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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Valdearg, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1347008

** Package changed: linux-lts-trusty (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1347008

Title:
  Call trace and “TCP: out of memory… consider tuning tcp_mem”

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  The install on a remote machine was upgraded to the trusty-lts kernel
  as stated in the HWE instructions. There is a bridge (br0) configured
  with the Ethernet interface (eth0) through the interfaces(5)
  configuration. After a couple of hours the machine would only respond
  to ICMP queries and connections with all services running on TCP ports
  could not be established. Therefore, a hard reboot was issued.
  Attached is the contents of /var/log/kern.log, post-reboot, with what
  seems to be relevant information (call trace, kernel message with
  “TCP: out of memory… consider tuning tcp_mem”, etc) around the
  relevant timespan. Inbound services running on TCP ports being
  inaccessible was first noticed around 02:30 (the machine's time). This
  matches up with the first “out of memory” message.

  The machine is running precise 12.04.4:

  valdearg@blair:~$ uname -a;dpkg -l linux-generic-lts-trusty linux-image-3.13.0-32-generic;grep 'LTS' /etc/lsb-release;lspci|grep Ether 
  Linux blair 3.13.0-32-generic #57~precise1-Ubuntu SMP Tue Jul 15 03:51:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name                                 Version                              Description
  +++-====================================-====================================-========================================================================================
  ii  linux-generic-lts-trusty             3.13.0.32.28                         Generic Linux kernel image and headers
  ii  linux-image-3.13.0-32-generic        3.13.0-32.57~precise1                Linux kernel image for version 3.13.0 on 64 bit x86 SMP
  DISTRIB_DESCRIPTION="Ubuntu 12.04.4 LTS"
  04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)

  
  This incident might be related to these bug reports:
  https://bugzilla.kernel.org/show_bug.cgi?id=77481
  https://lists.debian.org/debian-kernel/2014/04/msg00184.html

  Please let me know if there is anything else I can provide.

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