Created attachment 357636 [details] failed log from serial console Description of problem boot a vm when iptables of the host open,then try to close the firewall,the host panic.if close the firewall when no vm running,it's OK. Version-Release number of selected component (if applicable) host(RHEL5U4)--kernel:2.6.18-162.el5 kvm version:kvm-83-106.el5 guest:RHEL5.3-Server-32 CLI::/usr/libexec/qemu-kvm -no-hpet -usbdevice tablet -rtc-td-hack -smp 2 -m 2G -uuid `uuidgen` -net nic,model=virtio,macaddr=22:44:66:88:00:17,vlan=0 -net tap,vlan=0,script=/etc/qemu-ifup -cpu qemu64,+sse2 -drive file=/media/RHEL-Server-5.3-32.raw,if=ide -boot c -vnc :3 How reproducible: 50% when nic=rtl8139,I try three times,it's OK when nic=e1000,almost when the second time,the issue happend when nic=virtio,almost when the second time,the issue happend Steps to Reproduce: 1.run #service iptables status to check the firewall's status,ensure the firewall is open 2.boot a vm 3.run #service iptables stop try to close the firewall Actual results: sometimes the host system panic,can not do any operation Expected results: after 3:the firewall is closed,no abnormal happend Additional info: network config files: [root@dhcp-66-70-28 network-scripts]# cat ifcfg-breth0 DEVICE=breth0 TYPE=Bridge PEERNTP=yes DELAY=0 BOOTPROTO=dhcp ONBOOT=yes [root@dhcp-66-70-28 network-scripts]# cat ifcfg-eth0 DEVICE=eth0 ONBOOT=yes BRIDGE=breth0 HWADDR=00:23:AE:8D:8B:87 [root@dhcp-66-70-28 network-scripts]# cat /etc/qemu-ifup #!/bin/sh switch=breth0 /sbin/ifconfig $1 0.0.0.0 up /usr/sbin/brctl addif ${switch} $1
Was the net.bridge.bridge-nf-call disabled?
Is this reproducible on RHEV-H ? On RHEV-H we set /etc/sysctl.conf/net.bridge.bridge-nf-call-* to 0 and /etc/sysconfig/iptables-config/IPTABLES_MODULES_UNLOAD no