[Snort-devel] Bus errors and segmentation faults after upgrade to 2.9.7.3 and daq 2.0.5

elof at ...969... elof at ...969...
Thu Jun 4 12:10:28 EDT 2015


So I just had a signal 6...

I assume I can't attach files to the mailing list, so here it is, directly 
in the mailbody. :-)





gdb /usr/local/bin/snort 11057

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This GDB was configured as "amd64-marcel-freebsd"...
Attaching to program: /usr/local/bin/snort, process 11057
Reading symbols from /usr/local/lib/libdnet.so.1...done.
Loaded symbols for /usr/local/lib/libdnet.so.1
Reading symbols from /usr/local/lib/libpcre.so.1...done.
Loaded symbols for /usr/local/lib/libpcre.so.1
Reading symbols from /lib/libm.so.5...done.
Loaded symbols for /lib/libm.so.5
Reading symbols from /lib/libcrypto.so.6...done.
Loaded symbols for /lib/libcrypto.so.6
Reading symbols from /lib/libpcap.so.8...done.
Loaded symbols for /lib/libpcap.so.8
Reading symbols from /usr/local/lib/libsfbpf.so.0...done.
Loaded symbols for /usr/local/lib/libsfbpf.so.0
Reading symbols from /lib/libz.so.6...done.
Loaded symbols for /lib/libz.so.6
Reading symbols from /usr/lib/liblzma.so.5...done.
Loaded symbols for /usr/lib/liblzma.so.5
Reading symbols from /lib/libthr.so.3...done.
[New Thread 815a59400 (LWP 100459/snort)]
[New Thread 802407400 (LWP 100375/snort)]
Loaded symbols for /lib/libthr.so.3
Reading symbols from /lib/libc.so.7...done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /usr/local/lib/snort_dynamicengine/libsf_engine.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicengine/libsf_engine.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_dce2_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_dce2_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_dnp3_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_dnp3_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_dns_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_dns_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_ftptelnet_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_ftptelnet_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_gtp_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_gtp_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_imap_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_imap_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_modbus_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_modbus_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_pop_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_pop_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_reputation_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_reputation_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_sdf_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_sdf_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_sip_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_sip_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_ssh_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_ssh_preproc.so
Reading symbols from /usr/local/lib/snort_dynamicpreprocessor//libsf_ssl_preproc.so...done.
Loaded symbols for /usr/local/lib/snort_dynamicpreprocessor//libsf_ssl_preproc.so
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
[Switching to Thread 815a59400 (LWP 100459/snort)]
0x0000000801faa40c in nanosleep () from /lib/libc.so.7
(gdb) set logging file gdb-snort.txt
(gdb) set logging on
Copying output to gdb-snort.txt.
(gdb) continue
Continuing.



<...it has just been a few minutes when I receive a SIGABRT>



Program received signal SIGABRT, Aborted.
[Switching to Thread 802407400 (LWP 100375/snort)]
0x0000000801f2364c in thr_kill () from /lib/libc.so.7

