# gdb --args /usr/sbin/snmpd -LS4d -f -Lf /var/log/snmpd.log -p /var/run/snmpd.pid -c /etc/snmp/snmpd.conf -I -smux
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu"...
(gdb) run
Starting program: /usr/sbin/snmpd -LS4d -f -Lf /var/log/snmpd.log -p /var/run/snmpd.pid -c /etc/snmp/snmpd.conf -I -smux
[Thread debugging using libthread_db enabled]
[New Thread 0x7f3b188476f0 (LWP 24475)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f3b188476f0 (LWP 24475)]
0x00007f3b17ee448c in var_extensible_old (vp=0x7fff60aef9f0, name=0x238dbc0, length=<value optimized out>, exact=<value optimized out>, 
    var_len=0x7fff60af0210, write_method=0x7fff60af0218) at agent/extend.c:1362
1362	agent/extend.c: No such file or directory.
	in agent/extend.c
(gdb) bt full
#0  0x00007f3b17ee448c in var_extensible_old (vp=0x7fff60aef9f0, name=0x238dbc0, length=<value optimized out>, exact=<value optimized out>, 
    var_len=0x7fff60af0210, write_method=0x7fff60af0218) at agent/extend.c:1362
	exten = (netsnmp_old_extend *) 0x223b968
	long_ret = 0
#1  0x00007f3b181e3202 in netsnmp_old_api_helper (handler=<value optimized out>, reginfo=0x223d9f0, reqinfo=0x2326650, requests=0x234af60) at old_api.c:281
	save = {1, 3, 6, 1, 4, 1, 2021, 8, 1, 101, 1, 35, 10448170, 140734815469200, 140734815469624, 139891761544616, 0, 0, 139891791152336, 
  139891786654675, 139891761570776, 139891786634344, 4294967296, 4294967923, 36991584, 139891791222808, 140734815469680, 140734815469624, 668682915, 
  140734815469600, 0, 139891789046574, 0, 0, 139891379798017, 0, 1, 140734815469392, 140734815469816, 139891761544616, 0, 4704214287, 0, 139891791222808, 
  140734815469728, 139891791221952, 139891786654675, 139891789045984, 139891761544012, 139891379798034, 4123233, 140734815469504, 140734815469928, 
  139891761544616, 0, 0, 139891791152336, 139891786646137, 139891761570776, 139891786632808, 4294967296, 4294968236, 1052161670, 139891791222808, 64, 
  140734815469679, 139891761559664, 139891791152336, 1, 4294967295, 0, 2377296, 140734815469888, 35906096, 0, 1, 139891786620928, 139891789063946, 
  4294967297, 139891761828960, 140734815469728, 10, 104919279427333, 37035200, 37280368, 139891789092226, 0, 1187158373339886592, 10, 37035200, 37280368, 
  140734815469888, 35906096, 0, 1, 139891786788655, 0, 10, 140734815470160, 37034800, 37034834, 139891789063946, 139891379798016, 0, 139891761567176, 
  139891791152336, 7885080995474597640, 1187158373339886592, 432, 140734815470080, 1, 12, 1, 1, 140734815470080, 139891786789393, 35243216, 
  139891761898057, 12, 35905840, 35905840, 37156960, 1, 37280656, 0, 139891786704209, 37280368, 35906096}
	savelen = 11
	compat_var = {magic = 101 'e', type = 4 '\004', acl = 1, findVar = 0x7f3b17ee4350 <var_extensible_old>, namelen = 10 '\n', name = {1, 3, 6, 1, 4, 
    1, 2021, 8, 1, 101, 11479958814929715200, 140734815469174, 0, 0, 4294967296, 140734815469176, 11479958608771284992, 139891762081930, 140734815468272, 
    140734815469235, 140734815469391, 139891770462256, 35221776, 3834591005672210432, 0, 206158430232, 140734815468752, 140734815468544, 18, 2936815672, 
    139891789045984, 139891766796336, 56, 45887744, 140734815468336, 140734815468760, 139891766803304, 0, 139891791141240, 139891791157648, 
    139891778860841, 139891766854160, 139891778858512, 4294967296, 4294967674, 44244106, 139891791161392, 140734815468816, 1187158373339886592, 37213697, 
    139891761787925, 140734815468464, 15, 140734815468759, 48, 139891762056747, 140734815469992, 140734815468864, 139891761789878, 139891770382848, 0, 
    140734815469992, 139891770382848, 1152, 139891767290097, 140734815469935, 139891770382960, 140734815469919, 48, 1184, 140734815468687, 140734815468704, 
    1187158373339886592, 37213712, 139891761787925, 140734815404032, 0, 37213710, 140734815468744, 37279232, 140734815469992, 140734815468864, 
