Re: snmpd crashes when wlan0 interface acquire IP address

+Bill and Larry

-Himanshu

On Thu, Jul 9, 2020 at 2:02 AM Himanshu Sharma <[email protected]>
wrote:

> Hi All,
>
> I am facing a very weird issue.
> I have 2  interfaces on my system.
> *The moment the wlan0 acquires the ip address snmpd crashes.*
> If there is only one interface let say *eth0*.,snmpd works fine.
> One more problem is *coredump* analysis of crash using gdb, shows
> different backtrace everytime.
> I am attaching the back trace for reference..Also the ifconfig of my local
> system.
> It would be great if anyone can help me.. I am not able to find any
> solution 😞
>
> -Himanshu
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> *#0  __libc_do_syscall () at
> ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:47#1  0xb6d6d1b2 in
> __libc_signal_restore_set (set=0xbeb7b320) at
> ../sysdeps/unix/sysv/linux/nptl-signals.h:79#2  __GI_raise
> (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:48#3  0xb6d6de3a in
> __GI_abort () at abort.c:89#4  0xb6d947da in __libc_message
> (do_abort=do_abort@entry=2, fmt=<optimized out>) at
> ../sysdeps/posix/libc_fatal.c:175#5  0xb6d98b28 in malloc_printerr
> (action=<optimized out>, str=0xb6e14de4 "corrupted double-linked list",
> ptr=<optimized out>, ar_ptr=<optimized out>) at malloc.c:5087#6  0xb6d9b0d4
> in _int_malloc (av=av@entry=0xb6e317a4 <main_arena>, bytes=bytes@entry=12)
> at malloc.c:3743#7  0xb6d9c556 in __libc_calloc (n=<optimized out>,
> elem_size=<optimized out>) at malloc.c:3246#8  0xb6ecbcb8 in
> init_agent_snmp_session (session=0x1dceac0, pdu=<optimized out>) at
> snmp_agent.c:1587#9  0xb6ecd368 in handle_snmp_packet (session=<optimized
> out>, pdu=<optimized out>, magic=0x0, reqid=<optimized out>, op=<optimized
> out>) at snmp_agent.c:2227#10 0xb6e503e4 in _sess_process_packet_handle_pdu
> (isp=0x1dcea78, isp=0x1dcea78, transport=0x1dce888, pdu=0x1dd68e0,
> sp=0x1dceac0, sessp=<optimized out>) at snmp_api.c:5807#11
> _sess_process_packet (sessp=sessp@entry=0x1dcea60, sp=sp@entry=0x1dceac0,
> isp=0x1dcea78, transport=transport@entry=0x1dce888,
> opaque=opaque@entry=0x1dd4b18, olength=olength@entry=60,
> packetptr=0x1de5060 "0M\002\001", length=79) at snmp_api.c:5863#12
> 0xb6e50a3a in _sess_read (sessp=sessp@entry=0x1dcea60,
> fdset=fdset@entry=0xbeb7b9a0) at snmp_api.c:6124#13 0xb6e50b14 in
> snmp_sess_read2 (sessp=sessp@entry=0x1dcea60, fdset=fdset@entry=0xbeb7b9a0)
> at snmp_api.c:6397#14 0xb6e50b44 in snmp_read2
> (fdset=fdset@entry=0xbeb7b9a0) at snmp_api.c:5912#15 0x00012c0c in receive
> () at snmpd.c:1342#16 0x000126a4 in main (argc=<optimized out>,
> argv=<optimized out>) at snmpd.c:1125*
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> *#1  0xb6d6d1b2 in __libc_signal_restore_set (set=0xbeb7b320) at
> ../sysdeps/unix/sysv/linux/nptl-signals.h:79#2  __GI_raise
> (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:48#3  0xb6d6de3a in
> __GI_abort () at abort.c:89#4  0xb6d947da in __libc_message
> (do_abort=do_abort@entry=2, fmt=<optimized out>) at
> ../sysdeps/posix/libc_fatal.c:175#5  0xb6d98b28 in malloc_printerr
> (action=<optimized out>, str=0xb6e14de4 "corrupted double-linked list",
> ptr=<optimized out>, ar_ptr=<optimized out>) at malloc.c:5087#6  0xb6d9b0d4
> in _int_malloc (av=av@entry=0xb6e317a4 <main_arena>, bytes=bytes@entry=12)
> at malloc.c:3743#7  0xb6d9c556 in __libc_calloc (n=<optimized out>,
> elem_size=<optimized out>) at malloc.c:3246#8  0xb6ecbcb8 in
> init_agent_snmp_session (session=0x1dceac0, pdu=<optimized out>) at
> snmp_agent.c:1587#9  0xb6ecd368 in handle_snmp_packet (session=<optimized
