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KVM: x86 emulator: limit instructions to 15 bytes

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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>
This commit is contained in:
Avi Kivity
2009-11-24 15:20:15 +02:00
parent d7b0b5eb30
commit eb3c79e64a
2 changed files with 5 additions and 2 deletions
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2
arch/x86/include/asm/kvm_emulate.h
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@@ -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;