[Bug 1877526] Re: KVM internal crash

[Prashant]

Unfortunately, I am not is a position to upgraded (due to various reasons).
The case passes with RHEL 7.3, so, but I need to find the issue RHEL 6.6. (to 
be sure I don't the bug 
is NOT in my code).

Is there a way that I can keep patching the KVM up to the newer
versions, and then, find the version where the issue is fixed.

May be that helps.

And how do analyse this error info.

Regards,
Prashant

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https://bugs.launchpad.net/bugs/1877526

Title:
  KVM internal crash

Status in QEMU:
  Incomplete

Bug description:
  Hi,
  I am new to this. (apologies if I miss something)

  I see the following error on my host mc when I run an application on
  my QEMU based VM running ubuntu linux:

  Code=4d 39 c8 7f 64 0f 1f 40 00 4d 8d 40 80 49 81 f8 80 00 00 00 <66> 0f 7f 
07 66 0f 7f 47 10 66 0f 7f 47 20 66 0f 7f 47 30
  66 0f 7f 47 40 66 0f 7f 47 50 66
  KVM internal error. Suberror: 1
  emulation failure
  RAX=00007fffeb85a000 RBX=00000000069ee400 RCX=0000000000000000 
RDX=0000000000000000
  RSI=0000000000000000 RDI=00007fffeb85a000 RBP=00007fffffff9570 
RSP=00007fffffff9548
  R8 =0000000000000f80 R9 =0000000001000000 R10=0000000000000000 
R11=0000003694e83f3a
  R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 
R15=0000000006b75350
  RIP=0000003694e8443b RFL=00010206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0
  ES =0000 0000000000000000 ffffffff 00000000
  CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA]
  SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS   [-WA]
  DS =0000 0000000000000000 ffffffff 00000000
  FS =0000 00007ffff45b5720 ffffffff 00000000
  GS =0000 0000000000000000 ffffffff 00000000
  LDT=0000 0000000000000000 ffffffff 00000000
  TR =0040 ffff88047fd13140 00002087 00008b00 DPL=0 TSS64-busy
  GDT=   ffff88047fd04000 0000007f
  IDT=   ffffffffff57c000 00000fff
  CR0=80050033 CR2=00007ffff7ff4000 CR3=000000046cb38000 CR4=000006e0
  DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 
DR3=0000000000000000
  DR6=00000000ffff0ff0 DR7=0000000000000400
  EFER=0000000000000d01

  This occurs with qemu-kvm version(host m/c has RHEL 6.6) :
  Name        : qemu-kvm
  Arch        : x86_64
  Epoch       : 2
  Version     : 0.12.1.2
  Release     : 2.506.el6_10.7

  I have another m/c with RHEL 7.5, and the same test case passes with the 
1.5.3 version.
  yum info qemu-kvm
  Name        : qemu-kvm
  Arch        : x86_64
  Epoch       : 10
  Version     : 1.5.3

  How do I investigate this?
  I would need to patch up the qemu-kvm on the host to get this fixed, I think.

  Please let me know if I need to provide more info, (and what?)

  Regards,
  Prashant

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