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Cisco Bug: CSCus45070 - particle pool corruption crash

Last Modified

Jan 29, 2017

Products (69)

  • Cisco IOS
  • Cisco 861W Integrated Services Router
  • Cisco 881SRSTW Integrated Services Router
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 1905 Serial Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco 7301 Router
  • Cisco 888E-CUBE Integrated Services Router
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Known Affected Releases


Description (partial)

The device may crash preceding the following errors:

%SYS-2-CHUNKBADFREEMAGIC: Bad free magic number in chunk header, chunk B7362D0 data 78884F40 chunk_freemagic 7299F5E8 -Process= "Check heaps", ipl= 0, pid= 6

This problem is caused by overruns on the normal pool as a result of buffer failures in the particle pool. This problem has been observed on interface gig0/3 of a 7201 having a default particle size of 768 bytes. The "failure" in the particle size are accounted as "fallback" in the Normal pool which is set at 512 bytes. This is a corner case scenario. Not many customers may hit such issues.

GigabitEthernet0/3 buffers, 768 bytes (total 4128, permanent 1000):
     2885 in free list (128 min, 3000 max allowed)
     220773 hits, 7084 fallbacks, 4910 trims, 8038 created
     162 failures (0 no memory)
     1000 max cache size, 484 in cache
     44026767 hits in cache, 219978 misses in cache
     14 buffer threshold, 27970 threshold transitions
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