Red Hat Bugzilla – Bug 996011
vlan and queues options cause core dumped when qemu-kvm process quit(or ctrl+c)
Last modified: 2015-03-05 03:01:18 EST
Description of problem: With both vlan and queues option boot qemu-kvm process, it will cause core dump when qemu-kvm quit. so vlan and queues cann't be used together. Version-Release number of selected component (if applicable): 100% How reproducible: # uname -r 3.10.0-3.el7.x86_64 #qemu-kvm-1.5.2-1.el7.x86_64 Steps to Reproduce: 1./usr/libexec/qemu-kvm -monitor stdio -device virtio-net-pci,netdev=fuxc1,vlan=1 -netdev tap,id=fuxc1,vhost=on,script=/etc/qemu-ifup,queues=2 2.quit qemu-kvm process (qemu) q 3. Actual results: (qemu) q Detaching after fork from child process 24069. /etc/qemu-ifdown: could not launch network script Program received signal SIGSEGV, Segmentation fault. qemu_free_net_client (nc=0x0) at net/net.c:291 291 if (nc->send_queue) { Missing separate debuginfos, use: debuginfo-install alsa-lib-1.0.27.1-2.el7.x86_64 celt051-0.5.1.3-6.el7.x86_64 cyrus-sasl-lib-2.1.26-9.el7.x86_64 cyrus-sasl-md5-2.1.26-9.el7.x86_64 cyrus-sasl-plain-2.1.26-9.el7.x86_64 dbus-libs-1.6.12-4.el7.x86_64 flac-libs-1.3.0-2.el7.x86_64 glib2-2.36.3-2.el7.x86_64 glibc-2.17-13.el7.x86_64 gmp-5.1.1-2.el7.x86_64 gnutls-3.1.13-1.el7.x86_64 gsm-1.0.13-9.el7.x86_64 json-c-0.11-1.el7.x86_64 keyutils-libs-1.5.5-4.el7.x86_64 krb5-libs-1.11.3-4.el7.x86_64 libICE-1.0.8-5.el7.x86_64 libSM-1.2.1-5.el7.x86_64 libX11-1.6.0-1.el7.x86_64 libXau-1.0.8-1.el7.x86_64 libXext-1.3.2-1.el7.x86_64 libXi-1.7.2-1.el7.x86_64 libXtst-1.2.2-1.el7.x86_64 libaio-0.3.109-9.el7.x86_64 libasyncns-0.8-5.el7.x86_64 libattr-2.4.46-10.el7.x86_64 libcap-2.22-6.el7.x86_64 libcom_err-1.42.8-2.el7.x86_64 libdb-5.3.21-11.el7.x86_64 libgcc-4.8.1-5.el7.x86_64 libgcrypt-1.5.2-2.el7.x86_64 libgpg-error-1.11-1.el7.x86_64 libiscsi-1.7.0-5.el7.x86_64 libjpeg-turbo-1.2.90-2.el7.x86_64 libogg-1.3.0-5.el7.x86_64 libpng-1.5.13-2.el7.x86_64 libseccomp-2.1.0-0.el7.x86_64 libselinux-2.1.13-16.el7.x86_64 libsndfile-1.0.25-7.el7.x86_64 libtasn1-3.3-1.el7.x86_64 libusbx-1.0.15-2.el7.x86_64 libuuid-2.23.1-3.el7.x86_64 libvorbis-1.3.3-4.el7.x86_64 libxcb-1.9-3.el7.x86_64 nettle-2.6-2.el7.x86_64 nspr-4.10-2.el7.x86_64 nss-3.15-6.el7.x86_64 nss-softokn-freebl-3.15-4.el7.x86_64 nss-util-3.15-2.el7.x86_64 openssl-libs-1.0.1e-14.el7.x86_64 p11-kit-0.18.5-1.el7.x86_64 pcre-8.32-7.el7.x86_64 pixman-0.30.0-1.el7.x86_64 pulseaudio-libs-3.0-10.el7.x86_64 tcp_wrappers-libs-7.6-74.el7.x86_64 usbredir-0.6-3.el7.x86_64 zlib-1.2.7-10.el7.x86_64 (gdb) bt #0 qemu_free_net_client (nc=0x0) at net/net.c:291 #1 0x00005555556c5a00 in qemu_del_nic (nic=0x55555656b370) at net/net.c:355 #2 0x00005555556c7059 in net_cleanup () at net/net.c:1036 #3 0x00007ffff3929279 in __run_exit_handlers () from /lib64/libc.so.6 #4 0x00007ffff39292c5 in exit () from /lib64/libc.so.6 #5 0x00007ffff3911b4c in __libc_start_main () from /lib64/libc.so.6 #6 0x00005555555c4a6d in _start () (gdb) Expected results: Additional info: If vlan option is unavailable, please remote it from qemu-kvm.
