Bug 508001

Summary:	Segmentation fault when reboot vm after hotplug and hot remove nic
Product:	Red Hat Enterprise Linux 5	Reporter:	Suqin Huang <shuang>
Component:	kvm	Assignee:	Glauber Costa <gcosta>
Status:	CLOSED WONTFIX	QA Contact:	Lawrence Lim <llim>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.5	CC:	lihuang, markmc, ovirt-maint, tburke, tools-bugs, virt-maint, ykaul
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-11-30 22:58:19 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	580948

Description Suqin Huang 2009-06-25 04:52:45 UTC

Description of problem:
Segmentation fault when reboot vm after hotplug and hotunplug nic.

Version-Release number of selected component (if applicable):
Red Hat Enterprise Virtualization Hypervisor release 5.4-2.0.99 (7.1)
kvm-83-77.el5

How reproducible:
most of time

Steps to Reproduce:

1. command used:
#/usr/libexec/qemu-kvm -no-hpet -rtc-td-hack -smp 4 -m 2G -uuid `uuidgen` -net nic,model=e1000,macaddr=00:1a:4a:16:97:86,vlan=0 -net tap,vlan=0,script=/etc/qemu-ifup -drive file=RHEL-5.4-64.qcow2,if=ide -boot c -vnc :10 -monitor stdio
2. #modprobe acpiphp
3. (qemu) pci_add pci_addr=auto nic vlan=0,model=virtio
4. (qemu)pci_del pci_addr=4
5. reboot vm

segmentation fault:

#0  0x00000000000004a0 in ?? ()
#1  0x00000000004160fb in virtio_reset (opaque=<value optimized out>)
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/hw/virtio.c:500
#2  0x00000000004075f6 in qemu_system_reset ()
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/vl.c:3759
#3  0x00000000005166e2 in qemu_kvm_system_reset ()
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/qemu-kvm.c:375
#4  0x0000000000516855 in kvm_main_loop ()
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/qemu-kvm.c:605
#5  0x000000000040e415 in main (argc=21, argv=0x7fff62b12a08, 
    envp=<value optimized out>)
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/vl.c:3967


#0  0x0000000000470374 in qemu_set_irq (irq=0x430610, level=0)
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/hw/irq.c:38
#1  0x00000000004075f6 in qemu_system_reset ()
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/vl.c:3759
#2  0x00000000005166e2 in qemu_kvm_system_reset ()
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/qemu-kvm.c:375
#3  0x0000000000516855 in kvm_main_loop ()
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/qemu-kvm.c:605
#4  0x000000000040e415 in main (argc=21, argv=0x7fffd4b4c418, 
    envp=<value optimized out>)
    at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/vl.c:3967


boot model=virtio/rtl8139, hotplug/hotunplug e1000/rtl8139/virtio also have this issue.

  
Actual results:


Expected results:


Additional info:

guest info:
rhel5.4-64

Comment 1 Mark McLoughlin 2009-10-29 13:59:55 UTC

Looks like we need qemu_unregister_reset() backported