[sr-dev] [kamailio/kamailio] core on broken config (#2599)

[sergey-safarov]

### Description

I have created a broken config with construction
```
    if (is_request()) {
    }
```

When I try to check config I get the core

```
 0(66437) CRITICAL: <core> [core/cfg.y:3665]: yyerror_at(): parse error in config file proxy-media.cfg, line 18, column 5: syntax error
 0(66437) CRITICAL: <core> [core/cfg.y:3665]: yyerror_at(): parse error in config file proxy-media.cfg, line 18, column 5: bad command
 0(66437) CRITICAL: <core> [core/cfg.y:3662]: yyerror_at(): parse error in config file proxy-media.cfg, line 20, column 5-6: 
ERROR: bad config file (3 errors) (parsing code: 1)
 0(66437) ERROR: <core> [core/ppcfg.c:243]: pp_ifdef_level_error(): different number of preprocessor directives: 1 more #!if[n]def as #!endif
 0(66437) INFO: <core> [core/sctp_core.c:53]: sctp_core_destroy(): SCTP API not initialized

Program received signal SIGSEGV, Segmentation fault.
0x00007fffee8589ca in BN_clear_free () from /lib64/libcrypto.so.1.1
Missing separate debuginfos, use: yum debuginfo-install brotli-1.0.6-2.el8.x86_64 cyrus-sasl-lib-2.1.27-5.el8.x86_64 hiredis-0.13.3-13.el8.x86_64 jansson-2.11-3.el8.x86_64 keyutils-libs-1.5.10-6.el8.x86_64 krb5-libs-1.18.2-5.el8.x86_64 libcom_err-1.45.6-1.el8.x86_64 libcurl-7.61.1-14.el8.x86_64 libidn2-2.2.0-1.el8.x86_64 libnghttp2-1.33.0-3.el8_2.1.x86_64 libpsl-0.20.2-6.el8.x86_64 libselinux-2.9-4.el8_3.x86_64 libssh-0.9.4-2.el8.x86_64 libunistring-0.9.9-3.el8.x86_64 libxcrypt-4.1.1-4.el8.x86_64 libxml2-2.9.7-8.el8.x86_64 openldap-2.4.46-15.el8.x86_64 openssl-libs-1.1.1g-11.el8.x86_64 pcre2-10.32-2.el8.x86_64 xz-libs-5.2.4-3.el8.x86_64 zlib-1.2.11-16.el8_2.x86_64
(gdb) bt full
#0  0x00007fffee8589ca in BN_clear_free () from /lib64/libcrypto.so.1.1
No symbol table info available.
#1  0x00007fffecec5825 in ssh_dh_finalize.part () from /lib64/libssh.so.4
No symbol table info available.
#2  0x00007fffeceb6e4d in libssh_destructor () from /lib64/libssh.so.4
No symbol table info available.
#3  0x00007ffff7de4386 in _dl_fini () from /lib64/ld-linux-x86-64.so.2
No symbol table info available.
#4  0x00007ffff708df8c in __run_exit_handlers () from /lib64/libc.so.6
No symbol table info available.
#5  0x00007ffff708e0c0 in exit () from /lib64/libc.so.6
No symbol table info available.
#6  0x00007ffff70777ba in __libc_start_main () from /lib64/libc.so.6
No symbol table info available.
#7  0x000000000041c39e in _start ()
No symbol table info available.
(gdb) 
```
On host installed 
```
[root at bcf-a0 config]# rpm -qf /lib64/libcrypto.so.1.1
openssl-libs-1.1.1g-11.el8.x86_64
```
### Additional Information

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

```
[root at bcf-a0 config]# kamailio -v
version: kamailio 5.5.0-dev3 (x86_64/linux) aff06f
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, 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_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
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: aff06f 
compiled on 04:01:30 Jan  7 2021 with gcc 8.3.1
```

* **Operating System**:

```
[root at host ~]# cat /etc/os-release 
NAME="CentOS Linux"
VERSION="8"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Linux 8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-8"
CENTOS_MANTISBT_PROJECT_VERSION="8"
```


-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/kamailio/kamailio/issues/2599
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-dev/attachments/20210107/4a0c1a86/attachment-0001.htm>