->vector_map[i]), 0) : 0;
 	}
 
 	if (vector[0]) {