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Cisco Bug: CSCup53513 - Invalid ptr in free list of ipv4_mfwd_partner partner.

Last Modified

Jul 21, 2018

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

Symptom:Continuous MFWD crash when mrib has been restarted 5 times. The crash was happening due to pointer corruption which was getting accessed during mfwd shared memory reset. mfwd has restart count of 5 after which mfwd resets the shared memory. During shared memory reset mfwd walks all the free pointer list to return it to system and one of the pointer in this was corrupt. Due to this mfwd kept crashing and never recovered. The fix was to not access the free pointer list after 5 restarts while doing shared memory reset since due to shared mem reset anyway the memory will be returned to the system.

Conditions:MRIB has to be restarted 5 times
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