(gdb) backtrace full
#0  0x0000000801f2364c in thr_kill () from /lib/libc.so.7
No symbol table info available.
#1  0x0000000801fc7c4b in abort () from /lib/libc.so.7
No symbol table info available.
#2  0x0000000801fab315 in __assert () from /lib/libc.so.7
No symbol table info available.
#3  0x0000000805068395 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
No symbol table info available.
#4  0x0000000805068781 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
No symbol table info available.
#5  0x000000080506afd0 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
No symbol table info available.
#6  0x000000080506b85b in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
No symbol table info available.
#7  0x000000080506c150 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
No symbol table info available.
#8  0x000000080506cb27 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
No symbol table info available.
#9  0x00000000004423f7 in DispatchPreprocessors (p=0x8033a3e00, policy_id=0, policy=0x802faa000) at detect.c:136
 	scb = (SessionControlBlock *) 0x8a1aad2f0
 	ppn = (PreprocEvalFuncNode *) 0x8033ff0a0
 	pps_enabled_foo = 1123336
 	alerts_processed = true
#10 0x000000000044286d in Preprocess (p=0x8033a3e00) at detect.c:234
 	retval = 0
 	policy_id = 0
 	policy = (SnortPolicy *) 0x802faa000
 	pktcnt = 0
 	snort_ticks_start = 34413886976
 	snort_ticks_end = 34413888664
#11 0x00000000004e44b8 in _flush_to_seq (tcpssn=0x80811ce50, st=0x80811cfa8, bytes=3644, p=0x8033a4900, sip=0x8033a51a4, dip=0x8033a51b8, sp=39946, dp=6400, dir=128) at snort_stream_tcp.c:4352
 	tmp_do_detect = 1
 	tmp_do_detect_content = 1
 	snort_ticks_start = 37073416192
 	snort_ticks_end = 37069258752
 	start_seq = 846966387
 	stop_seq = 1940818286
 	footprint = 3644
 	bytes_processed = 3644
 	flushed_bytes = 3644
 	pkth = {ts = {tv_sec = 100375, tv_usec = 0}, caplen = 0, pktlen = 0, ingress_index = -1, egress_index = -1, ingress_group = -1, egress_group = -1, flags = 0, opaque = 8, priv_ptr = 0x8a1800000, flow_id = 535241216, address_space_id = 0}
 	enc_flags = 2147483648
 	snort_ticks_start = 51544732022
 	snort_ticks_end = 113187
#12 0x00000000004e3e06 in flush_to_seq (tcpssn=0x80811ce50, st=0x80811cfa8, bytes=3644, p=0x8033a4900, sip=0x8033a51a4, dip=0x8033a51b8, sp=39946, dp=6400, dir=128) at snort_stream_tcp.c:4493
No locals.
#13 0x00000000004e4f8e in flush_ackd (tcpssn=0x80811ce50, st=0x80811cfa8, p=0x8033a4900, sip=0x8033a51a4, dip=0x8033a51b8, sp=39946, dp=6400, dir=128) at snort_stream_tcp.c:4559
 	bytes = 3644
#14 0x00000000004e3bcb in flush_stream (tcpssn=0x80811ce50, st=0x80811cfa8, p=0x8033a4900, sip=0x8033a51a4, dip=0x8033a51b8, sp=39946, dp=6400, dir=128) at snort_stream_tcp.c:4588
 	fm = (FlushMgr *) 0x80811cfb4
#15 0x00000000004e60b4 in FlushQueuedSegs (scb=0x8a1aad2f0, tcpssn=0x80811ce50) at snort_stream_tcp.c:5074
 	p = (Packet *) 0x8033a4900
 	flushed = 1926
 	tmp_pcap_hdr = {ts = {tv_sec = 1433431165, tv_usec = 321125}, caplen = 94, pktlen = 94, ingress_index = 5004089, egress_index = 0, ingress_group = 38246208, egress_group = 8, flags = 4294960320, opaque = 32767, priv_ptr = 0x4b4c81, flow_id = 0, address_space_id = 0}
#16 0x00000000004e61bd in TcpSessionCleanup (scb=0x8a1aad2f0, freeApplicationData=1) at snort_stream_tcp.c:5115
 	tcpssn = (TcpSession *) 0x80811ce50
#17 0x00000000004e61ea in TcpSessionCleanupWithFreeApplicationData (scb=0x8a1aad2f0) at snort_stream_tcp.c:5122
No locals.
#18 0x00000000004e69e1 in StreamProcessTcp (p=0xee2a40, scb=0x8a1aad2f0, s5TcpPolicy=0x812807000, skey=0x7fffffffe6c0) at snort_stream_tcp.c:5648
 	sscc = {old_mem_in_use = 15788887, client_ip = {family = 2, bits = 32, ip = {u6_addr8 = "\nm\027L", '\0' <repeats 11 times>, u6_addr16 = {27914, 19479, 0, 0, 0, 0, 0, 0}, u6_addr32 = {1276603658, 0, 0, 0}}}, server_ip = {family = 2, bits = 32, ip = {u6_addr8 = "\nm\026\024", '\0' <repeats 11 times>,
