Bug 694378

Since RHEL 6.1 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.

Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.

Hello Mike,

I have two questions:
 - who is the guest, 
 - what is the entire command line?

Best regards,
Vadim.

(In reply to comment #4)
> Hello Mike,
> 
> I have two questions:
>  - who is the guest,
RHEL5.7 64 bit guest 
I think all the linux guest with -device virtio-balloon-pci,id=balloon0  will hit the issue

>  - what is the entire command line?
/usr/libexec/qemu-kvm -M rhel6.1.0 -enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name RHEL5u7 -uuid d1356948-d6b2-c328-75c0-5746606f5f34 -rtc base=utc -boot c -drive file=/home/RHEL-Server-5.7-64-virtio.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,aio=threads -device virtio-blk-pci,drive=drive-virtio-disk0,id=virtio-disk0 -netdev tap,id=hostnet0,vhost=on -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:62:64:55 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -usb -vnc 0:0 -vga cirrus -device virtio-balloon-pci,id=balloon0 -monitor stdio

> 
> Best regards,
> Vadim.

(In reply to comment #5)
> (In reply to comment #4)
> > Hello Mike,
> > 
> > I have two questions:
> >  - who is the guest,
> RHEL5.7 64 bit guest 
> I think all the linux guest with -device virtio-balloon-pci,id=balloon0  will
> hit the issue
> 
Will check it.
Thank you,
Vadim.

Patches posted upstream.

reproduce on qemu-kvm-0.12.1.2-2.159.el6.x86_64
verify on qemu-kvm-0.12.1.2-2.182.el6.x86_64

steps to reproduce
1. /usr/libexec/qemu-kvm -enable-kvm -m 6G -smp 4 -name rhel6 -uuid ddcbfb49-3411-1701-3c36-6bdbc00bedb9 -rtc base=utc,clock=host,driftfix=slew -boot c -drive file=/dev/migrate/data3,if=none,id=drive-ide0-0-0,boot=on,format=qcow2,cache=none -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,physical_block_size=4096,logical_block_size=4096 -netdev tap,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:50:a4:c2:c2 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -device usb-tablet,id=input0 -spice id=on,disable-ticketing,port=5912 -monitor stdio -device virtio-balloon-pci,id=balloon0

2. (qemu) balloon 0

actual results:
on qemu-kvm-0.12.1.2-2.159.el6.x86_64
(qemu) balloon 0
*** glibc detected *** /usr/libexec/qemu-kvm: corrupted double-linked list: 0x000000000312f0b0 ***

on qemu-kvm-0.12.1.2-2.182.el6.x86_64
(qemu) balloon 0
Parameter 'target' expects a size and guest work well

Based on above ,this issue has been fixed.

> 2. (qemu) balloon 0
> 
> actual results:
> on qemu-kvm-0.12.1.2-2.159.el6.x86_64
> (qemu) balloon 0
> *** glibc detected *** /usr/libexec/qemu-kvm: corrupted double-linked list:
> 0x000000000312f0b0 ***
> 
> on qemu-kvm-0.12.1.2-2.182.el6.x86_64
> (qemu) balloon 0
> Parameter 'target' expects a size and guest work well
> 
> Based on above ,this issue has been fixed.

Also tried "negative number" and supper max number.

result:
Parameter 'target' expects a size

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Invalid balloon values, like 0, used to crash QEMU.  The fix is to validate input.  After the fix, QEMU doesn't crash on invalid input.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1531.html