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emin_int11

GRUB (b00tloader) (b) backspace storm

emin_int11
Dec 17th, 2015
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  1. Guest VM (the GRUB ask you the username) has encountered an error while pressing 28 times the backspace. The instruction pointer (%eip) points to `00000003` (invalid address) and also cs (code segment) register containing address of code selector segment `0008`.
  2.  
  3. CPU state
  4.  
  5. 00:00:20.338484 !! {cpumguest, verbose}
  6. 00:00:20.338485 !!
  7. 00:00:20.338490 Guest CPUM (VCPU 0) state:
  8. 00:00:20.338500 eax=0007f678 ebx=0000000d ecx=00000003 edx=0007f678 esi=00000000 edi=00000000
  9. 00:00:20.338502 eip=00000003 esp=0007f680 ebp=00000000 iopl=0 rf nv up di pl zr na pe nc
  10. 00:00:20.338503 cs={0008 base=0000000000000000 limit=ffffffff flags=0000c09b} dr0=00000000 dr1=00000000
  11. 00:00:20.338506 ds={0010 base=0000000000000000 limit=ffffffff flags=0000c093} dr2=00000000 dr3=00000000
  12. 00:00:20.338508 es={0010 base=0000000000000000 limit=ffffffff flags=0000c093} dr4=00000000 dr5=00000000
  13. 00:00:20.338510 fs={0010 base=0000000000000000 limit=ffffffff flags=0000c093} dr6=ffff0ff0 dr7=00000400
  14. 00:00:20.338512 gs={0010 base=0000000000000000 limit=ffffffff flags=0000c093} cr0=00000011 cr2=00000000
  15. 00:00:20.338513 ss={0010 base=0000000000000000 limit=ffffffff flags=0000c093} cr3=00000000 cr4=00000000
  16. 00:00:20.338515 gdtr=0000000000008280:0027 idtr=0000000000000000:0000 eflags=00210002
  17. 00:00:20.338517 ldtr={0000 base=00000000 limit=0000ffff flags=00000082}
  18. 00:00:20.338518 tr ={0000 base=00000000 limit=0000ffff flags=0000008b}
  19. 00:00:20.338519 SysEnter={cs=0000 eip=00000000 esp=00000000}
  20. 00:00:20.338604 xcr=0000000000000001 xcr1=0000000000000000 xss=0000000000000000 (fXStateMask=0000000000000000)
  21. 00:00:20.338611 FCW=037f FSW=0000 FTW=0000 FOP=0000 MXCSR=00001f80 MXCSR_MASK=0000ffff
  22. 00:00:20.338613 FPUIP=00000000 CS=0000 Rsrvd1=0000 FPUDP=00000000 DS=0000 Rsvrd2=0000
  23. 00:00:20.338631 ST(0)=FPR0={0000'00000000'00000000} t0 +0.0000000000000000000000 ^ 0 (*)
  24. 00:00:20.338645 ST(1)=FPR1={0000'00000000'00000000} t0 +0.0000000000000000000000 ^ 0 (*)
  25. 00:00:20.338658 ST(2)=FPR2={0000'00000000'00000000} t0 +0.0000000000000000000000 ^ 0 (*)
  26. 00:00:20.338670 ST(3)=FPR3={0000'00000000'00000000} t0 +0.0000000000000000000000 ^ 0 (*)
  27. 00:00:20.338682 ST(4)=FPR4={0000'00000000'00000000} t0 +0.0000000000000000000000 ^ 0 (*)
  28. 00:00:20.338695 ST(5)=FPR5={0000'00000000'00000000} t0 +0.0000000000000000000000 ^ 0 (*)
  29. 00:00:20.338707 ST(6)=FPR6={0000'00000000'00000000} t0 +0.0000000000000000000000 ^ 0 (*)
  30. 00:00:20.338719 ST(7)=FPR7={0000'00000000'00000000} t0 +0.0000000000000000000000 ^ 0 (*)
  31. 00:00:20.338731 XMM0 =00000000'00000000'00000000'00000000 XMM1 =00000000'00000000'00000000'00000000
