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When starting a guest and copying host vendor cpuid to the guest cpu, libvirtd would crash if the host cpu contained a NULL vendor field. Avoid the crash by checking for a valid vendor in the host cpu before copying the cpuid to the guest cpu. For completeness, here is a backtrace from the crash (gdb) bt f0 0x00007ffff739bf33 in x86DataCpuid (cpuid=0x8, cpuid=0x8, data=data@entry=0x7fffb800ee78) at cpu/cpu_x86.c:287 f1 virCPUx86DataAddCPUID (data=data@entry=0x7fffb800ee78, cpuid=0x8) at cpu/cpu_x86.c:355 f2 0x00007ffff739ef47 in x86Compute (host=<optimized out>, cpu=0x7fffb8000cc0, guest=0x7fffecca7348, message=<optimized out>) at cpu/cpu_x86.c:1580 f3 0x00007fffd2b38e53 in qemuBuildCpuModelArgStr (migrating=false, hasHwVirt=<synthetic pointer>, qemuCaps=0x7fffb8001040, buf=0x7fffecca7360, def=0x7fffc400ce20, driver=0x1c) at qemu/qemu_command.c:6283 f4 qemuBuildCpuCommandLine (cmd=cmd@entry=0x7fffb8002f60, driver=driver@entry=0x7fffc80882c0, def=def@entry=0x7fffc400ce20, qemuCaps=qemuCaps@entry=0x7fffb8001040, migrating=<optimized out>) at qemu/qemu_command.c:6445 (gdb) f2 (gdb) p *host_model $23 = {name = 0x7fffb800ec50 "qemu64", vendor = 0x0, signature = 0, data = { len = 2, data = 0x7fffb800e720}} |
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cpu_arm.c | ||
cpu_arm.h | ||
cpu_map.c | ||
cpu_map.h | ||
cpu_map.xml | ||
cpu_ppc64_data.h | ||
cpu_ppc64.c | ||
cpu_ppc64.h | ||
cpu_s390.c | ||
cpu_s390.h | ||
cpu_x86_data.h | ||
cpu_x86.c | ||
cpu_x86.h | ||
cpu.c | ||
cpu.h |