> out>, pdu=<optimized out>, magic=0x0, reqid=<optimized out>, op=<optimized
> out>) at snmp_agent.c:2227#10 0xb6e503e4 in _sess_process_packet_handle_pdu
> (isp=0x1dcea78, isp=0x1dcea78, transport=0x1dce888, pdu=0x1dd68e0,
> sp=0x1dceac0, sessp=<optimized out>) at snmp_api.c:5807#11
> _sess_process_packet (sessp=sessp@entry=0x1dcea60, sp=sp@entry=0x1dceac0,
> isp=0x1dcea78, transport=transport@entry=0x1dce888,
> opaque=opaque@entry=0x1dd4b18, olength=olength@entry=60,
> packetptr=0x1de5060 "0M\002\001", length=79) at snmp_api.c:5863#12
> 0xb6e50a3a in _sess_read (sessp=sessp@entry=0x1dcea60,
> fdset=fdset@entry=0xbeb7b9a0) at snmp_api.c:6124#13 0xb6e50b14 in
> snmp_sess_read2 (sessp=sessp@entry=0x1dcea60, fdset=fdset@entry=0xbeb7b9a0)
> at snmp_api.c:6397#14 0xb6e50b44 in snmp_read2 (fdset=0xbeb7b9a0) at
> snmp_api.c:5912*
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> *#1  0xb6dc21b2 in __libc_signal_restore_set (set=0xbec483a8) at
> ../sysdeps/unix/sysv/linux/nptl-signals.h:79#2  __GI_raise
> (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:48#3  0xb6dc2e3a in
> __GI_abort () at abort.c:89#4  0xb6ded850 in __malloc_assert
> (assertion=<optimized out>, file=<optimized out>, line=3068686472,
> line@entry=3738, function=0xb6e6ab44 <__func__.15585> "_int_malloc") at
> malloc.c:296#5  0xb6df02c6 in _int_malloc (av=0x2, av@entry=0xb6e867a4
> <main_arena>, bytes=bytes@entry=24) at malloc.c:3738#6  0xb6df1556 in
> __libc_calloc (n=<optimized out>, elem_size=<optimized out>) at
> malloc.c:3246#7  0xb6f1b5d2 in netsnmp_create_delegated_cache
> (handler=handler@entry=0xecf440, reginfo=reginfo@entry=0xecf6f8,
> reqinfo=reqinfo@entry=0xed57f8, requests=requests@entry=0xed6e60,
> localinfo=localinfo@entry=0xeba978) at agent_handler.c:881#8  0xb6f232d4 in
> agentx_master_handler (handler=0xecf440, reginfo=0xecf6f8,
> reqinfo=0xed57f8, requests=0xed6e60) at mibgroup/agentx/master.c:610#9
>  0xb6f1b16c in netsnmp_call_handler (requests=0xed6e60, reqinfo=0xed57f8,
> reginfo=0xecf6f8, next_handler=0xecf440) at agent_handler.c:546#10
> netsnmp_call_handlers (reginfo=0xecf6f8, reqinfo=0xed57f8,
> requests=0xed6e60) at agent_handler.c:631#11 0xb6f21bb4 in
> handle_var_requests (asp=asp@entry=0xed57a8) at snmp_agent.c:3017#12
> 0xb6f22076 in handle_pdu (asp=0xed57a8) at snmp_agent.c:3803#13 0xb6f22140
> in netsnmp_handle_request (asp=asp@entry=0xed57a8, status=status@entry=0)
> at snmp_agent.c:3692#14 0xb6f2233e in handle_snmp_packet
> (session=<optimized out>, pdu=<optimized out>, magic=<optimized out>,
> reqid=<optimized out>, op=<optimized out>) at snmp_agent.c:2299#15
> 0xb6ea53e4 in _sess_process_packet_handle_pdu (isp=0xeb9aa0, isp=0xeb9aa0,
> transport=0xeb98b0, pdu=0xed55c8, sp=0xeb9ae8, sessp=<optimized out>) at
> snmp_api.c:5807#16 _sess_process_packet (sessp=sessp@entry=0xeb9a88,
> sp=sp@entry=0xeb9ae8, isp=0xeb9aa0, transport=transport@entry=0xeb98b0,
> opaque=opaque@entry=0xebd170, olength=olength@entry=60,
> packetptr=0xebf0e8 "03\002\001", length=53) at snmp_api.c:5863#17
> 0xb6ea5a3a in _sess_read (sessp=sessp@entry=0xeb9a88,
> fdset=fdset@entry=0xbec489a0) at snmp_api.c:6124#18 0xb6ea5b14 in
> snmp_sess_read2 (sessp=sessp@entry=0xeb9a88, fdset=fdset@entry=0xbec489a0)
> at snmp_api.c:6397#19 0xb6ea5b44 in snmp_read2 (fdset=0xbec489a0) at
> snmp_api.c:5912#20 0x00012c0c in ?? ()*
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> *#0  __libc_do_syscall () at
> ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:47#1  0xb6e3d1b2 in
> __libc_signal_restore_set (set=0xbecc6320) at
> ../sysdeps/unix/sysv/linux/nptl-signals.h:79#2  __GI_raise
> (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:48#3  0xb6e3de3a in