  32. 00:00:20.338746 XMM2 =00000000'00000000'00000000'00000000 XMM3 =00000000'00000000'00000000'00000000
  33. 00:00:20.338760 XMM4 =00000000'00000000'00000000'00000000 XMM5 =00000000'00000000'00000000'00000000
  34. 00:00:20.338774 XMM6 =00000000'00000000'00000000'00000000 XMM7 =00000000'00000000'00000000'00000000
  35. 00:00:20.338788 XMM8 =00000000'00000000'00000000'00000000 XMM9 =00000000'00000000'00000000'00000000
  36. 00:00:20.338802 XMM10=00000000'00000000'00000000'00000000 XMM11=00000000'00000000'00000000'00000000
  37. 00:00:20.338815 XMM12=00000000'00000000'00000000'00000000 XMM13=00000000'00000000'00000000'00000000
  38. 00:00:20.338829 XMM14=00000000'00000000'00000000'00000000 XMM15=00000000'00000000'00000000'00000000
  39. 00:00:20.338842 EFER =0000000000000000
  40. 00:00:20.338843 PAT =0007040600070406
  41. 00:00:20.338844 STAR =0000000000000000
  42. 00:00:20.338844 CSTAR =0000000000000000
  43. 00:00:20.338845 LSTAR =0000000000000000
  44. 00:00:20.338845 SFMASK =0000000000000000
  45. 00:00:20.338846 KERNELGSBASE =0000000000000000
  46. 00:00:20.338859 !!
  47. 00:00:20.338859 !! {cpumguestinstr, verbose}
  48. 00:00:20.338860 !!
  49. 00:00:20.338905
  50. 00:00:20.338905 CPUM: 0008:00000003 f0 53 Illegal opcode (Cpu monitor)
  51.  
  52.  
  53. ==========================================================================================================
  54. 00:09:18.411791 ***
  55. 00:09:18.411796 Guest paging mode: Protected (changed 959455 times), A20 enabled (changed 2 times)
  56. 00:09:18.411799 Shadow paging mode: EPT
  57. 00:09:18.411800 Host paging mode: AMD64+G+NX
  58. 00:09:18.411800 ***
  59. 00:09:18.411806 Active Timers (pVM=00007f70f7bdf000)
  60. 00:09:18.411808 pTimerR3 offNext offPrev offSched Clock Time Expire HzHint State Description
  61. 00:09:18.411812 00007f70aaef7290 00013490 00000000 00000000 Real 77744128 77510030 0 2-ACTIVE VGA Refresh Timer
  62. 00:09:18.411817 00007f70aaf0a720 ffffff80 fffecb70 00000000 Real 77744128 77510033 0 2-ACTIVE EMT Yielder
  63. 00:09:18.411821 00007f70aaf0a6a0 fffd6790 00000080 00000000 Real 77744128 77510400 0 2-ACTIVE CPU Load Timer
  64. 00:09:18.411824 00007f70aaee0e30 00000000 00029870 00000000 Real 77744128 77510518 0 2-ACTIVE PS2K Typematic Timer
  65. 00:09:18.411828 00007f70aaf061d0 00000000 00000000 00000000 Virt 321650206790 321647824243 0 2-ACTIVE DevIchAc97
  66. 00:09:18.411832 00007f70aaee2b00 000005e0 00000000 00000000 VrSy 321649574596 321673997747 18 2-ACTIVE i8254 Programmable Interval Timer
  67. 00:09:18.411835 00007f70aaee30e0 00026690 fffffa20 00000000 VrSy 321649574596 321990000000 0 2-ACTIVE MC146818 RTC/CMOS - Second
  68. 00:09:18.411839 00007f70aaf09770 00000000 fffd9970 00000000 VrSy 321649574596 912207558929 0 2-ACTIVE ACPI PM Timer
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