On Fri, Nov 21, 2014 at 11:26:23AM -0800, Pawan Uberoy wrote: > Hello, > > We are running a couple of VMs using the qemu command on ubuntu 14.04. It > seems like there is a corruption on the socket. It crashes on its on after a > day or so of light activity. > > Is this a known issue? > > Please let me know if this is the right place to post this or if you can > help.
CCing Jan Kiszka, maintainer of the slirp network stack. For production deployments it is common to use the tap netdev instead of slirp. tun/tap networking is more robust and uses the host kernel network stack for bridging, NAT, etc. Stefan > thanks > pawan > > Command: > qemu-system-x86_64 --version > QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.7), Copyright (c) > 2003-2008 Fabrice Bellard > > qemu-system-x86_64 -enable-kvm -smp 8 -hda > /var/venom/instance_repo/3db8f1b6-74a3-11e3-96bf-38eaa7a2f70a.qcow2 -m 4096 > -net nic,model=e1000,vlan=3 -net user,hostfwd=tcp::7002-:22,vlan=3 -net > nic,macaddr=DE:AD:00:18:00:00,model=e1000,vlan=4 -net > tap,ifname=td_274-3_2,script=no,downscript=no,vlan=4 -net > nic,macaddr=DE:AD:00:18:00:01,model=e1000,vlan=5 -net > tap,ifname=td_br1-ctrl_2,script=no,downscript=no,vlan=5 -net > nic,macaddr=DE:AD:00:18:00:02,model=e1000,vlan=6 -net > tap,ifname=td_br2-data_2,script=no,downscript=no,vlan=6 -vnc :17 -qmp > tcp:localhost:12002,server,nowait -chardev > socket,id=charmonitor,path=/tmp/mon.12002,server,nowait -mon > chardev=charmonitor,id=monitor > > Backtrace: > Core was generated by `qemu-system-x86_64 -enable-kvm -hda > /var/venom/instance_repo/390fa8c6-74a3-11e3'. > Program terminated with signal SIGSEGV, Segmentation fault. > #0 tcp_output (tp=tp@entry=0x7f09bc08af50) at > /build/buildd/qemu-2.0.0+dfsg/slirp/tcp_output.c:127 > 127 len = min(so->so_snd.sb_cc, win) - off; > (gdb) bt > #0 tcp_output (tp=tp@entry=0x7f09bc08af50) at > /build/buildd/qemu-2.0.0+dfsg/slirp/tcp_output.c:127 > #1 0x00007f09dbd364aa in tcp_drop (tp=tp@entry=0x7f09bc08af50, > err=err@entry=0) at /build/buildd/qemu-2.0.0+dfsg/slirp/tcp_subr.c:232 > #2 0x00007f09dbd377f2 in tcp_timers (timer=2, tp=0x7f09bc08af50) at > /build/buildd/qemu-2.0.0+dfsg/slirp/tcp_timer.c:287 > #3 tcp_slowtimo (slirp=slirp@entry=0x7f09de77bc60) at > /build/buildd/qemu-2.0.0+dfsg/slirp/tcp_timer.c:88 > #4 0x00007f09dbd32358 in slirp_pollfds_poll (pollfds=0x7f09de775c00, > select_error=select_error@entry=0) > at /build/buildd/qemu-2.0.0+dfsg/slirp/slirp.c:488 > #5 0x00007f09dbce29d7 in main_loop_wait (nonblocking=<optimized out>) at > /build/buildd/qemu-2.0.0+dfsg/main-loop.c:487 > #6 0x00007f09dbb8b1f6 in main_loop () at > /build/buildd/qemu-2.0.0+dfsg/vl.c:2051 > #7 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) > at /build/buildd/qemu-2.0.0+dfsg/vl.c:4510 > (gdb) p tp->t_socket > $1 = (struct socket *) 0x7f08bc0cd050 > (gdb) p *tp->t_socket > Cannot access memory at address 0x7f08bc0cd050 > (gdb) > >
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