KVM: x86 emulator: limit instructions to 15 bytes

While we are never normally passed an instruction that exceeds 15 bytes,
smp games can cause us to attempt to interpret one, which will cause
large latencies in non-preempt hosts.

Cc: stable@kernel.org
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h
index b7ed2c423116..7c18e1230f54 100644
--- a/arch/x86/include/asm/kvm_emulate.h
+++ b/arch/x86/include/asm/kvm_emulate.h
@@ -129,7 +129,7 @@ struct decode_cache {
         u8 seg_override;
         unsigned int d;
         unsigned long regs[NR_VCPU_REGS];
-        unsigned long eip;
+        unsigned long eip, eip_orig;
         /* modrm */
         u8 modrm;
         u8 modrm_mod;