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List:       net-snmp-bugs
Subject:    [ net-snmp-Bugs-3537085 ] net-snmp is coring when stopped
From:       SourceForge.net <noreply () sourceforge ! net>
Date:       2012-06-27 6:14:16
Message-ID: E1SjlW6-00058I-4q () sfs-ml-1 ! v29 ! ch3 ! sourceforge ! com
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Bugs item #3537085, was opened at 2012-06-21 23:50
Message generated for change (Comment added) made by thyag
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112694&aid=3537085&group_id=12694

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: snmptrapd
Group: solaris
>Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: thyagaraj (thyag)
Assigned to: Nobody/Anonymous (nobody)
Summary: net-snmp is coring when stopped

Initial Comment:
Net-snmp is coring during stop of net-snmp. Below is the pstack of the core.
bash-3.00$ pstack 18633/core
core '18633/core' of 18633:     /opt/SMAW/SMAWrtp/bin/RtpSnm -p 99
 fd1cc8d0 _lwp_kill (6, 0, 0, fdb433f0, ffffffff, 6) + 8
 fd141a4c abort    (0, 1, fdb434c4, eea74, fd233418, 0) + 110 
 fdb433f0 RtpWriteCoreInternal (3bd08, ffbfe310, ffbfe058, 0, fd5f2a00, ffbfe058) + 5b8
 fdb434c4 RtpWriteCoreOmni (3bd08, ffbfe310, ffbfe058, 18fb8, 0, 0) + c
 00019044 RtpSnmSigHandler (6, ffbfe310, ffbfe058, 0, fd5f2a00, ffbfe058) + 8c
 fd1c8d08 __sighndlr (6, ffbfe310, ffbfe058, 18fb8, 0, 0) + c
 fd1bd3a0 call_user_handler (6, ffbffeff, 8, 0, fd5f2a00, ffbfe058) + 3b8
 fd1bd588 sigacthandler (6, ffbfe310, ffbfe058, eea74, 0, fd141a0c) + 60
 --- called from signal handler with signal 6 (SIGABRT) ---
 fd1cc8d0 _lwp_kill (6, 6, 5, 6, 72d98, 0) + 8
 fd141a0c abort    (ffbfe450, 0, fd59884c, eea74, 86000, fd59884c) + d0
 fdb60b00 free     (86000, 879c8, 0, 80, 20, 80000000) + 20c
 fd59884c free_slots (0, 2, 0, 0, fa9d0140, 0) + ac
 fd5a4840 snmp_call_callbacks (0, 2, 0, 1e094, 303dc, 303e0) + 2a0
 fd55eae0 snmp_shutdown (1e488, 30b48, 48c9, 2e800, fa9d0140, 0) + 20
 0001c57c nativeSubAgentClose (0, 18, 5, 1e094, 303dc, 303e0) + 84
 00019fb0 main     (3, ffbfe8fc, ffbfe90c, 2e800, fa9d0140, 0) + d68
 00012990 _start   (0, 0, 0, 0, 0, 0) + 108
bash-3.00$

OS:SunOS netrace61 5.10 Generic_142900-14 sun4v sparc SUNW,Netra-T2000
Net-snmp version:5.4.2.1-7

----------------------------------------------------------------------

>Comment By: thyagaraj (thyag)
Date: 2012-06-26 23:14

Message:

RtpSnm01 is a nodemanager application which manages all the applications on
the node.
RtpSnm01 will start, stop all applications.
so here when we shutdown the application RtpSnm01 in turn shutdown
net-snmp, below is how we call the stop method.
From snm code "snmp_shutdown" function was called like below.    

        snmp_shutdown("RtpSnmSubAgent");

