linux-kernel - [PATCH 4.14 084/164] KVM: arm/arm64: vgic-irqfd: Fix MSI entry allocation

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Date:   Tue, 12 Dec 2017 13:44:24 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        AKASHI Takahiro <takahiro.akashi@...aro.org>,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Marc Zyngier <marc.zyngier@....com>
Subject: [PATCH 4.14 084/164] KVM: arm/arm64: vgic-irqfd: Fix MSI entry allocation

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Marc Zyngier <marc.zyngier@....com>

commit 150009e2c70cc3c6e97f00e7595055765d32fb85 upstream.

Using the size of the structure we're allocating is a good idea
and avoids any surprise... In this case, we're happilly confusing
kvm_kernel_irq_routing_entry and kvm_irq_routing_entry...

Fixes: 95b110ab9a09 ("KVM: arm/arm64: Enable irqchip routing")
Reported-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
Reviewed-by: Christoffer Dall <christoffer.dall@...aro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Signed-off-by: Christoffer Dall <christoffer.dall@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 virt/kvm/arm/vgic/vgic-irqfd.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/virt/kvm/arm/vgic/vgic-irqfd.c
+++ b/virt/kvm/arm/vgic/vgic-irqfd.c
@@ -112,8 +112,7 @@ int kvm_vgic_setup_default_irq_routing(s
 	u32 nr = dist->nr_spis;
 	int i, ret;
 
-	entries = kcalloc(nr, sizeof(struct kvm_kernel_irq_routing_entry),
-			  GFP_KERNEL);
+	entries = kcalloc(nr, sizeof(*entries), GFP_KERNEL);
 	if (!entries)
 		return -ENOMEM;