Troubleshooting Tip: How to troubleshoot SNMP daemon crashes after upgrading to 7.6.4

[seyuboglu]

Description	This article describes how to troubleshoot the SNMP daemon crashing continiously after upgrading to version 7.6.4.
Scope	FortiOS version 7.6.4.
Solution	This issue is reported after upgrading FortiGate from version 7.4.x to 7.6.4: After the upgrading FortGate from version 7.4.x to 7.6.4, there are many SNMP daemon crashes found in the crashlog output.  Run the command below and collect the crashlog on the device. diagnose debug crashlog read Example crash shown below:  11841: 2025-08-31 12:35:30 <27468> firmware FortiGate-VM64 v7.6.4,build3596b3596,250820 (GA.F) (Release) 11842: 2025-08-31 12:35:30 <27468> application snmpd 11843: 2025-08-31 12:35:30 <27468> *** signal 31 (Bad system call) received *** 11844: 2025-08-31 12:35:30 <27468> Register dump: 11845: 2025-08-31 12:35:30 <27468> RAX: 000000000000001f RBX: 00007ffebed77c60 11846: 2025-08-31 12:35:30 <27468> RCX: 00007f0f5c0caa47 RDX: 00007ffebed77a60 11847: 2025-08-31 12:35:30 <27468> R08: 0000000000000000 R09: 00007f0f5c196be0 11848: 2025-08-31 12:35:30 <27468> R10: 0000000000000000 R11: 0000000000000246 11849: 2025-08-31 12:35:30 <27468> R12: 000000000007000e R13: 0000000000000000 11850: 2025-08-31 12:35:30 <27468> R14: 000055f305b2ada0 R15: 0000000000000001 11851: 2025-08-31 12:35:30 <27468> RSI: 0000000000000002 RDI: 000000000007000e 11852: 2025-08-31 12:35:30 <27468> RBP: 00007ffebed77af0 RSP: 00007ffebed77a58 11853: 2025-08-31 12:35:30 <27468> RIP: 00007f0f5c0caa47 EFLAGS: 0000000000000246 11854: 2025-08-31 12:35:30 <27468> CS: 0033 FS: 0000 GS: 0000 11855: 2025-08-31 12:35:30 <27468> Trap: 0000000000000000 Error: 0000000000000000 11856: 2025-08-31 12:35:30 <27468> OldMask: 0000000000000000 11857: 2025-08-31 12:35:30 <27468> CR2: 0000000000000000 11858: 2025-08-31 12:35:30 <27468> stack: 0x7ffebed77a58 - 0x7ffebed79010 11859: 2025-08-31 12:35:30 <27468> Backtrace: 11860: 2025-08-31 12:35:30 <27468> [0x7f0f5c0caa47] => /lib/libc.so.6 {0x7f0f5bfce000} 11861: 2025-08-31 12:35:30 <27468> [0x7f0f631301c7] => /lib/libncfg.so {0x7f0f630bd000} 11862: 2025-08-31 12:35:30 <27468> [0x7f0f631302f0] => /lib/libncfg.so {0x7f0f630bd000} 11863: 2025-08-31 12:35:30 <27468> [0x55f2fedad494] => /bin/snmpd {0x55f2faa3d000} 11864: 2025-08-31 12:35:30 <27468> [0x55f2fed50451] => /bin/snmpd {0x55f2faa3d000} 11865: 2025-08-31 12:35:30 <27468> [0x55f2fed4f7a9] => /bin/snmpd {0x55f2faa3d000} 11866: 2025-08-31 12:35:30 <27468> [0x55f2fed53a2b] => /bin/snmpd {0x55f2faa3d000} 11867: 2025-08-31 12:35:30 <27468> [0x55f2fed52b35] => /bin/snmpd {0x55f2faa3d000} 11868: 2025-08-31 12:35:30 <27468> [0x55f2fcbc314a] => /bin/snmpd {0x55f2faa3d000} 11869: 2025-08-31 12:35:30 <27468> [0x55f2fcbb8ff2] => /bin/snmpd {0x55f2faa3d000} 11870: 2025-08-31 12:35:30 <27468> [0x55f2fad90afc] => /bin/snmpd {0x55f2faa3d000} 11871: 2025-08-31 12:35:30 <27468> [0x55f2fad9f951] => /bin/snmpd {0x55f2faa3d000} 11872: 2025-08-31 12:35:30 <27468> [0x55f2fad9b385] => /bin/snmpd {0x55f2faa3d000} 11873: 2025-08-31 12:35:30 <27468> [0x55f2fad99698] => /bin/snmpd {0x55f2faa3d000} 11874: 2025-08-31 12:35:30 <27468> [0x7f0f5bff1e1b] => /lib/libc.so.6 {0x7f0f5bfce000} 11875: 2025-08-31 12:35:30 <27468> [0x55f2fad8fdaa] => /bin/snmpd {0x55f2faa3d000} 11876: 2025-08-31 12:35:30 <27468> fortidev 6.0.2.0008 11877: 2025-08-31 12:35:30 the killed daemon is /bin/snmpd: status=0x1f 11878: 2025-08-31 12:35:32 snmpd previously crashed 7 times. The last crash was at 2025-08-31 12:35:30. There is no workaround available to fix this issue. This issue is fixed in FortiOS versions 7.6.5 and 8.0.