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Cisco Bug: CSCvu33909 - CAT9K Crash in FED Driver at Boot Due to "free(): corrupted unsorted chunks" Error in GLIBC

Last Modified

Jul 14, 2020

Products (1)

  • Cisco Catalyst 9200 Series Switches

Known Affected Releases

16.12.3

Description (partial)

Symptom:
A CAT 9K switch running IOS-XE 16.12.x code might see a very rare crash in the FED process during boot.

One sign of the crash will be that the FED process terminated with a return code of "134" which is a SIGABRT. Eg:

  System returned to ROM by Critical process fed fault on fp_0_0 (rc=134)

Note: Not all FED crashes involving SIGABRT are necessarily due to this bug. This issue is due to the FED process failing a memory check at boot. The error "free(): corrupted unsorted chunks" will be present in the process stack of the FED core file. Since examining the process stack requires that the core file be decoded, TAC may be needed to confirm this bug.

Conditions:
- CAT 9K is running IOS-XE 16.12.x code
- During boot, switch crashes in the FED process
- After switch recovers, the return to ROM reason is "Critical process fed fault on fp_0_0 (rc=134)"
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