Re: KVM oops in svm_vcpu_run with 2.6.24-rc7

Andi Kleen
2008-01-23T13:03:16Z

On Wednesday 23 January 2008 12:28:06 Avi Kivity wrote:
> Andi Kleen wrote:
> > While starting a kernel
> >
> > Unable to handle kernel NULL pointer dereference at 0000000000000008 RIP:
> > [<ffffffff885698fd>] :kvm_amd:svm_vcpu_run+0x35/0x30d
>
> Can you disassemble svm_vcpu_run() so we see where this ist

Pretty much at the beginning. It's the first reference of the first argument

00000000000008c8 <svm_vcpu_run>:
8c8: 65 8b 0c 25 24 00 00 mov %gs:0x24,%ecx
8cf: 00
8d0: 48 63 c1 movslq %ecx,%rax
8d3: 48 89 fe mov %rdi,%rsi
8d6: 48 c7 c2 00 00 00 00 mov $0x0,%rdx
8dd: 48 8b 04 c5 00 00 00 mov 0x0(,%rax,8),%rax
8e4: 00
8e5: 48 8b 40 08 mov 0x8(%rax),%rax
8e9: 48 8b 3c 02 mov (%rdx,%rax,1),%rdi
8ed: 48 8b 86 f0 0d 00 00 mov 0xdf0(%rsi),%rax
8f4: c6 40 5c 00 movb $0x0,0x5c(%rax)
8f8: 39 4e 40 cmp %ecx,0x40(%rsi)
8fb: 75 0d jne 90a <svm_vcpu_run+0x42>
8fd: 48 8b 47 08 mov 0x8(%rdi),%rax

Last instruction faulted

-Andi