Address 0xfffffffe out of bounds why and how to solve.MyConfbridgeCount(conferencenumber,variablename )return total number of user in conference given by conferencenumber otherwise zero.At runtime using MyConfbridgeCount(4000,count ).now app2: MyConfbridgeCount will call function count_exec(struct ast_channel *chan, const char *data).But at compile time char * data cause core dumped. Asterisk-11.5.1 CentOS6
app_confbrige.c confbridge.conf
====================================================Task: Using Dailplan user want to retrive no of user in conference
‘6050’ => 1. Verbose(3,”testMyConfbridgeCount”) [pbx_config] 2. MyConfbridgeCount(4000,count) [pbx_config] 3. verbose(3,”== ${count} ====”)
[pbx_config]

issue:Currently asterisk core dumped as soon as app2 load .
file: app/app_confbrige.c
==================================================================== partial code of app_confbridge.c:
=================================================================== static const char *const app2 =”MyConfbridgeCount”;

static int load_module(void)
{
ast_verb(3 ,”==Inside load_module==”);
ast_verb(3 ,”\n ==Inside load_module==\n “);
ast_log(LOG_NOTICE ,”\n ==Inside load_module==\n “);

//tes4
//const char *data= (char*)malloc(sizeof(char) * 256);
char *sdata=”4000,acPd”;
ast_verb(3 ,”\n ==Inside load_module sdata [%s] at [%p]
len[%d]\n “,sdata,&sdata,strlen(sdata));
ast_log(LOG_NOTICE ,”\n ==Inside load_module sdata [%s] at [%p]
and len[%d]\n “,sdata,&sdata,strlen(sdata));

char *data= malloc(sizeof(char) * 256);
data=ast_strdupa(sdata);
ast_verb(3 ,”\n ==Inside load_module data is [%s] at [%p]
len[%d]\n “,data,&data,strlen(data));

ast_log(LOG_NOTICE ,”\n ==Inside load_module data is [%s] at
[%p] and len[%d]\n “,data,&data,strlen(data));

ast_verb(3 ,”\n==Inside load_module data malloc == \n” );
ast_log(LOG_NOTICE,”\n==Inside load_module data malloc == \n”
);

res |= ast_register_application_xml(app2,count_exec);
return res;
}
static int unload_module(void)
{

res |= ast_unregister_application(app2);
return res;
}

static struct ast_cli_entry cli_confbridge[] = {
AST_CLI_DEFINE(count_exec, “MyConfbrigdeCount Show Number of adminUser(s) in Conference.” ),
}

static int count_exec(struct ast_channel *chan, const char *data)
{
int res = 0;
struct conference_bridge *conf=NULL;
int count;
char *localdata;
char val[80] = “0”;

struct ao2_iterator i;
struct conference_bridge tmp;

AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(confno);
AST_APP_ARG(varname);
);

ast_verb(3,”\n============Inside count_exec =============\n”);

ast_verb(3,”\n = 0xfffffffe inside count_exec == data[%s] at add
:[%p] ,len:[%d] ====\n”,data,&data,strlen(data));

return res;
}
================================================================== (gdb) bt
#0 __strlen_sse2_bsf () at ../sysdeps/i386/i686/multiarch/strlen-sse2-
bsf.S:64
#1 0x00cefa49 in count_exec (chan=0xd09d78, data=0xfffffffe