Guest

Preview Tool

Cisco Bug: CSCun62014 - Router crash with %SYS-3-BADFREEPTRS after reconfiguring pppoe

Last Modified

Jun 24, 2019

Products (84)

  • Cisco IOS
  • Cisco 1905 Serial Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco 881SRSTW Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco C892FSP Integrated Services Router
  • Cisco 812 CiFi Integrated Services Router
  • Cisco 886VAG 3G Integrated Services Router
  • Cisco 819 Hardened Integrated Services Router
  • Cisco C897VA Integrated Services Router
View all products in Bug Search Tool Login Required

Known Affected Releases

15.4(1)T1 15.4(2)T1 15.4(2.1)T

Description (partial)

Symptom:
Router crash due to memory corruption following errors in crash file:

*Mar  7 09:57:50.987: %SYS-3-BADFREEPTRS: Bad tail pointer 2A3795A0 at 29D154C0 (head = 29D154D4)

*Mar  7 09:57:50.991: %SYS-6-BLKINFO: Head does not correspond to tail in empty free list blk 31F0CDFC, words 18, alloc 2395BBA8, Free, dealloc 2395D49C, rfcnt 0

Conditions:
Need to have PPPoE
Crash happens after removing wrongly configured service-name under Ethernet interface.

CMD: 'int eth0/1/0.2900'  
CMD: 'no  pppoe-client dial-pool-number 14 service-name "xxxxxxx"'  
CMD: 'pppoe-client dial-pool-number 14 service-name "yyyyyy"'  

After changing the service name from xxxxxx to yyyyyy , dialer comes up. But after checkheaps run, it will crash the router.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.