       u6_addr16 = {27914, 5142, 0, 0, 0, 0, 0, 0}, u6_addr32 = {337014026, 0, 0, 0}}}, client_port = 39946, server_port = 6400, lw_session_state = 200, lw_session_flags = 4284679, app_proto_id = 0}
 	tdb = {seq = 1940818286, ack = 2349672268, win = 64032, end_seq = 1940818325, ts = 0}
 	rc = 0
 	status = 4512282
 	snort_ticks_start = 34397587520
 	snort_ticks_end = 140737488348864
#19 0x00000000004b5a14 in StreamProcess (p=0xee2a40, context=0x0) at spp_stream6.c:751
 	key = {ip_l = {0, 0, 4216431, 0}, ip_h = {0, 2, 362856224, 8}, port_l = 59136, port_h = 65535, vlan_tag = 32767, protocol = 0 '\0', pad = 0 '\0', mplsLabel = 5328944, addressSpaceId = 0, addressSpaceIdPad1 = 0}
 	scb = (SessionControlBlock *) 0x8a1aad2f0
 	snort_ticks_start = 140737488348960
 	snort_ticks_end = 34722594592
#20 0x00000000004423f7 in DispatchPreprocessors (p=0xee2a40, policy_id=0, policy=0x802faa000) at detect.c:136
 	scb = (SessionControlBlock *) 0x8a1aad2f0
 	ppn = (PreprocEvalFuncNode *) 0x815b61340
 	pps_enabled_foo = 1123336
 	alerts_processed = true
#21 0x000000000044286d in Preprocess (p=0xee2a40) at detect.c:234
 	retval = 0
 	policy_id = 0
 	policy = (SnortPolicy *) 0x802faa000
 	pktcnt = 0
 	snort_ticks_start = 0
 	snort_ticks_end = 6059431713369489410
#22 0x00000000004351b3 in ProcessPacket (p=0xee2a40, pkthdr=0x7fffffffe8c0, pkt=0x82251deaa "\220?"\b?, ft=0x0) at snort.c:1873
 	verdict = DAQ_VERDICT_PASS
 	__func__ = "ProcessPacket"
#23 0x0000000000434ccd in PacketCallback (user=0x0, pkthdr=0x7fffffffe8c0, pkt=0x82251deaa "\220?"\b?) at snort.c:1718
 	inject = 0
 	verdict = DAQ_VERDICT_PASS
 	snort_ticks_start = 34894979584
 	snort_ticks_end = 34367935488
#24 0x000000000052fe34 in pcap_process_loop ()
No symbol table info available.
#25 0x0000000801429dcd in pcap_create_interface () from /lib/libpcap.so.8
No symbol table info available.
#26 0x000000000053025f in pcap_daq_acquire ()
No symbol table info available.
#27 0x000000000045a1b4 in DAQ_Acquire (max=0, callback=0x434b40 <PacketCallback>, user=0x0) at sfdaq.c:541
 	err = 0
#28 0x0000000000437616 in PacketLoop () at snort.c:3268
 	error = 0
 	pkts_to_read = 0
#29 0x00000000004337c7 in SnortMain (argc=6, argv=0x7fffffffebc0) at snort.c:921
 	tmp_ptr = 0x0
 	intf = 0x8024c4540 "mon0"
 	daqInit = 1
#30 0x000000000043364f in main (argc=6, argv=0x7fffffffebc0) at snort.c:817
No locals.
rax            0x0	0
rbx            0x7fffffffddec	140737488346604
rcx            0x801fc8fbc	34393067452
rdx            0x0	0
rsi            0x6	6
rdi            0x18817	100375
rbp            0x7fffffffde60	0x7fffffffde60
rsp            0x7fffffffddd8	0x7fffffffddd8
r8             0x0	0
r9             0xfffffe0032ea54a8	-2198169037656
r10            0x59	89
r11            0x202	514
r12            0x80811ce50	34495123024
r13            0x8033a51b8	34413892024
r14            0x82251deaa	34935529130
r15            0x1ba24	113188
rip            0x801f2364c	0x801f2364c <thr_kill+12>
eflags         0x206	518
cs             0x43	67
ss             0x3b	59
ds             0x0	0
es             0x0	0
fs             0x0	0
gs             0x0	0
0x801f2364c <thr_kill+12>:	jb     0x801f2364f <thr_kill+15>
0x801f2364e <thr_kill+14>:	retq 
0x801f2364f <thr_kill+15>:	mov    0x2d6bea(%rip),%rcx        # 0x8021fa240 <__nsdefaultsrc+5696>
0x801f23656 <thr_kill+22>:	jmpq   *%rcx
0x801f23658 <thr_kill+24>:	nop 
0x801f23659 <thr_kill+25>:	nop 
0x801f2365a <thr_kill+26>:	nop 
0x801f2365b <thr_kill+27>:	nop 
0x801f2365c <thr_kill+28>:	nop 
0x801f2365d <thr_kill+29>:	nop 
0x801f2365e <thr_kill+30>:	nop 
0x801f2365f <thr_kill+31>:	nop 
0x801f23660 <thr_self>:	mov    $0x1b0,%rax
0x801f23667 <thr_self+7>:	mov    %rcx,%r10
0x801f2366a <thr_self+10>:	syscall 
0x801f2366c <thr_self+12>:	jb     0x801f2366f <thr_self+15>

