KVM internal crash

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

I see the following error 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

RHEL 6.6 and qemu-kvm 0.12 are *very* old, can't you update the machine to a newer version? At least RHEL 6.10, or even better RHEL 7 or 8?

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



[Expired for QEMU because there has been no activity for 60 days.]