Bug 707813
| Summary: | Got segmentation fault after 300 times hot-unplug/plug NIC of windows guest | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Qunfang Zhang <qzhang> |
| Component: | kvm | Assignee: | Alex Williamson <alex.williamson> |
| Status: | CLOSED WONTFIX | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5.7 | CC: | bcao, gcosta, juzhang, michen, mkenneth, virt-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-07-27 19:07:24 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 of problem: As subject, after 300 times hot unplug then hot plug, guest got segmentation fault. For RHEL guest, did not meet this issue. Version-Release number of selected component (if applicable): kernel-2.6.18-262.el5 kvm-83-235.el5 How reproducible: 2/3 Steps to Reproduce: 1.Boot a windows guest. /usr/libexec/qemu-kvm -no-hpet -no-kvm-pit-reinjection -usbdevice tablet -rtc-td-hack -startdate now -name win7-32 -smp 4,cores=4 -k en-us -m 3G -boot c -net nic,vlan=1,macaddr=00:1a:4a:42:49:10,model=virtio -net tap,vlan=1,ifname=virtio_10_1,script=/etc/qemu-ifup,downscript=no -drive file=/mnt/win7-32-sp1-qcow2,media=disk,if=virtio,cache=off,boot=on,format=qcow2,werror=stop -cpu qemu64,+sse2 -M rhel5.6.0 -notify all -balloon none -spice host=0,ic=on,port=5930,disable-ticketing -qxl 1 -net tap,vlan=2,ifname=virtio_10_2,script=/etc/qemu-ifup,downscript=no -monitor unix:/tmp/aaa,server,nowait (qemu) info network info network VLAN 1 devices: tap.0: ifname=virtio_10_1,script=/etc/qemu-ifup,downscript=no virtio.0: model=virtio,macaddr=00:1a:4a:42:49:10 VLAN 2 devices: tap.1: ifname=virtio_10_2,script=/etc/qemu-ifup,downscript=no 2. In host: #for ((i=1;i<=300;i++)); do echo pci_add pci_addr=0x06 nic vlan=2,model=virtio | nc -U /tmp/aaa;sleep 4; echo pci_del pci_addr=0x06|nc -U /tmp/aaa ;echo $i; sleep 4; done 3. Actual results: Guest got segmentation fault after 300 times hotplug/unplug. Expected results: Guest works well. Additional info: Program received signal SIGSEGV, Segmentation fault. 0x0000000000415eae in virtio_update_irq (vdev=0x1dfdd60) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/hw/virtio.c:485 485 qemu_set_irq(vdev->pci_dev.irq[0], vdev->isr & 1); (gdb) (gdb) bt #0 0x0000000000415eae in virtio_update_irq (vdev=0x1dfdd60) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/hw/virtio.c:485 #1 0x0000000000415fdb in virtio_reset (opaque=<value optimized out>) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/hw/virtio.c:500 #2 0x0000000000407766 in qemu_system_reset () at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/vl.c:3942 #3 0x0000000000501196 in qemu_kvm_system_reset () at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/qemu-kvm.c:369 #4 kvm_main_loop () at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/qemu-kvm.c:604 #5 0x000000000040e757 in main_loop (argc=40, argv=0x7fffffffe598, envp=<value optimized out>) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/vl.c:4157 #6 main (argc=40, argv=0x7fffffffe598, envp=<value optimized out>) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/vl.c:6559 (gdb)