[sr-dev] [kamailio/kamailio] Core generated by Kamailio when a bad char is found in header (#1687)

Joel Serrano notifications at github.com
Thu Oct 25 00:40:23 CEST 2018 

### Description

Kamailio dies complaining about a bad char in some header.  I can say that I just updated from the nightly-devel apt repo, this problem never happened in latest v5.1 release.

### Troubleshooting

#### Reproduction

I don't know how to reproduce yet.

#### Debugging Data

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[BT-FULL_core.kamailio.3329.1540415468.txt](https://github.com/kamailio/kamailio/files/2512570/BT-FULL_core.kamailio.3329.1540415468.txt)
[BT-FULL_core.kamailio.3330.1540415471.txt](https://github.com/kamailio/kamailio/files/2512571/BT-FULL_core.kamailio.3330.1540415471.txt)
[BT-FULL_core.kamailio.3331.1540415467.txt](https://github.com/kamailio/kamailio/files/2512572/BT-FULL_core.kamailio.3331.1540415467.txt)
[BT-FULL_core.kamailio.3333.1540415469.txt](https://github.com/kamailio/kamailio/files/2512573/BT-FULL_core.kamailio.3333.1540415469.txt)
[INFO-LOCALS_core.kamailio.3329.1540415468.txt](https://github.com/kamailio/kamailio/files/2512574/INFO-LOCALS_core.kamailio.3329.1540415468.txt)
[INFO-LOCALS_core.kamailio.3330.1540415471.txt](https://github.com/kamailio/kamailio/files/2512575/INFO-LOCALS_core.kamailio.3330.1540415471.txt)
[INFO-LOCALS_core.kamailio.3331.1540415467.txt](https://github.com/kamailio/kamailio/files/2512576/INFO-LOCALS_core.kamailio.3331.1540415467.txt)
[INFO-LOCALS_core.kamailio.3333.1540415469.txt](https://github.com/kamailio/kamailio/files/2512577/INFO-LOCALS_core.kamailio.3333.1540415469.txt)
[LIST_core.kamailio.3329.1540415468.txt](https://github.com/kamailio/kamailio/files/2512578/LIST_core.kamailio.3329.1540415468.txt)
[LIST_core.kamailio.3330.1540415471.txt](https://github.com/kamailio/kamailio/files/2512579/LIST_core.kamailio.3330.1540415471.txt)
[LIST_core.kamailio.3331.1540415467.txt](https://github.com/kamailio/kamailio/files/2512580/LIST_core.kamailio.3331.1540415467.txt)
[LIST_core.kamailio.3333.1540415469.txt](https://github.com/kamailio/kamailio/files/2512581/LIST_core.kamailio.3333.1540415469.txt)

#### Log Messages

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Check the syslog file and if there are relevant log messages printed by Kamailio, add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site).
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The relevant log lines are:

```
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/parse_addr_spec.c:718]: parse_addr_spec(): unexpected char [<] in status 6: ["910609864" <sip:;:929] .
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/msg_parser.c:164]: get_hdr_field(): bad to header
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/msg_parser.c:337]: parse_headers(): bad header field [To: "910609864" <sip:;:929<>64 at 138.99.136.3>;tag=as664d068c#015#012Call-ID: 032f010653fed9170365045a4e1002]
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/parse_addr_spec.c:718]: parse_addr_spec(): unexpected char [<] in status 6: ["910609864" <sip:;:929] .
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/msg_parser.c:164]: get_hdr_field(): bad to header
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/msg_parser.c:337]: parse_headers(): bad header field [To: "910609864" <sip:;:929<>64 at 138.99.136.3>;tag=as664d068c#015#012Call-ID: 032f010653fed9170365045a4e1002]
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/parse_addr_spec.c:718]: parse_addr_spec(): unexpected char [<] in status 6: ["910609864" <sip:;:929] .
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/msg_parser.c:164]: get_hdr_field(): bad to header
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/msg_parser.c:337]: parse_headers(): bad header field [To: "910609864" <sip:;:929<>64 at 138.99.136.3>;tag=as664d068c#015#012Call-ID: 032f010653fed9170365045a4e1002]
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: pv [pv_core.c:1892]: pv_get_hdr(): error parsing headers
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/parse_addr_spec.c:718]: parse_addr_spec(): unexpected char [<] in status 6: ["910609864" <sip:;:929] .
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/msg_parser.c:164]: get_hdr_field(): bad to header
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: <core> [core/parser/msg_parser.c:337]: parse_headers(): bad header field [To: "910609864" <sip:;:929<>64 at 138.99.136.3>;tag=as664d068c#015#012Call-ID: 032f010653fed9170365045a4e1002]
Oct 24 16:11:11 sbc01 sbc[3330]: ERROR: pv [pv_core.c:704]: pv_get_callid(): cannot parse Call-Id header
```

#### SIP Traffic

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If the issue is exposed by processing specific SIP messages, grab them with ngrep or save in a pcap file, then add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site).
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I have enabled a mirror server to capture all traffic, once the problem happens again I will be able to update this issue with SIP traffic.


### Possible Solutions

### Additional Information

  * **Kamailio Version** - output of `kamailio -v`

```
root at sbc01:/var/tmp# kamailio -v
version: kamailio 5.2.0-pre1 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144 MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled with gcc 6.3.0
root at sbc01:/var/tmp#
```

* **Operating System**:

<!--
Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...;
Kernel details (output of `uname -a`)
-->

```
root at sbc01:/var/tmp# uname -a
Linux sbc01.vozelia.com.pa 4.9.0-8-amd64 #1 SMP Debian 4.9.110-3+deb9u6 (2018-10-08) x86_64 GNU/Linux
root at sbc01:/var/tmp#

root at sbc01:/var/tmp# lsb_release -a
No LSB modules are available.
Distributor ID:	Debian
Description:	Debian GNU/Linux 9.5 (stretch)
Release:	9.5
Codename:	stretch
root at sbc01:/var/tmp#
```


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