Verified this bug against latest qemu-kvm upstream. kvm + qemu-kvm: ae7a2a3f + a212f79f..
The following commit fixed it. commit a212f79fc4596570124fb864425b980c157cd001 Author: Jason Wang <jasow...@redhat.com> Date: Thu May 17 13:25:43 2012 +0800 rtl8139: validate rx ring before receiving packets Commit ff71f2e8cacefae99179993204172bc65e4303df prevent the possible crash during initialization of linux driver by checking the operating mode.This seems too strict as: - the real card could still work in mode other than normal - some buggy driver who does not set correct opmode after eeprom access So, considering rx ring address were reset to zero (which could be safely trated as an address not intened to DMA to), in order to both letting old guest work and preventing the unexpected DMA to guest, we can forbid packet receiving when rx ring address is zero. ** Changed in: qemu Status: New => Fix Released -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1013467 Title: network in bridge mode doesn't work in SMP Linux guest Status in QEMU: Fix Released Bug description: Environment: ------------ Host OS (ia32/ia32e/IA64):ia32e Guest OS (ia32/ia32e/IA64):ia32e Guest OS Type (Linux/Windows):Linux kvm.git Commit:25e531a988ea5a64bd97a72dc9d3c65ad5850120 qemu-kvm Commit:0a948cbb1835e5f36990e173966d30bc4c8cc038 Host Kernel Version:3.5.0-rc1 Hardware:WSM-EP, Romley-EP Bug detailed description: -------------------------- Network in bridge mode doesn't work in SMP RHEL6.1/6.2 guest. After booting up, use “dhclient ethX” to get IP (we use DHCP in the network), guest can not get IP. Note: 1. UP guest(-smp 1) doesn’t have this issue. 2. Windows(e.g. Win7) guest(-smp 4) has no issue. This should be a qemu-kvm bug. kvm + qemu-kvm = result 25e531a9 + 0a948cbb = bad 25e531a9 + 18b01275 = good Reproduce steps: ---------------- 1.start up a host with kvm(25e531a9) + qemu-kvm (0a948cbb) 2.qemu-system-x86_64 -m 1024 -smp 4 –net nic,model=rt18139 –net tap,script=/etc/kvm/qemu-ifup –hda /root/rhel6u1.qcow 3. ifconfig 4. ping 192.168.199.98 (a IP in the same subnet) 5. dhclient ethx (can't get dynamic IP address) Current result: ---------------- The guest can not get IP Expected result: ---------------- The guest get IP and work fine. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1013467/+subscriptions