Yang, Sheng wrote:
From: Sheng Yang <[EMAIL PROTECTED]>
Date: Mon, 1 Sep 2008 17:28:59 +0800
Subject: [PATCH] KVM: MMU: Fix overflow of SHADOW_PT_INDEX with EPT in 32pae
EPT is 4 level by default in 32pae (48bits), but virtual address only
got 32 bits. This result in SHADOW_PT_INDEX() overflow when try to
fetch level 4 index.
Fix it by extend virtual address to 64bits in any condition.
Good catch.
Signed-off-by: Sheng Yang <[EMAIL PROTECTED]>
---
arch/x86/kvm/mmu.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index f33c594..8ca9aad 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -943,6 +943,7 @@ static int walk_shadow(struct kvm_shadow_walk *walker,
int level;
int r;
u64 *sptep;
+ u64 ext_addr = addr;
addr isn't really a gva_t; it is a pga_t when using direct mappings.
So how about changing walk_shadow() and its callbacks to use u64 instead
of gva_t instead?
--
error compiling committee.c: too many arguments to function
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