This bug was fixed in the package systemd - 204-5ubuntu20.15
---------------
systemd (204-5ubuntu20.15) trusty; urgency=medium
* Avoid writing duplicate entries in 70-persistent-net.rules by double
checking if the new udev rule has already been written for the given
interface. This happens if multiple add events are generated before
the write_net_rules script returns and udevd renames the interface.
* write_net_rules: Escape '{' and '}' characters as well, to make this work
with busybox grep. (LP: #1470399)
-- Louis Bouchard <louis.bouch...@ubuntu.com> Mon, 05 Oct 2015
12:34:41 +0200
** Changed in: systemd (Ubuntu Trusty)
Status: Fix Committed => Fix Released
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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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