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KVM: PPC: NULL return of kvmppc_mmu_hpte_cache_next should be handled
author
Zhouyi Zhou
<zhouzhouyi@gmail.com>
Mon, 2 Dec 2013 10:21:58 +0000
(18:21 +0800)
committer
Alexander Graf
<agraf@suse.de>
Thu, 9 Jan 2014 09:15:11 +0000
(10:15 +0100)
NULL return of kvmppc_mmu_hpte_cache_next should be handled
Signed-off-by: Zhouyi Zhou <yizhouzhou@ict.ac.cn>
Signed-off-by: Alexander Graf <agraf@suse.de>
arch/powerpc/kvm/book3s_32_mmu_host.c
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diff --git
a/arch/powerpc/kvm/book3s_32_mmu_host.c
b/arch/powerpc/kvm/book3s_32_mmu_host.c
index
3a0abd2
..
5fac89d
100644
(file)
--- 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' : '-',