Thread 2 (Thread 802407400 (LWP 100375/snort)):
#0  0x0000000801f2364c in thr_kill () from /lib/libc.so.7
#1  0x0000000801fc7c4b in abort () from /lib/libc.so.7
#2  0x0000000801fab315 in __assert () from /lib/libc.so.7
#3  0x0000000805068395 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
#4  0x0000000805068781 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
#5  0x000000080506afd0 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
#6  0x000000080506b85b in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
#7  0x000000080506c150 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
#8  0x000000080506cb27 in ?? () from /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so
#9  0x00000000004423f7 in DispatchPreprocessors (p=0x8033a3e00, policy_id=0, policy=0x802faa000) at detect.c:136
#10 0x000000000044286d in Preprocess (p=0x8033a3e00) at detect.c:234
#11 0x00000000004e44b8 in _flush_to_seq (tcpssn=0x80811ce50, st=0x80811cfa8, bytes=3644, p=0x8033a4900, sip=0x8033a51a4, dip=0x8033a51b8, sp=39946, dp=6400, dir=128) at snort_stream_tcp.c:4352
#12 0x00000000004e3e06 in flush_to_seq (tcpssn=0x80811ce50, st=0x80811cfa8, bytes=3644, p=0x8033a4900, sip=0x8033a51a4, dip=0x8033a51b8, sp=39946, dp=6400, dir=128) at snort_stream_tcp.c:4493
#13 0x00000000004e4f8e in flush_ackd (tcpssn=0x80811ce50, st=0x80811cfa8, p=0x8033a4900, sip=0x8033a51a4, dip=0x8033a51b8, sp=39946, dp=6400, dir=128) at snort_stream_tcp.c:4559
#14 0x00000000004e3bcb in flush_stream (tcpssn=0x80811ce50, st=0x80811cfa8, p=0x8033a4900, sip=0x8033a51a4, dip=0x8033a51b8, sp=39946, dp=6400, dir=128) at snort_stream_tcp.c:4588
#15 0x00000000004e60b4 in FlushQueuedSegs (scb=0x8a1aad2f0, tcpssn=0x80811ce50) at snort_stream_tcp.c:5074
#16 0x00000000004e61bd in TcpSessionCleanup (scb=0x8a1aad2f0, freeApplicationData=1) at snort_stream_tcp.c:5115
#17 0x00000000004e61ea in TcpSessionCleanupWithFreeApplicationData (scb=0x8a1aad2f0) at snort_stream_tcp.c:5122
#18 0x00000000004e69e1 in StreamProcessTcp (p=0xee2a40, scb=0x8a1aad2f0, s5TcpPolicy=0x812807000, skey=0x7fffffffe6c0) at snort_stream_tcp.c:5648
#19 0x00000000004b5a14 in StreamProcess (p=0xee2a40, context=0x0) at spp_stream6.c:751
#20 0x00000000004423f7 in DispatchPreprocessors (p=0xee2a40, policy_id=0, policy=0x802faa000) at detect.c:136
#21 0x000000000044286d in Preprocess (p=0xee2a40) at detect.c:234
#22 0x00000000004351b3 in ProcessPacket (p=0xee2a40, pkthdr=0x7fffffffe8c0, pkt=0x82251deaa "\220?"\b?, ft=0x0) at snort.c:1873
#23 0x0000000000434ccd in PacketCallback (user=0x0, pkthdr=0x7fffffffe8c0, pkt=0x82251deaa "\220?"\b?) at snort.c:1718
#24 0x000000000052fe34 in pcap_process_loop ()
#25 0x0000000801429dcd in pcap_create_interface () from /lib/libpcap.so.8
#26 0x000000000053025f in pcap_daq_acquire ()
#27 0x000000000045a1b4 in DAQ_Acquire (max=0, callback=0x434b40 <PacketCallback>, user=0x0) at sfdaq.c:541
#28 0x0000000000437616 in PacketLoop () at snort.c:3268
#29 0x00000000004337c7 in SnortMain (argc=6, argv=0x7fffffffebc0) at snort.c:921
#30 0x000000000043364f in main (argc=6, argv=0x7fffffffebc0) at snort.c:817

