[OpenSIPS-Users] segmentation fault when calling pkg_malloc

[Sergio Gutierrez]

Hello Chevio.

Just to be sure, perform the corresponding casts when assgining. For example

...

       strsql=(char*)pkg_malloc(100);

After calling pkg_malloc, you should evaluate the return value; it returns
NULL if memory allocation could not be performed. That would be a way to
determine whether you exhausted memory.

Best regards.

Sergio.

On Wed, Mar 11, 2009 at 5:10 PM, Chevio <emercado at rapidlink.com> wrote:

>
> Hi, All,
>
> I am getting a segmentation fault when calling pkg_malloc from a custom
> module in opensips 1.4.4 notls,
>
> here is the offending code :
>
> int tncgw_ip_lookup(struct sip_msg* msg, char* _para1, char* _para2)
> {
>
>        str  _user_ip;
>        db_res_t* db_res = NULL;
>        char* strsql=NULL;
>        char* to_prefix=NULL;
>        char* new_uri=NULL;
>        char* new_to=NULL;
>        str strsqlstr;
>        str techprefix;
>        str to;
>        int retval=-1;
>        int dbg=1;
>
>        if(dbg)LM_INFO("TNCGW ip_address_lookup 2009.03.11.a beta\n");
>
>        techprefix.s=NULL;
>        _user_ip.s=NULL;
>
>        if(dbg) LM_INFO("---Memory allocation\n");
>
>        strsql=pkg_malloc(100);
>        new_to=pkg_malloc(MAX_URI_SIZE); ## this is the line 97
>        new_uri=pkg_malloc(MAX_URI_SIZE);
>        to_prefix=pkg_malloc(8);
>
>
> and here is the  back trace
>
> Program terminated with signal 11, Segmentation fault.
> [New process 32735]
> #0  fm_malloc (qm=0x8183b00, size=<value optimized out>) at
> mem/f_malloc.c:125
> 125                             if (frag->size <= (*f)->size) break;
> (gdb) bt
> #0  fm_malloc (qm=0x8183b00, size=<value optimized out>) at
> mem/f_malloc.c:125
> #1  0xb7ab0873 in tncgw_ip_lookup (msg=0x8196ed8, _para1=0x0, _para2=0x0)
> at
> tncgw.c:97
> #2  0x08055275 in do_action (a=0x818d278, msg=0x8196ed8) at action.c:845
> #3  0x08054172 in run_action_list (a=0x818d278, msg=0x8196ed8) at
> action.c:138
> #4  0x080a0516 in eval_expr (e=0x818d2e0, msg=0x8196ed8, val=0xbf8d4ef8) at
> route.c:1133
> #5  0x08053e2f in do_assign (msg=0x8196ed8, a=0x818d308) at action.c:207
> #6  0x080549f5 in do_action (a=0x818d308, msg=0x8196ed8) at action.c:951
> #7  0x08054172 in run_action_list (a=0x818d308, msg=0x8196ed8) at
> action.c:138
> #8  0x08056845 in do_action (a=0x818d8c0, msg=0x8196ed8) at action.c:717
> #9  0x08054172 in run_action_list (a=0x8189fd0, msg=0x8196ed8) at
> action.c:138
> #10 0x080577f4 in run_top_route (a=0x8189fd0, msg=0x8196ed8) at
> action.c:118
>
> does it mean I ran out of memory? if that is the case pkg_malloc should
> return a 0 instead of crashing.
>
> I will appreciate any help.
>
> Chevio
> --
> View this message in context:
> http://n2.nabble.com/segmentation-fault-when-calling-pkg_malloc-tp2463853p2463853.html
> Sent from the OpenSIPS - Users mailing list archive at Nabble.com.
>
>
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>



-- 
Sergio Gutiérrez
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