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Cisco Bug: CSCuj42585 - GEC:QoS: cpp_cp_svr crash @pp_qm_event_get_parent_event when mem join

Last Modified

Feb 02, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.2(4)S 15.3(3)S 15.4(1)S 15.4(2)S

Description (partial)

When a flat policy is applied to a MLPPP, MFR or GEC aggregation bundle, the current leaf schedule object is replaced with a new one. The code was not updating the cached object which resulted in accessing invalid memory when the bundle bandwidth is updated. The bandwidth is updated when a member link is added to or removed from the bundle. 

Configuration example:

policy-map foo
  class prec1
    bandwidth percent 10

interface Port-channel1 aggregate
 ip address
 no negotiation auto
 lacp min-bundle 2
 service-policy output foo

When a bundle schedule is replaced, the cached object was not being updated leading to interface bandwidth update event to access invalid memory.

The problem is not easy to recreate as would require the QOS event for processing the flat policy to be interleaved with an interface bandwidth update event.
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