Any help Address 0xfffffffe out of bounds asteisk-11.5.1

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");

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

[/b]

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 <Address 0xfffffffe out of bounds>) at app_confbridge.c:2438
#2 0x080d40eb in __ast_cli_register (e=0xd09d78, ed=0x0) at cli.c:2118
#3 0x080d4459 in ast_cli_register (e=0xd09d78) at cli.c:2178
#4 0x080d4482 in ast_cli_register_multiple (e=0xd09900, len=13) at cli.c:2189
#5 0x00cf8030 in load_module () at app_confbridge.c:4779
#6 0x0812ba89 in start_resource (mod=0x905e740) at loader.c:845
#7 0x0812c45c in load_resource_list (load_order=0xbfdbb8b0, global_symbols=0, mod_count=0xbfdbb8a8) at loader.c:1045
#8 0x0812ca5a in load_modules (preload_only=0) at loader.c:1198
#9 0x080895f7 in main (argc=4, argv=0xbfdbcdc4) at asterisk.c:4180
(gdb) frame 1
#1 0x00cefa49 in count_exec (chan=0xd09d78, data=0xfffffffe <Address 0xfffffffe out of bounds>) at app_confbridge.c:2438
2438 ast_verb(3,"\n = 0xfffffffe inside count_exec == data add :%p ,len:%d ====\n",&data,strlen(data));

thanks all user ,i changed in file app_confbridge.c (1)in func count_exect use ,&data in stand of data .(2) put comment in func static struct ast_cli_entry cli_confbridge[] //AST_CLI_DEFINE(count_exec, “SabseConfbridgeCount Show Number of User(s) in Conference.” ),
now no more crash core dumped .

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