Help with map server leak

[bWolfie 139]

I made this command to retrieve all of an item from storage.

 

This line char *item_name =(char *)aMalloc(ITEM_NAME_LENGTH*sizeof(char)); causes memory leak. How to fix it?

 

	struct item_data *i_data = itemdb->exists(nameid);

	if (i_data == NULL) {
		clif->message(fd, "Invalid Item ID.");
		return false;
	}

	char *item_name =(char *)aMalloc(ITEM_NAME_LENGTH*sizeof(char));
	memcpy(item_name, i_data->jname, ITEM_NAME_LENGTH);

	char output[100];
	sprintf(output, "Retrieved %d '%s' from storage.", i, item_name);

 

 

[Asheraf 123]

Either add a

aFree(item_name);

or better use a stack allocation instead of malloc

char item_name[ITEM_NAME_LENGTH];

 

[4144 366]

after sprintf, add

aFree(item_name);

and why memcpy? server may crash if name too short. probably better strncpy or safestrncpy

[bWolfie 139]

Thanks for the responses. I don't know why I use memcpy, not so advanced on coding. I just copied an existing structure I found in source code.

 

I used safestrncpy in new version and no leaks.

	char item_name[ITEM_NAME_LENGTH], output[100];
	safestrncpy(item_name, i_data->jname, ITEM_NAME_LENGTH);
	sprintf(output, "Retrieved %d '%s' from storage.", i, item_name);

 

Edited August 9, 2022 by bWolfie