Bug 595612
| Summary: | Vhost_net: Segfault occurred during guest reboot | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Amos Kong <akong> |
| Component: | qemu-kvm | Assignee: | Virtualization Maintenance <virt-maint> |
| Status: | CLOSED DUPLICATE | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 6.0 | CC: | ailan, amit.shah, gyue, virt-maint |
| 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: | 2010-05-25 09:28:42 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: | |||
*** This bug has been marked as a duplicate of bug 585940 *** |
Description of problem: Boot up a rhel6 guest with 'vhost=on' option, and execute 'reboot' command, segfault occurred. When boot up with 'vhost=off' option, bug could not be reproduced. If use original option(-net tap,vlan=0,ifname=virtio_0_6001,script....), this bug doesn't exist. Command line ('vhost=on'): /root/vhost/client/tests/kvm/qemu -name 'vm1' -monitor tcp:0:6001,server,nowait -drive file=/root/vhost/client/tests/kvm/images/RHEL-Server-6.0-64-virtio.qcow2,if=ide,cache=none,boot=on -net nic,vlan=0,netdev=foo_6001,model=virtio,macaddr=02:A9:7C:6C:b3:74 -netdev tap,id=foo_6001,vhost=on,ifname=virtio_0_6001,script=/root/vhost/client/tests/kvm/scripts/qemu-ifup-switch,downscript=no -m 4096 -smp 2 -soundhw ac97 -usbdevice tablet -rtc-td-hack -no-hpet -cpu qemu64,+sse2 -no-kvm-pit-reinjection -redir tcp:5000::22 -vnc :0 -serial unix:/tmp/serial-20100525-144754-R4GR,server,nowait Original command line: # /root/vhost/client/tests/kvm/qemu -name 'vm1' -monitor tcp:0:6001,server,nowait -drive file=/root/vhost/client/tests/kvm/images/RHEL-Server-6.0-64-virtio.qcow2,if=ide,cache=none,boot=on -net nic,vlan=0,model=virtio,macaddr=02:A9:7C:6C:b3:74 -net tap,vlan=0,ifname=virtio_0_6001,script=/root/vhost/client/tests/kvm/scripts/qemu-ifup-switch,downscript=no -m 4096 -smp 2 -soundhw ac97 -usbdevice tablet -rtc-td-hack -no-hpet -cpu qemu64,+sse2 -no-kvm-pit-reinjection -redir tcp:5000::22 -vnc :0 -serial unix:/tmp/serial-20100525-144754-R4GR,server,nowait Version-Release number of selected component (if applicable): guest kernel:2.6.32-22.el6.x86_64 host kernel:2.6.32-25.el6.x86_64 # rpm -qa |grep qemu gpxe-roms-qemu-0.9.7-6.2.el6.noarch qemu-kvm-0.12.1.2-2.62.el6.x86_64 qemu-img-0.12.1.2-2.62.el6.x86_64 qemu-kvm-tools-0.12.1.2-2.62.el6.x86_64 qemu-kvm-debuginfo-0.12.1.2-2.62.el6.x86_64 How reproducible: always Steps to Reproduce: 1.boot up a rhel6 guest with 'vhost=on' option 2.check if guest network works # ping www.redhat.com 3.reboot guest # reboot Actual results: segfault occurred Expected results: guest can reboot successfully Additional info: 1. vhost_net module has been loaded. host)#lsmod |grep vhost_net vhost_net 22833 1 macvtap 7573 1 vhost_net tun 16295 3 vhost_net 2. core-dump: Program received signal SIGSEGV, Segmentation fault. event_notifier_get_fd (e=0x48) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/event_notifier.c:38 38 { (gdb) bt #0 event_notifier_get_fd (e=0x48) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/event_notifier.c:38 #1 0x00000000004208ff in virtio_pci_mask_notifier (dev=0x2d21cc0, vector=1, opaque=0x0, masked=1) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/virtio-pci.c:410 #2 0x000000000042b961 in msix_set_mask_notifier (dev=0x2d21cc0, vector=1, opaque=0x0) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/msix.c:618 #3 0x000000000041fedc in virtio_pci_set_guest_notifier (opaque=0x2d21cc0, n=0, assign=false) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/virtio-pci.c:442 #4 0x00000000004224cf in vhost_virtqueue_cleanup (dev=0x18a0ff0, vdev=0x2d32010, vq=0x18a1068, idx=0) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/vhost.c:573 #5 0x00000000004228db in vhost_dev_stop (hdev=0x18a0ff0, vdev=0x2d32010) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/vhost.c:701 #6 0x00000000004221e9 in vhost_net_stop (net=0x18a0ff0, dev=0x2d32010) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/vhost_net.c:162 #7 0x000000000041f942 in virtio_net_reset (vdev=<value optimized out>) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/virtio-net.c:123 #8 0x0000000000575eaf in virtio_reset (opaque=0x2d32010) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/virtio.c:447 #9 0x0000000000420aa0 in virtio_pci_reset (d=0x2d21cc0) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/virtio-pci.c:170 #10 0x000000000040901a in qemu_system_reset () at /usr/src/debug/qemu-kvm-0.12.1.2/vl.c:3455 #11 0x0000000000428291 in qemu_kvm_system_reset () at /usr/src/debug/qemu-kvm-0.12.1.2/qemu-kvm.c:1868 #12 kvm_main_loop () at /usr/src/debug/qemu-kvm-0.12.1.2/qemu-kvm.c:2138 #13 0x000000000040e10b in main_loop (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at /usr/src/debug/qemu-kvm-0.12.1.2/vl.c:4277 #14 main (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at /usr/src/debug/qemu-kvm-0.12.1.2/vl.c:6407 (gdb)