    139891761782408, 8589934591, 139891767323394, 140734815469904, 37279216, 88, 37279264, 11, 139891761610953, 0, 37156672, 37279240, 140734815469992, 
    37279216, 139891761714093, 140734815469992, 140734815468912, 140734815469896, 140734815468864, 140734815469904, 37213712, 1, 3, 6, 1, 4, 1, 2021, 8, 1, 
    101, 1, 139891782453814, 86, 139891778881717, 36853792, 140734815469476, 140734815469348, 140734815469616, 140734815469744, 140734815469344, 36853792, 
    0, 36991584, 35221520, 139891766825792}}
	exact = 0
	status = 35905520
	vp = (struct variable *) 0x223da50
	write_method = (WriteMethod *) 0
	len = 8
	access = (u_char *) 0x223dff0 "\200�#\002"
	oldasp = <value optimized out>
	__FUNCTION__ = "netsnmp_old_api_helper"
#2  0x00007f3b18416847 in netsnmp_call_handlers (reginfo=0x223d9f0, reqinfo=0x2326650, requests=0x234af60) at agent_handler.c:435
	request = <value optimized out>
	status = <value optimized out>
	__FUNCTION__ = "netsnmp_call_handlers"
#3  0x00007f3b18407611 in handle_var_requests (asp=0x236f860) at snmp_agent.c:2528
	i = 0
	retstatus = <value optimized out>
	status = 5
	final_status = 0
#4  0x00007f3b1840919b in handle_pdu (asp=0x236f860) at snmp_agent.c:3324
	status = 0
---Type <return> to continue, or q <return> to quit--- 
	inclusives = 0
	v = <value optimized out>
	__FUNCTION__ = "handle_pdu"
#5  0x00007f3b1840b768 in netsnmp_handle_request (asp=0x236f860, status=<value optimized out>) at snmp_agent.c:3120
	__FUNCTION__ = "netsnmp_handle_request"
#6  0x00007f3b1840c2b2 in handle_snmp_packet (op=<value optimized out>, session=<value optimized out>, reqid=<value optimized out>, 
    pdu=<value optimized out>, magic=<value optimized out>) at snmp_agent.c:1852
	asp = (netsnmp_agent_session *) 0x236f860
	status = 0
	access_ret = 0
	rc = <value optimized out>
	__FUNCTION__ = "handle_snmp_packet"
#7  0x00007f3b16c46869 in _sess_process_packet (sessp=0x2327030, sp=0x23213f0, isp=0x2346960, transport=<value optimized out>, 
    opaque=<value optimized out>, olength=<value optimized out>, packetptr=0x237d5e0 "0.\002\001", length=48) at snmp_api.c:5356
	pdu = (netsnmp_pdu *) 0x236f740
	rp = <value optimized out>
	orp = <value optimized out>
	sptr = <value optimized out>
	ret = 0
	handled = 1
	__FUNCTION__ = "_sess_process_packet"
#8  0x00007f3b16c48a4d in _sess_read (sessp=0x2327030, fdset=0x7fff60af0550) at snmp_api.c:5772
	sp = (netsnmp_session *) 0x23213f0
	isp = (struct snmp_internal_session *) 0x2346960
	transport = (netsnmp_transport *) 0x23471e0
	pdulen = <value optimized out>
	rxbuf = <value optimized out>
	length = 0
	olength = 20
	rc = <value optimized out>
	opaque = (void *) 0x2347260
	__FUNCTION__ = "_sess_read"
#9  0x00007f3b16c48ff9 in snmp_sess_read (sessp=0x238dc10, fdset=0x7fff60aef548) at snmp_api.c:5791
	pss = <value optimized out>
	rc = 404508072
#10 0x00007f3b16c4904b in snmp_read (fdset=0x7fff60af0550) at snmp_api.c:5408
	slp = (struct session_list *) 0x2327030
#11 0x0000000000404f43 in main (argc=<value optimized out>, argv=<value optimized out>) at snmpd.c:1198
	options = "aAc:CdD::fhHI:l:L:m:M:n:p:P:qrsS:UvV-:Y:g:u:x:X", '\0' <repeats 80 times>
	arg = <value optimized out>
	i = <value optimized out>
	ret = <value optimized out>
	dont_fork = 1
	do_help = <value optimized out>
	uid = <value optimized out>
	gid = 0
	agent_mode = -1
---Type <return> to continue, or q <return> to quit---
	cptr = <value optimized out>
	argvptr = <value optimized out>
	pid_file = 0x7fff60af19eb "/var/run/snmpd.pid"
	option_compatability = "-Le"
	fd = <value optimized out>
	PID = <value optimized out>
	__FUNCTION__ = "main"
(gdb) info registers
rax            0x0	0
rbx            0x223b968	35895656
rcx            0x2	2
rdx            0x7f3b181c4da8	139891784306088
rsi            0x7fff60aef548	140734815466824
