Potential leak of memory pointed to by 'machine'，leakpointed

Potential leak of memory pointed to by 'machine'，leakpointed

Potential leak of memory pointed to by 'machine'

NSString* zipPath=[NSStringstringWithFormat:@"{TIME=%@",[selfgetChuo_time]];size_tsize;
    sysctlbyname("hw.machine",NULL, &size,NULL,0);
    char *machine = (char*)malloc(size);
    sysctlbyname("hw.machine", machine, &size,NULL,0);
    NSString *platform = [NSStringstringWithCString:machineencoding:NSUTF8StringEncoding];//手機型號    free(machine);

malloc  和  free是必須配對兒使用的。要不就是記憶體流失