BugZero | Cisco BugID CSCva81415 - fib_mgr crash on 5.3.3 due to stack over 4000 fram...

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BugZero | Cisco BugID CSCva81415 - fib_mgr crash on 5.3.3 due to stack over 4000 fram...

Cisco - Defect ID: CSCva81415

fib_mgr crash on 5.3.3 due to stack over 4000 frames

Cisco - Defect ID: CSCva81415

fib_mgr crash on 5.3.3 due to stack over 4000 frames

Last updated on January 8th, 2025

BugZero Risk Score
6.1 Medium

Overall: 6.1

Severity: 6.4

Lifecycle: 9.1

Popularity: 4.6

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Bug Details

Description

Symptom

RP/0/RSP0/CPU0:Jun 29 14:52:59.968 IST: dumper[60]: %OS-DUMPER-4-SIGSEGV : Thread 3 received SIGSEGV - Segmentation Fault RP/0/RSP0/CPU0:Jun 29 14:52:59.968 IST: dumper[60]: %OS-DUMPER-4-SIGSEGV_INFO : Accessed BadAddr 0x409dff0 at PC 0xbb0c76a. Signal code 1 - SEGV_MAPPER. Address not mapped. RP/0/RSP0/CPU0:Jun 29 14:52:59.968 IST: dumper[60]: %OS-DUMPER-4-CRASH_INFO : Crashed pid = 237740 (pkg/bin/fib_mgr) RP/0/RSP0/CPU0:Jun 29 14:52:59.973 IST: dumper[60]: %OS-DUMPER-6-FALLBACK_CHOICE : Fall back choice: 0(harddisk:/dumper) in use RP/0/RSP0/CPU0:Jun 29 14:52:59.974 IST: dumper[60]: %OS-DUMPER-6-REGISTERS_INFO : EDI ESI EBP(fp) EXX RP/0/RSP0/CPU0:Jun 29 14:52:59.974 IST: dumper[60]: %OS-DUMPER-6-REGISTERS_INFO : R0 00000190 00000002 0409e000 fd2d9660 RP/0/RSP0/CPU0:Jun 29 14:52:59.974 IST: dumper[60]: %OS-DUMPER-6-REGISTERS_INFO : EBX EDX ECX EAX RP/0/RSP0/CPU0:Jun 29 14:52:59.974 IST: dumper[60]: %OS-DUMPER-6-REGISTERS_INFO : R4 04155b70 0c046218 0bb0c764 7149e468 RP/0/RSP0/CPU0:Jun 29 14:52:59.974 IST: dumper[60]: %OS-DUMPER-6-REGISTERS_INFO : EIP(pc) CS EFL ESP RP/0/RSP0/CPU0:Jun 29 14:52:59.974 IST: dumper[60]: %OS-DUMPER-6-REGISTERS_INFO : R8 0bb0c76a 000000f3 00001206 0409dff0 RP/0/RSP0/CPU0:Jun 29 14:52:59.974 IST: dumper[60]: %OS-DUMPER-6-REGISTERS_INFO : SS RP/0/RSP0/CPU0:Jun 29 14:52:59.974 IST: dumper[60]: %OS-DUMPER-6-REGISTERS_INFO : R12 000000fb RP/0/RSP0/CPU0:Jun 29 14:52:59.974 IST: dumper[60]: %OS-DUMPER-6-TRACE_BACK : #0 0xbb0c76a

Conditions

This happens when fib_mgr asserts due to some issue. There is a slight possibility that the assert might call another assert resulting in a recursive loop. ASSERT causes tracebacks on the consoles. Exact trigger is not known.

Workaround

n/a

Further Problem Description

The fix is low risk and removes the possibility of assert calling another assert. FIB-MGR crash is usually traffic impacting. Affects 5.3.3 and below on all platforms.

Change history

2025-01-08 Added: 5.3.3, 5.3.4, 6.1.1, 6.1.2, 6.1.21, 6.1.22, 6.1.3, 6.1.31, 6.1.32, 6.1.33, 6.1.4, 6.1.42, 6.1.45, 6.2.1, 6.2.2, 6.2.25, 6.2.3, 6.3.1, 6.3.15, 6.3.2, 6.3.3, 6.4.0, 6.4.1, 6.4.2, 6.5.1, 6.5.15, 6.5.2, 6.5.25, 6.5.3, 6.5.90, 6.5.92, 6.5.93, 6.6.1, 6.6.11, 6.6.2, 7.0.0, 7.2.1

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

Fixed versions: 5.3.3, 5.3.4, 6.1.1, 6.1.2, 6.1.21, 6.1.22, 6.1.3, 6.1.31, 6.1.32, 6.1.33, 6.1.4, 6.1.42, 6.1.45, 6.2.1, 6.2.2, 6.2.25, 6.2.3, 6.3.1, 6.3.15, 6.3.2, 6.3.3, 6.4.0, 6.4.1, 6.4.2, 6.5.1, 6.5.15, 6.5.2, 6.5.25, 6.5.3, 6.5.90, 6.5.92, 6.5.93, 6.6.1, 6.6.11, 6.6.2, 7.0.0, 7.2.1

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

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OPERATIONAL DEFECT DATABASE

Cisco - Defect ID: CSCva81415

fib_mgr crash on 5.3.3 due to stack over 4000 frames

Cisco - Defect ID: CSCva81415

fib_mgr crash on 5.3.3 due to stack over 4000 frames

Last updated on January 8th, 2025

BugZero Risk Score6.1 Medium

Bug Details

Symptom

Conditions

Workaround

Further Problem Description

Links

Top Cisco Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.1 Medium