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System crashed with kernel oops and error "unable to handle kernel NULL pointer dereference at 000000000000002c" in MPLS environment.

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Information

 
TitleSystem crashed with kernel oops and error "unable to handle kernel NULL pointer dereference at 000000000000002c" in MPLS environment.
Symptoms
After MPLS related configuration changes or if MPLS process restarted, in rare occasions system can crash with following logs in system dump:
----- Kernel log messages -----
[7270432.346388] BUG: unable to handle kernel NULL pointer dereference at 000000000000002c
[7270432.353706] IP: [] isL2ptTunneledMac+0x145c/0x22c0 [nettx]
Environment
  • EXOS 22.3
  • MPLS
Cause
Root cause is xos0073473
Resolution
Upgrade to one of the following releases:
  • 22.5.1.7-patch1-4 or newer
  • 22.7
Additional notes

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