[PATCH] kvm: x86: mmu: fix memoryleak in kvm_mmu_vendor_module_init()

[Miaohe Lin]

When register_shrinker() fails, we forgot to release the percpu counter
kvm_total_used_mmu_pages leading to memoryleak. Fix this issue by calling
percpu_counter_destroy() when register_shrinker() fails.

Fixes: ab271bd4dfd5 ("x86: kvm: propagate register_shrinker return code")
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
---
 arch/x86/kvm/mmu/mmu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index e418ef3ecfcb..d25d55b1f0b5 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -6702,10 +6702,12 @@ int kvm_mmu_vendor_module_init(void)
 
 	ret = register_shrinker(&mmu_shrinker, "x86-mmu");
 	if (ret)
-		goto out;
+		goto out_shrinker;
 
 	return 0;
 
+out_shrinker:
+	percpu_counter_destroy(&kvm_total_used_mmu_pages);
 out:
 	mmu_destroy_caches();
 	return ret;
-- 
2.23.0