Thread 1 (Thread 815a59400 (LWP 100459/snort)):
#0  0x0000000801faa40c in nanosleep () from /lib/libc.so.7
#1  0x0000000801f15a58 in sleep () from /lib/libc.so.7
#2  0x0000000801ca8078 in sleep () from /lib/libthr.so.3
#3  0x000000000043b215 in ReloadConfigThread (data=0x0) at snort.c:5695
#4  0x0000000801ca5dc4 in pthread_getprio () from /lib/libthr.so.3
#5  0x0000000000000000 in ?? ()
#0  0x0000000801f2364c in thr_kill () from /lib/libc.so.7
The program is running.  Quit anyway (and detach it)? (y or n) Detaching from program: /usr/local/bin/snort, process 11057




As gdb detached from snort, I got the signal 6 in my syslog:
2015-06-04 17:51:53 +02:00 foobar kernel: pid 11057 (snort), uid 100: exited on signal 6





So, this time we got a signal 6 but during this sensor's 14 hour uptime we've seen:
pid 1199 (snort), uid 100: exited on signal 10
pid 4503 (snort), uid 100: exited on signal 10
pid 5908 (snort), uid 100: exited on signal 10
pid 11057 (snort), uid 100: exited on signal 6





I hope this gdb was helpful.
Let me know if it should be run again.





This was all performed on a sensor running:

    ,,_     -*> Snort! <*-
   o"  )~   Version 2.9.7.3 (Build 217)
    ''''    By Martin Roesch & The Snort Team: http://www.snort.org/contact#team
            Copyright (C) 2014-2015 Cisco and/or its affiliates. All rights reserved.
            Copyright (C) 1998-2013 Sourcefire, Inc., et al.
            Using libpcap version 1.4.0
            Using PCRE version: 8.37 2015-04-28
            Using ZLIB version: 1.2.8


daq-2.0.5

FreeBSD 9.3-RELEASE-p13


/Elof





On Thu, 4 Jun 2015, Hui Cao (huica) wrote:

