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Date: Wed, 26 Jun 2019 20:39:08 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Dave Martin <Dave.Martin@....com>, Andre Przywara <andre.przywara@....com>, Marc Zyngier <marc.zyngier@....com>, Sasha Levin <sashal@...nel.org>, kvmarm@...ts.cs.columbia.edu Subject: [PATCH AUTOSEL 4.14 20/35] KVM: arm/arm64: vgic: Fix kvm_device leak in vgic_its_destroy From: Dave Martin <Dave.Martin@....com> [ Upstream commit 4729ec8c1e1145234aeeebad5d96d77f4ccbb00a ] kvm_device->destroy() seems to be supposed to free its kvm_device struct, but vgic_its_destroy() is not currently doing this, resulting in a memory leak, resulting in kmemleak reports such as the following: unreferenced object 0xffff800aeddfe280 (size 128): comm "qemu-system-aar", pid 13799, jiffies 4299827317 (age 1569.844s) [...] backtrace: [<00000000a08b80e2>] kmem_cache_alloc+0x178/0x208 [<00000000dcad2bd3>] kvm_vm_ioctl+0x350/0xbc0 Fix it. Cc: Andre Przywara <andre.przywara@....com> Fixes: 1085fdc68c60 ("KVM: arm64: vgic-its: Introduce new KVM ITS device") Signed-off-by: Dave Martin <Dave.Martin@....com> Signed-off-by: Marc Zyngier <marc.zyngier@....com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- virt/kvm/arm/vgic/vgic-its.c | 1 + 1 file changed, 1 insertion(+) diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index dc06f5e40041..526d808ecbbd 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -1677,6 +1677,7 @@ static void vgic_its_destroy(struct kvm_device *kvm_dev) mutex_unlock(&its->its_lock); kfree(its); + kfree(kvm_dev);/* alloc by kvm_ioctl_create_device, free by .destroy */ } int vgic_its_has_attr_regs(struct kvm_device *dev, -- 2.20.1
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