Fw: [Bug 205439] New: SCTP responds to heartbeat from the wrong address / interface

[Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>]

Begin forwarded message:

Date: Tue, 05 Nov 2019 11:59:05 +0000
From: bugzilla-daemon@xxxxxxxxxxxxxxxxxxx
To: stephen@xxxxxxxxxxxxxxxxxx
Subject: [Bug 205439] New: SCTP responds to heartbeat from the wrong address / interface


https://bugzilla.kernel.org/show_bug.cgi?id=205439

            Bug ID: 205439
           Summary: SCTP responds to heartbeat from the wrong address /
                    interface
           Product: Networking
           Version: 2.5
    Kernel Version: 4.9.35-server
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Other
          Assignee: stephen@xxxxxxxxxxxxxxxxxx
          Reporter: paul@xxxxxx
        Regression: No

Seems that SCTP responds to heartbeat from the wrong address / interface.

# netstat -nS | fgrep 162.93.39.
sctp       0      0 81.226.10.66:3561     162.93.39.198:3561      ESTABLISHED
                    81.226.10.70          162.93.39.194
sctp       0      0 81.226.10.66:3560     162.93.39.134:3560      ESTABLISHED
                    81.226.10.70          162.93.39.130

Bad:
    3   0.055267 162.93.39.130 → 185.226.110.70 SCTP 74 HEARTBEAT
    4   0.055291 81.226.10.66 → 162.93.39.130 SCTP 74 HEARTBEAT_ACK
    7   0.355746 162.93.39.194 → 185.226.110.70 SCTP 74 HEARTBEAT
    8   0.355758 81.226.10.66 → 162.93.39.194 SCTP 74 HEARTBEAT_ACK

Good:
   13   0.551876 162.93.39.134 → 81.226.10.66 SCTP 74 HEARTBEAT
   14   0.551906 81.226.10.66 → 162.93.39.134 SCTP 74 HEARTBEAT_ACK
   19   0.853376 162.93.39.198 → 81.226.10.66 SCTP 74 HEARTBEAT
   20   0.853388 81.226.10.66 → 162.93.39.198 SCTP 74 HEARTBEAT_ACK


This is multi-homed scenario of SCTP.

Regards,

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