Low priority, we don't use vlan for qdev.
Not a blocker, since it can only happen when running QEMU manually. (netdev and vlan together). Vlad already fixed it upstream, so we shall get it as part of the 7.1 rebase.
Fix included in qemu-kvm-1.5.3-70.el7
Reproduced this bug with qemu-kvm-1.5.3-69.el7.x86_64 Steps: 1.Boot guest with vlan and queues /usr/libexec/qemu-kvm -monitor stdio -device virtio-net-pci,netdev=fuxc1,vlan=1 -netdev tap,id=fuxc1,vhost=on,script=/etc/qemu-ifup,queues=2 2.quit it (qemu) q Detaching after fork from child process 6502. /etc/qemu-ifdown: could not launch network script Program received signal SIGSEGV, Segmentation fault. qemu_free_net_client (nc=0x0) at net/net.c:291 291 if (nc->send_queue) { (gdb) bt #0 qemu_free_net_client (nc=0x0) at net/net.c:291 #1 0x00005555556e6010 in qemu_del_nic (nic=0x5555565ac030) at net/net.c:355 #2 0x00005555556e7429 in net_cleanup () at net/net.c:1092 #3 0x00007ffff2c95e79 in __run_exit_handlers () from /lib64/libc.so.6 #4 0x00007ffff2c95ec5 in exit () from /lib64/libc.so.6 #5 0x00007ffff2c7eafc in __libc_start_main () from /lib64/libc.so.6 #6 0x0000555555605fed in _start () (gdb) So this bug is reproduced.
Verify this bug with qemu-kvm-1.5.3-75.el7.x86_64 Try to launch qemu-kvm # /usr/libexec/qemu-kvm -monitor stdio -device virtio-net-pci,netdev=fuxc1,vlan=2 -netdev tap,id=fuxc1,vhost=on,script=/etc/qemu-ifup,queues=2 Result: Can not boot when vlan and netdev together. QEMU 1.5.3 monitor - type 'help' for more information (qemu) qemu-kvm: -device virtio-net-pci,netdev=fuxc1,vlan=2: Property 'virtio-net-pci.vlan' doesn't take value 'legacy-vlan' /etc/qemu-ifdown: could not launch network script So this bug is fixed by qemu-kvm-1.5.3-75.el7.x86_64 Verify this this bug with qemu-kvm-rhev-2.1.2-3.el7.x86_64 Try to launch qemu-kvm # /usr/libexec/qemu-kvm -monitor stdio -device virtio-net-pci,netdev=fuxc1,vlan=2 -netdev tap,id=fuxc1,vhost=on,script=/etc/qemu-ifup,queues=2 Result: Can not boot when vlan and netdev together. QEMU 2.1.2 monitor - type 'help' for more information (qemu) qemu-kvm: -device virtio-net-pci,netdev=fuxc1,vlan=2: Property 'virtio-net-pci.vlan' doesn't take value 'vlan' /etc/qemu-ifdown: could not launch network script So this bug is fixed by qemu-kvm-rhev-2.1.2-3.el7.x86_64 So according to above, this bug is verified
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2015-0349.html