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[Bug 1470399] Update Released

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Chris J Arges <1470399@xxxxxxxxxxxxxxxxxx>
Date: Wed, 14 Oct 2015 13:45:42 -0000
Reply-to: Bug 1470399 <1470399@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
The verification of the Stable Release Update for systemd has completed
successfully and the package has now been released to -updates.
Subsequently, the Ubuntu Stable Release Updates Team is being
unsubscribed and will not receive messages about this bug report.  In
the event that you encounter a regression using the package from
-updates please report a new bug using ubuntu-bug and tag the bug report
regression-update so we can easily find any regressions.

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https://bugs.launchpad.net/bugs/1470399

Title:
  udev duplicates entries in 70-persistent-net.rules

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Trusty:
  Fix Released
Status in systemd package in Debian:
  Fix Released

Bug description:
  [SRU justification]
  Without this fix, duplicate entries may render the system unbootable

  [Impact]
  Under certain race condition, the file /etc/udev/rules.d/70-persistent-net.rules may contain duplicate entries.

  [Fix]
  Verify the content of the file prior to re-writing the rule.

  [Test Case]
  $ rm /etc/udev/rules.d/70-persistent-net.rules
  $ typeset -i I=0 && while (( I <= 20));do echo add > /sys/class/net/eth0/uevent ;((I+=1));done

  Without the patch, there will be 20 identical entries in the file.

  [Regression]
  None expected, the modification is already in Vivid, Wily and Debian

  [Original description of the problem]
  After a fresh installation of 14.04, I had various troubles with the ethernet NIC.  Long story short, there were duplicate entries in /etc/udev/rules.d/70-persistent-net.rules .
  The 70-persistent-net.rules file has 5 entries for a 4 port NIC (Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe).

  -----

      # PCI device 0x14e4:0x165f (tg3)
      SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="54:9f:35:09:8f:69", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

      # PCI device 0x14e4:0x165f (tg3)
      SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="54:9f:35:09:8f:6b", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3"

      # PCI device 0x14e4:0x165f (tg3)
      SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="54:9f:35:09:8f:68", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

      # PCI device 0x14e4:0x165f (tg3)
      SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="54:9f:35:09:8f:6a", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"

      # this last declaration was generated by udev but overrides prior command with same ATTR{address} value.
      # PCI device 0x14e4:0x165f (tg3)
      SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="54:9f:35:09:8f:68", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth4"

  -----

  lspci shows only 4 PCI devices.

  -----
  $ lspci -vn | grep -A 16 -F '14e4:165f'

      01:00.0 0200: 14e4:165f
       Subsystem: 1028:1f5b
       Flags: bus master, fast devsel, latency 0, IRQ 41
       Memory at 91b30000 (64-bit, prefetchable) [size=64K]
       Memory at 91b40000 (64-bit, prefetchable) [size=64K]
       Memory at 91b50000 (64-bit, prefetchable) [size=64K]
       Expansion ROM at 91b80000 [disabled] [size=256K]
       Capabilities: [48] Power Management version 3
       Capabilities: [50] Vital Product Data
       Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
       Capabilities: [a0] MSI-X: Enable+ Count=17 Masked-
       Capabilities: [ac] Express Endpoint, MSI 00
       Capabilities: [100] Advanced Error Reporting
       Capabilities: [13c] Device Serial Number 00-00-54-9f-35-09-8f-68
       Capabilities: [150] Power Budgeting <?>
       Capabilities: [160] Virtual Channel
       Kernel driver in use: tg3
      --
      01:00.1 0200: 14e4:165f
       Subsystem: 1028:1f5b
       Flags: bus master, fast devsel, latency 0, IRQ 45
       Memory at 91b00000 (64-bit, prefetchable) [size=64K]
       Memory at 91b10000 (64-bit, prefetchable) [size=64K]
       Memory at 91b20000 (64-bit, prefetchable) [size=64K]
       Expansion ROM at 91bc0000 [disabled] [size=256K]
       Capabilities: [48] Power Management version 3
       Capabilities: [50] Vital Product Data
       Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
       Capabilities: [a0] MSI-X: Enable- Count=17 Masked-
       Capabilities: [ac] Express Endpoint, MSI 00
       Capabilities: [100] Advanced Error Reporting
       Capabilities: [13c] Device Serial Number 00-00-54-9f-35-09-8f-69
       Capabilities: [150] Power Budgeting <?>
       Capabilities: [160] Virtual Channel
       Kernel driver in use: tg3
      --
      02:00.0 0200: 14e4:165f
       Subsystem: 1028:1f5b
       Flags: bus master, fast devsel, latency 0, IRQ 40
       Memory at 91a30000 (64-bit, prefetchable) [size=64K]
       Memory at 91a40000 (64-bit, prefetchable) [size=64K]
       Memory at 91a50000 (64-bit, prefetchable) [size=64K]
       Expansion ROM at 91a80000 [disabled] [size=256K]
       Capabilities: [48] Power Management version 3
       Capabilities: [50] Vital Product Data
       Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
       Capabilities: [a0] MSI-X: Enable- Count=17 Masked-
       Capabilities: [ac] Express Endpoint, MSI 00
       Capabilities: [100] Advanced Error Reporting
       Capabilities: [13c] Device Serial Number 00-00-54-9f-35-09-8f-6a
       Capabilities: [150] Power Budgeting <?>
       Capabilities: [160] Virtual Channel
       Kernel driver in use: tg3
      --
      02:00.1 0200: 14e4:165f
       Subsystem: 1028:1f5b
       Flags: bus master, fast devsel, latency 0, IRQ 44
       Memory at 91a00000 (64-bit, prefetchable) [size=64K]
       Memory at 91a10000 (64-bit, prefetchable) [size=64K]
       Memory at 91a20000 (64-bit, prefetchable) [size=64K]
       Expansion ROM at 91ac0000 [disabled] [size=256K]
       Capabilities: [48] Power Management version 3
       Capabilities: [50] Vital Product Data
       Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
       Capabilities: [a0] MSI-X: Enable- Count=17 Masked-
       Capabilities: [ac] Express Endpoint, MSI 00
       Capabilities: [100] Advanced Error Reporting
       Capabilities: [13c] Device Serial Number 00-00-54-9f-35-09-8f-6b
       Capabilities: [150] Power Budgeting <?>
       Capabilities: [160] Virtual Channel
       Kernel driver in use: tg3

  -----

  Description:	Ubuntu 14.04.2 LTS
  Release:	14.04

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