Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=12fa272e315af43d549ce22f9988392d0121350e
Commit: 12fa272e315af43d549ce22f9988392d0121350e
Parent: 26a3e983d154beca544afd36f293cfef10657f24
Author: Nitin A Kamble <[EMAIL PROTECTED]>
AuthorDate: Sat Sep 15 10:43:33 2007 +0300
Committer: Avi Kivity <[EMAIL PROTECTED]>
CommitDate: Sat Oct 13 10:18:29 2007 +0200
KVM: x86 emulator: fix src, dst value initialization
Some operand fetches are less than the machine word size and can result in
stale bits if used together with operands of different sizes.
Signed-off-by: Nitin A Kamble <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
drivers/kvm/x86_emulate.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index cf8db67..7360a71 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -827,6 +827,7 @@ done_prefixes:
srcmem_common:
src.type = OP_MEM;
src.ptr = (unsigned long *)cr2;
+ src.val = 0;
if ((rc = ops->read_emulated((unsigned long)src.ptr,
&src.val, src.bytes, ctxt->vcpu))
!= 0)
goto done;
@@ -891,6 +892,7 @@ done_prefixes:
dst.type = OP_MEM;
dst.ptr = (unsigned long *)cr2;
dst.bytes = (d & ByteOp) ? 1 : op_bytes;
+ dst.val = 0;
if (d & BitOp) {
unsigned long mask = ~(dst.bytes * 8 - 1);
-
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