> That¹s cool. All looks good to me. No need to do more things...
>
> Best,
> Hui
>
> On 6/4/15, 11:35 AM, "elof at ...969..." <elof at ...969...> wrote:
>
>>
>> Hi Hui.
>>
>> That much I know. It is the debugging steps I'm curious about.
>>
>> (I think you forgot one important first command: continue )
>>
>>
>> Is this a good start:
>>
>> gdb /path/to/snort 1222
>> (gdb) set logging file gdb-snort.txt
>> (gdb) set logging on
>> (gdb) continue
>>
>> <wait for it to crash>
>>
>> (gdb) backtrace full
>> (gdb) info registers
>> (gdb) x/16i $pc
>> (gdb) thread apply all backtrace
>> (gdb) quit
>>
>> Email the report.
>>
>>
>> Should I prepare more stuff before the 'continue'?
>> Like "handle SIG33 pass nostop noprint" or something?
>>
>> /Elof
>>
>>
>> On Thu, 4 Jun 2015, Hui Cao (huica) wrote:
>>
>>> Try
>>>
>>> Assume snort pid is 1222
>>>
>>> gdb /path/to/snort 1222
>>>
>>> Best,
>>> Hui.
>>> On 6/4/15, 10:37 AM, "elof at ...969..." <elof at ...969...> wrote:
>>>
>>>>
>>>> An update:
>>>>
>>>> On a sensor where snort crashed with signal 6 three times, I downgraded
>>>> daq to 2.0.4_1 and rebooted the machine to rule out if the problem seem
>>>> to
>>>> be in 'snort' or 'daq'.
>>>>
>>>> With snort 2.9.7.3 and daq 2.0.4_1 I got signal 6 again.
>>>>
>>>>
>>>> This make me believe that there's something wrong in snort 2.9.7.3 and
>>>> not in daq 2.0.5.
>>>>
>>>>
>>>>
>>>> On this sensor I have now done the opposite, upgraded daq to 2.0.5 and
>>>> downgraded snort to 2.9.7.2 to see if I get any more signal 6.
>>>>
>>>> On another sensor, I'm running 2.9.7.3 (compiled with debug) and daq
>>>> 2.0.5
>>>> without chroot and uid/gid change, i.e. running as root, in order to
>>>> create a core file, if the problem happen again.
>>>> (if it doesn't happen on this sensor, I guess the problem lies
>>>> somewhere
>>>> in the chrooting code in snort. I know it has been updated between
>>>> 2.9.7.2
>>>> and 2.9.7.3)
>>>>
>>>>
>>>>
>>>> Russ C also wrote:
>>>>> Elof - since this is happening frequently, you could try attaching the
>>>>> debugger to one of your Snort processes and wait wait for segfault.
>>>>
>>>> I know too little about debugging. :-/ Can you give me instructions or
>>>> point me to a guide that describes the steps I should take?
>>>>
>>>>
>>>>
>>>> /Elof
>>>>
>>>>
>>>> On Thu, 4 Jun 2015, elof at ...969... wrote:
>>>>
>>>>>
>>>>> Five different sensors have now had bus errors (signal 10),
>>>>> segmentation
>>>>> faults (signal 11) and even signal 6 (SIGABRT).
>>>>>
>>>>> My snort config uses both chroot and dropping user privileges, so even
>>>>> if
>>>>> I start out as root with ulimit unlimited, this doesn't seem to be in
>>>>> effect
>>>>> after the chroot/uid-change.
>>>>>
>>>>> So currently I have no core-file to debug. :-/
>>>>>
>>>>> Anyone know how to set the ulimits for a chrooted and uid/gid-changed
>>>>> process in FreeBSD?
>>>>>
>>>>> /Elof
>>>>>
>>>>>
>>>>> On Thu, 4 Jun 2015, elof at ...969... wrote:
>>>>>
>>>>>>
>>>>>> Hi Hui!
>>>>>>
>>>>>> Yes, the dynamic engine/preproc files are updated as well.
>>>>>>
>>>>>> Last night the problem reocurred, so this seem to be reproduceable.
>>>>>> Good.
>>>>>> Then there's a good chance this problem can be sorted out.