rdi            0x238dc10	37280784
rbp            0x238dbc0	0x238dbc0
rsp            0x7fff60aef970	0x7fff60aef970
r8             0x65	101
r9             0x7fff60af0218	140734815470104
r10            0x7fff60aef2a0	140734815466144
r11            0x7f3b17192990	139891767323024
r12            0x7fff60af0210	140734815470096
r13            0x7fff60aef9f0	140734815468016
r14            0x7fff60af0218	140734815470104
r15            0x223da50	35904080
rip            0x7f3b17ee448c	0x7f3b17ee448c <var_extensible_old+316>
eflags         0x10297	[ CF PF AF SF IF RF ]
cs             0x33	51
ss             0x2b	43
ds             0x0	0
es             0x0	0
fs             0x0	0
gs             0x0	0
fctrl          0x37f	895
fstat          0x0	0
ftag           0xffff	65535
fiseg          0x0	0
fioff          0x0	0
foseg          0x0	0
fooff          0x0	0
fop            0x0	0
mxcsr          0x1f80	[ IM DM ZM OM UM PM ]
(gdb) x/16i $pc
0x7f3b17ee448c <var_extensible_old+316>:	mov    0x60(%rax),%rdi
0x7f3b17ee4490 <var_extensible_old+320>:	callq  0x7f3b17ec39b0 <netsnmp_cache_check_and_reload@plt>
0x7f3b17ee4495 <var_extensible_old+325>:	mov    0x8(%rbx),%rdx
0x7f3b17ee4499 <var_extensible_old+329>:	cmpl   $0x1,0x48(%rdx)
0x7f3b17ee449d <var_extensible_old+333>:	jle    0x7f3b17ee4532 <var_extensible_old+482>
0x7f3b17ee44a3 <var_extensible_old+339>:	mov    $0xffffffffffffffff,%rax
0x7f3b17ee44aa <var_extensible_old+346>:	sub    0x40(%rdx),%rax
0x7f3b17ee44ae <var_extensible_old+350>:	mov    0x50(%rdx),%rdx
0x7f3b17ee44b2 <var_extensible_old+354>:	add    0x8(%rdx),%rax
0x7f3b17ee44b6 <var_extensible_old+358>:	mov    %rax,(%r12)
0x7f3b17ee44ba <var_extensible_old+362>:	mov    0x8(%rbx),%rax
0x7f3b17ee44be <var_extensible_old+366>:	mov    0x40(%rax),%rax
0x7f3b17ee44c2 <var_extensible_old+370>:	jmpq   0x7f3b17ee4393 <var_extensible_old+67>
0x7f3b17ee44c7 <var_extensible_old+375>:	mov    0x2c90b2(%rip),%rax        # 0x7f3b181ad580 <_fini+2343288>
0x7f3b17ee44ce <var_extensible_old+382>:	mov    %rax,(%r14)
0x7f3b17ee44d1 <var_extensible_old+385>:	mov    0x2c9480(%rip),%rax        # 0x7f3b181ad958 <_fini+2344272>
(gdb) thread apply all backtrace

Thread 1 (Thread 0x7f3b188476f0 (LWP 24475)):
#0  0x00007f3b17ee448c in var_extensible_old (vp=0x7fff60aef9f0, name=0x238dbc0, length=<value optimized out>, exact=<value optimized out>, 
    var_len=0x7fff60af0210, write_method=0x7fff60af0218) at agent/extend.c:1362
#1  0x00007f3b181e3202 in netsnmp_old_api_helper (handler=<value optimized out>, reginfo=0x223d9f0, reqinfo=0x2326650, requests=0x234af60) at old_api.c:281
#2  0x00007f3b18416847 in netsnmp_call_handlers (reginfo=0x223d9f0, reqinfo=0x2326650, requests=0x234af60) at agent_handler.c:435
#3  0x00007f3b18407611 in handle_var_requests (asp=0x236f860) at snmp_agent.c:2528
#4  0x00007f3b1840919b in handle_pdu (asp=0x236f860) at snmp_agent.c:3324
#5  0x00007f3b1840b768 in netsnmp_handle_request (asp=0x236f860, status=<value optimized out>) at snmp_agent.c:3120
#6  0x00007f3b1840c2b2 in handle_snmp_packet (op=<value optimized out>, session=<value optimized out>, reqid=<value optimized out>, 
    pdu=<value optimized out>, magic=<value optimized out>) at snmp_agent.c:1852
#7  0x00007f3b16c46869 in _sess_process_packet (sessp=0x2327030, sp=0x23213f0, isp=0x2346960, transport=<value optimized out>, 
    opaque=<value optimized out>, olength=<value optimized out>, packetptr=0x237d5e0 "0.\002\001", length=48) at snmp_api.c:5356
#8  0x00007f3b16c48a4d in _sess_read (sessp=0x2327030, fdset=0x7fff60af0550) at snmp_api.c:5772
#9  0x00007f3b16c48ff9 in snmp_sess_read (sessp=0x238dc10, fdset=0x7fff60aef548) at snmp_api.c:5791
#10 0x00007f3b16c4904b in snmp_read (fdset=0x7fff60af0550) at snmp_api.c:5408
#11 0x0000000000404f43 in main (argc=<value optimized out>, argv=<value optimized out>) at snmpd.c:1198

(gdb) q