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authorPaul Mackerras <paulus@samba.org>2012-11-21 23:29:12 +0000
committerAlexander Graf <agraf@suse.de>2012-12-06 01:33:59 +0100
commit05dd85f7933ffbe6d71415e631c95ca615ae1e81 (patch)
tree692796f7f43064301bd7d06167b2024ed9b11595 /arch/powerpc
parenta64fd707481631b9682f9baeefac489bc55bbf73 (diff)
downloadop-kernel-dev-05dd85f7933ffbe6d71415e631c95ca615ae1e81.zip
op-kernel-dev-05dd85f7933ffbe6d71415e631c95ca615ae1e81.tar.gz
KVM: PPC: Book3S HV: Report correct HPT entry index when reading HPT
This fixes a bug in the code which allows userspace to read out the contents of the guest's hashed page table (HPT). On the second and subsequent passes through the HPT, when we are reporting only those entries that have changed, we were incorrectly initializing the index field of the header with the index of the first entry we skipped rather than the first changed entry. This fixes it. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kvm/book3s_64_mmu_hv.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 1029e22..ac6b5ac 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -1282,7 +1282,6 @@ static ssize_t kvm_htab_read(struct file *file, char __user *buf,
while (nb + sizeof(hdr) + HPTE_SIZE < count) {
/* Initialize header */
hptr = (struct kvm_get_htab_header __user *)buf;
- hdr.index = i;
hdr.n_valid = 0;
hdr.n_invalid = 0;
nw = nb;
@@ -1298,6 +1297,7 @@ static ssize_t kvm_htab_read(struct file *file, char __user *buf,
++revp;
}
}
+ hdr.index = i;
/* Grab a series of valid entries */
while (i < kvm->arch.hpt_npte &&
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