>>>>>>
>>>>>>
>>>>>> A few minutes ago a signal 10 happened on another sensor (running
>>>>>> FreeBSD 10.1 amd64), so the problem must be in DAQ 2.0.5 or in Snort
>>>>>> 2.9.7.3 and not in the hardware nor in FreeBSD.
>>>>>>
>>>>>>
>>>>>> I will compile a debug-snort and try to generate core files.
>>>>>> I'll let you know the outcome next week.
>>>>>>
>>>>>> /Elof
>>>>>>
>>>>>>
>>>>>> On Wed, 3 Jun 2015, Hui cao wrote:
>>>>>>
>>>>>>> Hi Elof,
>>>>>>>
>>>>>>> Are snort and snort dynamic preprocessors are in sync?
>>>>>>>
>>>>>>> If so, can you help us get a backtrace from the crush? You need
>>>>>>> 1)  build snort with ./configure --enable-debug
>>>>>>> 2)  allowing core dump (ulimit -c unlimited)
>>>>>>> 3) run the snort
>>>>>>> 4) use "gdb snort core_file " and them type "bt" in the gdb command
>>>>>>> line
>>>>>>>
>>>>>>> Best,
>>>>>>> Hui.
>>>>>>>
>>>>>>>
>>>>>>> On 06/03/2015 05:51 AM, elof at ...969... wrote:
>>>>>>>> Hi all!
>>>>>>>>
>>>>>>>> This is just a report to inform that after I updated snort and DAQ
>>>>>>>> to the
>>>>>>>> latest versions, one of my sensors started throwing signal 10 (bus
>>>>>>>> error)
>>>>>>>> and signal 11 (segmentation fault).
>>>>>>>>
>>>>>>>> # uptime
>>>>>>>> 11:32AM  up 1 day,  9:48, 1 user, load averages: 0.36, 0.37, 0.38
>>>>>>>> # dmesg | grep snort
>>>>>>>> pid 1183 (snort), uid 100: exited on signal 11
>>>>>>>> pid 16920 (snort), uid 100: exited on signal 11
>>>>>>>> pid 17502 (snort), uid 100: exited on signal 11
>>>>>>>> pid 18862 (snort), uid 100: exited on signal 11
>>>>>>>> pid 20223 (snort), uid 100: exited on signal 11
>>>>>>>> pid 20927 (snort), uid 100: exited on signal 11
>>>>>>>> pid 1193 (snort), uid 100: exited on signal 11
>>>>>>>> pid 2447 (snort), uid 100: exited on signal 11
>>>>>>>> pid 3811 (snort), uid 100: exited on signal 10
>>>>>>>> pid 7881 (snort), uid 100: exited on signal 11
>>>>>>>> pid 9252 (snort), uid 100: exited on signal 10
>>>>>>>> pid 25593 (snort), uid 100: exited on signal 11
>>>>>>>> pid 26627 (snort), uid 100: exited on signal 11
>>>>>>>> pid 56658 (snort), uid 100: exited on signal 11
>>>>>>>> pid 57237 (snort), uid 100: exited on signal 10
>>>>>>>> pid 58595 (snort), uid 100: exited on signal 11
>>>>>>>> pid 68639 (snort), uid 100: exited on signal 11
>>>>>>>> pid 70008 (snort), uid 100: exited on signal 11
>>>>>>>> pid 71361 (snort), uid 100: exited on signal 10
>>>>>>>> pid 72725 (snort), uid 100: exited on signal 11
>>>>>>>>
>>>>>>>> 20 crashes in a day...
>>>>>>>> A reboot didn't help.
>>>>>>>>
>>>>>>>> This sensor has never behaved like this during its lifetime (1
>>>>>>>> year).
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> FreeBSD 9.3 amd64
>>>>>>>>
>>>>>>>>      ,,_     -*> Snort! <*-
>>>>>>>>     o"  )~   Version 2.9.7.3 (Build 217)
>>>>>>>>      ''''    By Martin Roesch & The Snort Team:
>>>>>>>> http://www.snort.org/contact#team
>>>>>>>>              Copyright (C) 2014-2015 Cisco and/or its affiliates.
>>>>>>>> All rights
>>>>>>>> reserved.
>>>>>>>>              Copyright (C) 1998-2013 Sourcefire, Inc., et al.
>>>>>>>>              Using libpcap version 1.4.0
>>>>>>>>              Using PCRE version: 8.37 2015-04-28