> __GI_abort () at abort.c:89#4  0xb6e647da in __libc_message
> (do_abort=do_abort@entry=2, fmt=<optimized out>) at
> ../sysdeps/posix/libc_fatal.c:175#5  0xb6e68b28 in malloc_printerr
> (action=<optimized out>, str=0xb6ee4de4 "corrupted double-linked list",
> ptr=<optimized out>, ar_ptr=<optimized out>) at malloc.c:5087#6  0xb6e6b0d4
> in _int_malloc (av=av@entry=0xb6f017a4 <main_arena>, bytes=bytes@entry=12)
> at malloc.c:3743#7  0xb6e6c556 in __libc_calloc (n=<optimized out>,
> elem_size=<optimized out>) at malloc.c:3246#8  0xb6f9bcb8 in
> init_agent_snmp_session (session=0x59cac0, pdu=<optimized out>) at
> snmp_agent.c:1587#9  0xb6f9d368 in handle_snmp_packet (session=<optimized
> out>, pdu=<optimized out>, magic=0x0, reqid=<optimized out>, op=<optimized
> out>) at snmp_agent.c:2227#10 0xb6f203e4 in _sess_process_packet_handle_pdu
> (isp=0x59ca78, isp=0x59ca78, transport=0x59c888, pdu=0x5bfe88, sp=0x59cac0,
> sessp=<optimized out>) at snmp_api.c:5807#11 _sess_process_packet
> (sessp=sessp@entry=0x59ca60, sp=sp@entry=0x59cac0, isp=0x59ca78,
> transport=transport@entry=0x59c888, opaque=opaque@entry=0x5a1118,
> olength=olength@entry=60,     packetptr=0x5a20e0 "00\002\001", length=50)
> at snmp_api.c:5863#12 0xb6f20a3a in _sess_read (sessp=sessp@entry=0x59ca60,
> fdset=fdset@entry=0xbecc69a0) at snmp_api.c:6124#13 0xb6f20b14 in
> snmp_sess_read2 (sessp=sessp@entry=0x59ca60, fdset=fdset@entry=0xbecc69a0)
> at snmp_api.c:6397#14 0xb6f20b44 in snmp_read2 (fdset=0xbecc69a0) at
> snmp_api.c:5912#15 0x00012c0c in ?? ()Backtrace stopped: previous frame
> identical to this frame (corrupt stack?)*
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>
> eth0      Link encap:Ethernet  HWaddr 62:96:0C:F6:A0:28
>           inet addr:15.77.45.114  Bcast:15.77.47.255  Mask:255.255.252.0
>           inet6 addr: 2620:0:a02:e00d:6096:cff:fef6:a028/64 Scope:Global
>           inet6 addr: 2620:0:a02:e00e:7925:979f:3372:607e/128 Scope:Global
>           inet6 addr: fe80::6096:cff:fef6:a028/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:108792 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:5110 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:121134374 (115.5 MiB)  TX bytes:5412555 (5.1 MiB)
>           Interrupt:42
>
> lo        Link encap:Local Loopback
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           inet6 addr: ::1/128 Scope:Host
>           UP LOOPBACK RUNNING  MTU:65536  Metric:1
>           RX packets:2901 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:2901 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1
>           RX bytes:379572 (370.6 KiB)  TX bytes:379572 (370.6 KiB)
>
> wlan0     Link encap:Ethernet  HWaddr 10:5B:AD:A6:77:A4
>           inet addr:192.168.16.30  Bcast:192.168.16.255  Mask:255.255.255.0
>           inet6 addr: b706:6100:88e0:f21e:125b:adff:fea6:77a4/64
> Scope:Global
>           inet6 addr: 72e1:4617:c9d3:9f78:125b:adff:fea6:77a4/64
> Scope:Global
>           inet6 addr: fe80::125b:adff:fea6:77a4/64 Scope:Link
>           inet6 addr: 3e4:4137:147c:5726:125b:adff:fea6:77a4/64
> Scope:Global
>           inet6 addr: b772:c829:5066:e75f:125b:adff:fea6:77a4/64
> Scope:Global
>           inet6 addr: 1616::69cc:7484:3980:a5af/128 Scope:Global
>           inet6 addr: b102:a15f:713b:c851:125b:adff:fea6:77a4/64
> Scope:Global
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:1223 errors:0 dropped:294 overruns:0 frame:0
>           TX packets:382 errors:0 dropped:2 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:219993 (214.8 KiB)  TX bytes:152626 (149.0 KiB)
>

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