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Fixed

LIN8-8847 : [TIPC] Disabling bearer caused kernel panic

Created: Mar 14, 2018    Updated: Jul 10, 2019
Resolved Date: Apr 25, 2018
Found In Version: 8.0.0.17, 8.0.0.24
Fix Version: 8.0.0.26
Severity: Standard
Applicable for: Wind River Linux 8
Component/s: Networking

Description

Disabling bearer caused kernel panic
This problem does not happen 100% but quite frequently.

Expect: Should not get kernel panic by disabling bearer

Steps to Reproduce

Customer is testing this on actual targets.
But this can be reproduced on x86(KVM) as well.

1. Prepare 2 hosts 

  Host1(address 1.1.2) <----------> Host2(address 1.1.1)

2. Run the following on each hosts.
  Host1:
  # modprobe tipc
  # ifconfig eth1 up
  # tipc-config -a=1.1.2
  # tipc-config -be=eth:eth1

  Host2:
  # modprobe tipc
  # ifconfig eth1 up
  # tipc-config -a=1.1.1
  # while true; do tipc-config -be=eth:eth1; sleep 0.1; tipc-config -bd=eth:eth1; sleep 0.1; done

3. Kernel panic will happen (refer to panic.log)

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