mdb o/p is shown below

> ::stack
libc.so.1`_lwp_kill+8(6, 0, 0, fdb433f0, ffffffff, 6)
libc.so.1`abort+0x110(0, 1, fdb434c4, eea74, fd233418, 0)
libRtpCommon.so`RtpWriteCoreInternal+0x5b8(3bd08, ffbfe4a0, ffbfe1e8, 0,
fd5f2a00, ffbfe1e8)
libRtpCommon.so`RtpWriteCoreOmni+0xc(3bd08, ffbfe4a0, ffbfe1e8, 18fb8, 0,
0)
RtpSnmSigHandler+0x8c(6, ffbfe4a0, ffbfe1e8, 0, fd5f2a00, ffbfe1e8)
libc.so.1`__sighndlr+0xc(6, ffbfe4a0, ffbfe1e8, 18fb8, 0, 0)
libc.so.1`call_user_handler+0x3b8(6, ffbffeff, 8, 0, fd5f2a00, ffbfe1e8)
libc.so.1`sigacthandler+0x60(6, ffbfe4a0, ffbfe1e8, eea74, 0, fd141a0c)
libc.so.1`_lwp_kill+8(6, 6, 5, 6, 72d98, 0)
libc.so.1`abort+0xd0(ffbfe5e0, 0, fd59884c, eea74, 86000, fd59884c)
libmtmalloc.so.1`free+0x20c(86000, 879c8, 0, 80, 20, 80000000)
libnetsnmp.so.5.0.9`free_slots+0xac(0, 2, 0, 0, fa9d0140, 0)
libnetsnmp.so.5.0.9`snmp_call_callbacks+0x2a0(0, 2, 0, 1e094, 303dc,
303e0)
libnetsnmp.so.5.0.9`snmp_shutdown+0x20(1e488, 30b48, 4282, 2e800, fa9d0140,
0)
nativeSubAgentClose+0x84(0, 18, 5, 1e094, 303dc, 303e0)
main+0xd68(3, ffbfea8c, ffbfea9c, 2e800, fa9d0140, 0)
_start+0x108(0, 0, 0, 0, 0, 0)
>
Even gdb also confirming  same point. 

(gdb) bt
#0  0xfd1cc8d0 in _lwp_kill () from /lib/libc.so.1
#1  0xfd165d84 in raise () from /lib/libc.so.1
#2  0xfd141a54 in abort () from /lib/libc.so.1
#3  0xfdb433f8 in RtpWriteCoreInternal (logicalname=0x3bd08 "RtpSnm01") at
RtpWriteCore.c:466
#4  0xfdb434cc in RtpWriteCoreOmni (logicalname=0x3bd08 "RtpSnm01") at
RtpWriteCore.c:537
#5  0x0001904c in RtpSnmSigHandler (sig=6, si=0xffbfe3e0, d=0xffbfe128) at
snm.c:3158
#6  <signal handler called>
#7  0xfd1cc8d0 in _lwp_kill () from /lib/libc.so.1
#8  0xfd165d84 in raise () from /lib/libc.so.1
#9  0xfd141a14 in abort () from /lib/libc.so.1
#10 0xfdb60b08 in free () from /usr/lib/secure/libmtmalloc.so
#11 0xfd598854 in free_slots () from /usr/sfw/lib/libnetsnmp.so.5
#12 0xfd5a4848 in snmp_call_callbacks () from /usr/sfw/lib/libnetsnmp.so.5
#13 0xfd55eae8 in snmp_shutdown () from /usr/sfw/lib/libnetsnmp.so.5
#14 0x0001c584 in nativeSubAgentClose () at RtpSnmSubAgent.c:195
#15 0x00019fb8 in main (argc=3, argv=0xffbfe9cc) at snm.c:3558
(gdb)

Here we suspect that problem starts from "snmp_shutdown" function.
#9  0xfd141a14 in abort () from /lib/libc.so.1
#10 0xfdb60b08 in free () from /usr/lib/secure/libmtmalloc.so
#11 0xfd598854 in free_slots () from /usr/sfw/lib/libnetsnmp.so.5
#12 0xfd5a4848 in snmp_call_callbacks () from /usr/sfw/lib/libnetsnmp.so.5
#13 0xfd55eae8 in snmp_shutdown () from /usr/sfw/lib/libnetsnmp.so.5



----------------------------------------------------------------------

Comment By: Thomas Anders (tanders)
Date: 2012-06-22 03:38

Message:
What package is that? It doesn't look like stock net-snmp to me. You may
want to report the bug to the party responsible for that package instead.

----------------------------------------------------------------------

Comment By: Thomas Anders (tanders)
Date: 2012-06-22 03:30

Message:
Please (re)try with the latest version from the 5.4.x branch or switch to
the latest 5.7.x release.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112694&aid=3537085&group_id=12694

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