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

Views: 22

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

Relevant Products

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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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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

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BugZero Risk Score
6.1 Medium