Hi Team,
I am getting snmpd crash with below trace, during a system boot, or
snmp restart with config changes.
I am having netsnm version 5.7.2 running in my box.
Trace 1.
==========
Core was generated by `/usr/sbin/snmpd -Lo0-6d -f -x
/var/agentx/master_VRF_1 -p /var/run/openvswitch/'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007efc9524cf41 in snmp_sess_read2
(sessp=sessp@entry=0x7efc93cd2040, fdset=fdset@entry=0x7ffd4e23ef00)
at /usr/src/debug/net-snmp/5.7.2-r1/net-snmp-5.7.2/snmplib/snmp_api.c:6200
6200 if (rc && pss->s_snmp_errno) {
(gdb) bt full
#0 0x00007efc9524cf41 in snmp_sess_read2
(sessp=sessp@entry=0x7efc93cd2040, fdset=fdset@entry=0x7ffd4e23ef00)
at /usr/src/debug/net-snmp/5.7.2-r1/net-snmp-5.7.2/snmplib/snmp_api.c:6200
psl = 0x7efc93cd2040
pss = 0x0
rc = -1
#1 0x00007efc9524cf8b in snmp_read2 (fdset=0x7ffd4e23ef00) at
/usr/src/debug/net-snmp/5.7.2-r1/net-snmp-5.7.2/snmplib/snmp_api.c:5799
slp = 0x7efc93cd2040
#2 0x0000000000403ff5 in ?? ()
No symbol table info available.
#3 0x00007efc94e88740 in __libc_start_main (main=0x402600, argc=7,
argv=0x7ffd4e23f1c8, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>,
stack_end=0x7ffd4e23f1b8) at
/usr/src/debug/glibc/2.23-r0/git/csu/libc-start.c:289
self = <optimized out>
result = <optimized out>
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0,
-9062587388492096986, 4210992, 140725914431936, 0, 0,
9061704306574383654, 9205939935531391526},
mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x4043f0,
0x7ffd4e23f1c8}, data = {prev = 0x0, cleanup = 0x0, canceltype =
4211696}}}
not_first_call = <optimized out>
#4 0x0000000000404159 in ?? ()
No symbol table info available.
Trace 2:
=======
Core was generated by `/usr/sbin/snmpd -Lo0-6d -f -x
/var/agentx/master_swns -p /var/run/openvswitch/s'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 _sess_read (sessp=sessp@entry=0xa1,
fdset=fdset@entry=0xffffe9265ea0) at
/usr/src/debug/net-snmp/5.7.2-r1/net-snmp-5.7.2/snmplib/snmp_api.c:5825
5825 netsnmp_transport *transport = slp ? slp->transport : NULL;
(gdb) bt
#0 _sess_read (sessp=sessp@entry=0xa1,
fdset=fdset@entry=0xffffe9265ea0) at
/usr/src/debug/net-snmp/5.7.2-r1/net-snmp-5.7.2/snmplib/snmp_api.c:5825
#1 0x0000ffff9ee3769c in snmp_sess_read2 (sessp=sessp@entry=0xa1,
fdset=fdset@entry=0xffffe9265ea0) at
/usr/src/debug/net-snmp/5.7.2-r1/net-snmp-5.7.2/snmplib/snmp_api.c:6206
#2 0x0000ffff9ee376f4 in snmp_read2 (fdset=0xffffe9265ea0) at
/usr/src/debug/net-snmp/5.7.2-r1/net-snmp-5.7.2/snmplib/snmp_api.c:5808
#3 0x0000000000404584 in ?? ()
This issue is not continously reproducible but seeing intermittently,
when snmp agent/subagent restarts, and snmpwalk happens in the
background.
Please help me understand the issue further and help me with the
patch/ if this issue is already taken care in the upstream.
Thanks,
Surya
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