>>>>>>>>              Using ZLIB version: 1.2.8
>>>>>>>>
>>>>>>>> daq-2.0.5
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Bus errors are quite unusual in general, so I'll keep looking at
>>>>>>>> this,
>>>>>>>> trying to see if it is e.g. paging errors.
>>>>>>>> It doesn't look like it though:
>>>>>>>> # swapinfo
>>>>>>>> Device          1K-blocks     Used    Avail Capacity
>>>>>>>> /dev/mirror/swap   4194300        0  4194300     0%
>>>>>>>>
>>>>>>>> The machine doesn't seem to be overheated either:
>>>>>>>> System Temp:	30 degrees C
>>>>>>>> Peripheral Temp: 40 degrees C
>>>>>>>> CPU Temp: Low
>>>>>>>>
>>>>>>>>
>>>>>>>> If you need me to do something special to debug this further, let
>>>>>>>> me
>>>>>>>> know.
>>>>>>>>
>>>>>>>>
>>>>>>>> PS. It is only one sensor, out of 20, that behaves like this. So
>>>>>>>> perhaps
>>>>>>>> it is something in the mirrored traffic that make DAQ or snort
>>>>>>>> point
>>>>>>>> at
>>>>>>>> illegal memory addresses and crash.
>>>>>>>> Or this particular machine is having hardware issues. However, it
>>>>>>>> is
>>>>>>>> strange that those hw-issues should suddenly start right after I
>>>>>>>> updated
>>>>>>>> the software on the machine...
>>>>>>>>
>>>>>>>> When I write this, the current snort process has been alive for 5
>>>>>>>> hours.
>>>>>>>> It's going to be interesting to see if the traffic tonight will
>>>>>>>> cause it
>>>>>>>> to crash many times again.
>>>>>>>>
>>>>>>>> /Elof
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --------------------------------------------------------------------
>>>>>>>> --
>>>>>>>> --------
>>>>>>>> _______________________________________________
>>>>>>>> Snort-devel mailing list
>>>>>>>> Snort-devel at lists.sourceforge.net
>>>>>>>> https://lists.sourceforge.net/lists/listinfo/snort-devel
>>>>>>>> Archive:
>>>>>>>> http://sourceforge.net/mailarchive/forum.php?forum_name=snort-devel
>>>>>>>>
>>>>>>>> Please visit http://blog.snort.org for the latest news about Snort!
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ---------------------------------------------------------------------
>>>>>>> --
>>>>>>> -------
>>>>>>> _______________________________________________
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>>>>>>> https://lists.sourceforge.net/lists/listinfo/snort-devel
>>>>>>> Archive:
>>>>>>> http://sourceforge.net/mailarchive/forum.php?forum_name=snort-devel
>>>>>>>
>>>>>>> Please visit http://blog.snort.org for the latest news about Snort!
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ----------------------------------------------------------------------
>>>>>> --
>>>>>> ------
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>>>>>> https://lists.sourceforge.net/lists/listinfo/snort-devel
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>>>>>>
>>>>>> Please visit http://blog.snort.org for the latest news about Snort!
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> -----------------------------------------------------------------------
>>>>> --
>>>>> -----
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>>>>>
>>>>> Please visit http://blog.snort.org for the latest news about Snort!
>>>>>
>>>
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