Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed

Hello,


I see the following when try to run qemu from master as the following:

# ./x86_64-softmmu/qemu-system-x86_64 --version
QEMU emulator version 2.8.50 (v2.8.0-1006-g4e9f524)
Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers
# ./x86_64-softmmu/qemu-system-x86_64 -machine accel=kvm -nodefaults
-no-reboot -nographic -cpu host -vga none  -kernel .build.kernel.kvm
-initrd .build.initrd.kvm -append 'panic=1 no-kvmclock console=ttyS0
loglevel=7' -m 1024 -serial stdio
qemu-system-x86_64: /home/matwey/lab/qemu/target/i386/kvm.c:1849:
kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.

First broken commit has been bisected:

commit 48e1a45c3166d659f781171a47dabf4a187ed7a5
Author: Paolo Bonzini <email address hidden>
Date:   Wed Mar 30 22:55:29 2016 +0200

    target-i386: assert that KVM_GET/SET_MSRS can set all requested MSRs
    
    This would have caught the bug in the previous patch.
    
    Signed-off-by: Paolo Bonzini <email address hidden>

My cpuinfo is the following:

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Intel(R) Xeon(R) CPU           X5675  @ 3.07GHz
stepping        : 2
microcode       : 0x14
cpu MHz         : 3066.775
cache size      : 12288 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni pclmulqdq vmx ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor lahf_lm ida arat epb dtherm tpr_shadow vnmi ept vpid
bugs            :
bogomips        : 6133.55
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: