Re: [PATCH] Btrfs-progs: fix closing of opendir()

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On Mon, Jul 15, 2013 at 07:36:50PM +0800, Wang Shilong wrote:
> valgrind complains open_file_or_dir() causes a memory leak.That is because
> if we open a directoy by opendir(), and then we should call closedir()
> to free memory.

I've reviewed this and don't see a better way how to fix the leaks now.
One comment below, otherwise ok, thanks.


> --- a/cmds-filesystem.c
> +++ b/cmds-filesystem.c
> @@ -91,9 +89,8 @@ static int cmd_df(int argc, char **argv)
>  	sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
>  			(count * sizeof(struct btrfs_ioctl_space_info)));
>  	if (!sargs) {
> -		close(fd);
> -		free(sargs_orig);
> -		return -ENOMEM;
> +		ret = -ENOMEM;
> +		goto out;

sargs_orig is leaked here, the out: block only frees sargs, but it's
null now, so

		sargs = sargs_orig;
		goto out;

should fix it.

>  	}
>  
>  	sargs->space_slots = count;
--
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