[Qemu-devel] [Bug 1656927] [NEW] Network (TCP) access regression

[Joan Moreau]

Public bug reported:

Starting a VM with

/usr/bin/qemu-system-x86_64 -machine pc-i440fx-1.7,accel=kvm -usb -usbdevice 
tablet -usbdevice keyboard -enable-kvm -cpu core2duo -smp 2 -drive file=winp
ro.qcow,index=0,media=disk,format=qcow2 -m 4096 -vga vmware -vnc :3 -k en-us 
-device rtl8139,netdev=nic1 -netdev user,id=nic1,smb=/data/vps/files/,hostfw
d=tcp::10053-:10053,hostfwd=tcp::3387-:3389 -rtc base=utc,clock=host -daemonize

in 2.5.1, all works fine

in any version after 2.5.1.1, the network terminate TCP connections
after a certain period .

To reproduce, starts an app that use always connected TCP sockets (I am
using Metatrader 4), let it run a an hour, the app does not realize the
TCP is out of order but the TCP connection is closed by QEMU

in 2.5.1.x, Metatrader works perfectly

Thank you for your help

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1656927

Title:
  Network (TCP) access regression

Status in QEMU:
  New

Bug description:
  Starting a VM with

  /usr/bin/qemu-system-x86_64 -machine pc-i440fx-1.7,accel=kvm -usb -usbdevice 
tablet -usbdevice keyboard -enable-kvm -cpu core2duo -smp 2 -drive file=winp
  ro.qcow,index=0,media=disk,format=qcow2 -m 4096 -vga vmware -vnc :3 -k en-us 
-device rtl8139,netdev=nic1 -netdev user,id=nic1,smb=/data/vps/files/,hostfw
  d=tcp::10053-:10053,hostfwd=tcp::3387-:3389 -rtc base=utc,clock=host 
-daemonize

  in 2.5.1, all works fine

  in any version after 2.5.1.1, the network terminate TCP connections
  after a certain period .

  To reproduce, starts an app that use always connected TCP sockets (I
  am using Metatrader 4), let it run a an hour, the app does not realize
  the TCP is out of order but the TCP connection is closed by QEMU

  in 2.5.1.x, Metatrader works perfectly

  Thank you for your help

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