From: Zhouyi Zhou <zhouzho...@gmail.com>
NULL return of kvmppc_mmu_hpte_cache_next should be handled
Signed-off-by: Zhouyi Zhou <yizhouz...@ict.ac.cn>
Signed-off-by: Alexander Graf <ag...@suse.de>
---
arch/powerpc/kvm/book3s_32_mmu_host.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_32_mmu_host.c
b/arch/powerpc/kvm/book3s_32_mmu_host.c
index 3a0abd2..5fac89d 100644
--- a/arch/powerpc/kvm/book3s_32_mmu_host.c
+++ b/arch/powerpc/kvm/book3s_32_mmu_host.c
@@ -243,6 +243,11 @@ next_pteg:
/* Now tell our Shadow PTE code about the new page */
pte = kvmppc_mmu_hpte_cache_next(vcpu);
+ if (!pte) {
+ kvm_release_pfn_clean(hpaddr >> PAGE_SHIFT);
+ r = -EAGAIN;
+ goto out;
+ }
dprintk_mmu("KVM: %c%c Map 0x%llx: [%lx] 0x%llx (0x%llx) -> %lx\n",
orig_pte->may_write ? 'w' : '-',
--
1.8.1.4
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