13 Nov
2021
13 Nov
'21
6:50 p.m.
I have compiled Kamailio with ASAN
When I start Kamailio I this error
```
core/re.c:390:2: runtime error: null pointer passed as argument 2, which is declared to
never be null
```
[Link to code](https://github.com/kamailio/kamailio/blob/master/src/core/re.c#L390)
```
Breakpoint 1, replace_build (match=0xffffb0140fc0
"KZQ_CHECK_MEDIA_SERVER_INSERT", nmatch=1, pmatch=0xffffb01410a8,
se=0xffffb00b9bc0, msg=0x332ebe0 <_faked_msg>,
rpl=0xffffb0141120) at core/re.c:390
390 RBUF_APPEND(dest, p, end-p);
(gdb)
Continuing.
Breakpoint 1, replace_build (match=0xffffb0162a78
"auth_cache=>size=16;autoexpire=7200;REGISTRAR_S_WARM_CACHE", nmatch=1,
pmatch=0xffffb0162b60, se=0xffffb0162730,
msg=0x332ebe0 <_faked_msg>, rpl=0xffffb0162bd8) at core/re.c:390
390 RBUF_APPEND(dest, p, end-p);
(gdb) p p
$4 = 0x0
(gdb) list
385 default:
386 LM_CRIT("unknown type %d\n", se->replace[r].type);
387 /* ignore it */
388 }
389 }
390 RBUF_APPEND(dest, p, end-p);
391 rpl->len = dest - rbuf;
392 if ((rpl->s = pkg_malloc(rpl->len)) == NULL) {
393 PKG_MEM_ERROR;
394 goto error;
(gdb) bt
#0 replace_build (match=0xffffb0162a78
"auth_cache=>size=16;autoexpire=7200;REGISTRAR_S_WARM_CACHE", nmatch=1,
pmatch=0xffffb0162b60, se=0xffffb0162730,
msg=0x332ebe0 <_faked_msg>, rpl=0xffffb0162bd8) at core/re.c:390
#1 0x0000000000f91dc4 in subst_run (se=0xffffb0162730, input=0xffffb0162a78
"auth_cache=>size=16;autoexpire=7200;REGISTRAR_S_WARM_CACHE", msg=0x332ebe0
<_faked_msg>,
count=0x0) at core/re.c:460
#2 0x0000000000f926a0 in subst_str (input=0xffffb0162a78
"auth_cache=>size=16;autoexpire=7200;REGISTRAR_S_WARM_CACHE", msg=0x332ebe0
<_faked_msg>, se=0xffffb0162730,
count=0x0) at core/re.c:502
#3 0x00000000011e7d0c in pp_subst_run (data=0x338ba20 <s_buf>) at core/ppcfg.c:216
#4 0x00000000018b1f98 in yylex () at core/cfg.lex:1278
#5 0x0000000001900660 in yyparse () at core/cfg.tab.c:5160
#6 0x000000000048c4e4 in main (argc=11, argv=0xfffffffff3b8) at main.c:2487
```
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