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[Bug 1405232] [NEW] ping reports wrong IP responding under certain conditions

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Public bug reported:

Description:	Ubuntu 14.04.1 LTS
Release:	14.04
iputils-ping:
Installed: 3:20121221-4ubuntu1.1
Candidate: 3:20121221-4ubuntu1.1

ping will report the incorrect reply IP address under certain, specific
conditions, and is repeatable. This is how to re-create the issue:

1. Start pinging an IP where you get an ICMP error message from some
other device (RFC792 lists errors). For instance: Destination IP is
offline and the last-hop router reports message type "Destination
Unreachable". I assume this would work for any ICMP error, though.

2. When the device comes back online, ping reports replies from the
"other" device, when it should report replies from the device that is
sending the "Echo Reply" messages.

3. If the ping is stopped and restarted after the device is up, it
reports the correct IP address again. Other ping utilities do not
exhibit this behavior.

Example output (Destination that was pinged was 172.21.56.50, last hop router was 172.21.25.103):
circle@circle:~$ /bin/ping 172.21.56.50
PING 172.21.56.50 (172.21.56.50) 56(84) bytes of data.
>From 172.21.25.103 icmp_seq=1 Destination Host Unreachable
>From 172.21.25.103 icmp_seq=2 Destination Host Unreachable
>From 172.21.25.103 icmp_seq=3 Destination Host Unreachable
>From 172.21.25.103 icmp_seq=4 Destination Host Unreachable
>From 172.21.25.103 icmp_seq=5 Destination Host Unreachable
>From 172.21.25.103 icmp_seq=6 Destination Host Unreachable
64 bytes from 172.21.25.103: icmp_seq=7 ttl=63 time=0.689 ms
64 bytes from 172.21.25.103: icmp_seq=8 ttl=63 time=0.635 ms
64 bytes from 172.21.25.103: icmp_seq=9 ttl=63 time=0.656 ms
64 bytes from 172.21.25.103: icmp_seq=10 ttl=63 time=0.822 ms
64 bytes from 172.21.25.103: icmp_seq=11 ttl=63 time=0.785 ms
^C
--- 172.21.56.50 ping statistics ---
11 packets transmitted, 5 received, +6 errors, 54% packet loss, time 10023ms
rtt min/avg/max/mdev = 0.635/0.717/0.822/0.077 ms, pipe 3
circle@circle:~$ /bin/ping 172.21.56.50
PING 172.21.56.50 (172.21.56.50) 56(84) bytes of data.
64 bytes from 172.21.56.50: icmp_seq=1 ttl=63 time=0.737 ms
64 bytes from 172.21.56.50: icmp_seq=2 ttl=63 time=0.646 ms
64 bytes from 172.21.56.50: icmp_seq=3 ttl=63 time=0.626 ms
^C
--- 172.21.56.50 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 0.626/0.669/0.737/0.056 ms

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: iputils-ping 3:20121221-4ubuntu1.1
ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
Uname: Linux 3.13.0-43-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue Dec 23 10:50:35 2014
InstallationDate: Installed on 2014-10-08 (76 days ago)
InstallationMedia: Xubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140723)
SourcePackage: iputils
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: iputils (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1405232

Title:
  ping reports wrong IP responding under certain conditions

Status in iputils package in Ubuntu:
  New

Bug description:
  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04
  iputils-ping:
  Installed: 3:20121221-4ubuntu1.1
  Candidate: 3:20121221-4ubuntu1.1

  ping will report the incorrect reply IP address under certain,
  specific conditions, and is repeatable. This is how to re-create the
  issue:

  1. Start pinging an IP where you get an ICMP error message from some
  other device (RFC792 lists errors). For instance: Destination IP is
  offline and the last-hop router reports message type "Destination
  Unreachable". I assume this would work for any ICMP error, though.

  2. When the device comes back online, ping reports replies from the
  "other" device, when it should report replies from the device that is
  sending the "Echo Reply" messages.

  3. If the ping is stopped and restarted after the device is up, it
  reports the correct IP address again. Other ping utilities do not
  exhibit this behavior.

  Example output (Destination that was pinged was 172.21.56.50, last hop router was 172.21.25.103):
  circle@circle:~$ /bin/ping 172.21.56.50
  PING 172.21.56.50 (172.21.56.50) 56(84) bytes of data.
  From 172.21.25.103 icmp_seq=1 Destination Host Unreachable
  From 172.21.25.103 icmp_seq=2 Destination Host Unreachable
  From 172.21.25.103 icmp_seq=3 Destination Host Unreachable
  From 172.21.25.103 icmp_seq=4 Destination Host Unreachable
  From 172.21.25.103 icmp_seq=5 Destination Host Unreachable
  From 172.21.25.103 icmp_seq=6 Destination Host Unreachable
  64 bytes from 172.21.25.103: icmp_seq=7 ttl=63 time=0.689 ms
  64 bytes from 172.21.25.103: icmp_seq=8 ttl=63 time=0.635 ms
  64 bytes from 172.21.25.103: icmp_seq=9 ttl=63 time=0.656 ms
  64 bytes from 172.21.25.103: icmp_seq=10 ttl=63 time=0.822 ms
  64 bytes from 172.21.25.103: icmp_seq=11 ttl=63 time=0.785 ms
  ^C
  --- 172.21.56.50 ping statistics ---
  11 packets transmitted, 5 received, +6 errors, 54% packet loss, time 10023ms
  rtt min/avg/max/mdev = 0.635/0.717/0.822/0.077 ms, pipe 3
  circle@circle:~$ /bin/ping 172.21.56.50
  PING 172.21.56.50 (172.21.56.50) 56(84) bytes of data.
  64 bytes from 172.21.56.50: icmp_seq=1 ttl=63 time=0.737 ms
  64 bytes from 172.21.56.50: icmp_seq=2 ttl=63 time=0.646 ms
  64 bytes from 172.21.56.50: icmp_seq=3 ttl=63 time=0.626 ms
  ^C
  --- 172.21.56.50 ping statistics ---
  3 packets transmitted, 3 received, 0% packet loss, time 1998ms
  rtt min/avg/max/mdev = 0.626/0.669/0.737/0.056 ms

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: iputils-ping 3:20121221-4ubuntu1.1
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Tue Dec 23 10:50:35 2014
  InstallationDate: Installed on 2014-10-08 (76 days ago)
  InstallationMedia: Xubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140723)
  SourcePackage: iputils
  UpgradeStatus: No upgrade log present (probably fresh install)

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