[lvm-devel] [PATCH] fix allocation handle memory pool leak in mirror code

[Petr Rockai]

> Signed-off-by: Milan Broz <mbroz at redhat.com>
Acked-By: Petr Ročkai <prockai at redhat.com>

> diff --git a/lib/metadata/lv_manip.c b/lib/metadata/lv_manip.c
> index 991d63c..ec9e19e 100644
> --- a/lib/metadata/lv_manip.c
> +++ b/lib/metadata/lv_manip.c
> @@ -1608,16 +1608,12 @@ int lv_extend(struct logical_volume *lv,
>  				    extents, allocatable_pvs, alloc, NULL)))
>  		return_0;
>  
> -	if (mirrors < 2) {
> -		if (!lv_add_segment(ah, 0, ah->area_count, lv, segtype, stripe_size,
> -			    status, 0, NULL))
> -			goto_out;
> -	} else {
> -		if (!_lv_extend_mirror(ah, lv, extents, 0))
> -			return_0;
> -	}
> +	if (mirrors < 2)
> +		r = lv_add_segment(ah, 0, ah->area_count, lv, segtype,
> +				   stripe_size, status, 0, NULL);
> +	else
> +		r = _lv_extend_mirror(ah, lv, extents, 0);
>  
> -      out:
>  	alloc_destroy(ah);
>  	return r;
>  }
Check.

> diff --git a/lib/metadata/mirror.c b/lib/metadata/mirror.c
> index c7f16df..b98892b 100644
> --- a/lib/metadata/mirror.c
> +++ b/lib/metadata/mirror.c
> @@ -1160,6 +1160,7 @@ int add_mirrors_to_segments(struct cmd_context *cmd, struct logical_volume *lv,
>  	const struct segment_type *segtype;
>  	struct dm_list *parallel_areas;
>  	uint32_t adjusted_region_size;
> +	int r = 1;
>  
>  	if (!(parallel_areas = build_parallel_areas_from_lv(cmd, lv)))
>  		return_0;
> @@ -1180,10 +1181,11 @@ int add_mirrors_to_segments(struct cmd_context *cmd, struct logical_volume *lv,
>  
>  	if (!lv_add_mirror_areas(ah, lv, 0, adjusted_region_size)) {
>  		log_error("Failed to add mirror areas to %s", lv->name);
> -		return 0;
> +		r = 0;
>  	}
>  
> -	return 1;
> +	alloc_destroy(ah);
> +	return r;
>  }
Check.

>  /*
> @@ -1349,6 +1351,7 @@ int add_mirror_log(struct cmd_context *cmd, struct logical_volume *lv,
>  	int in_sync;
>  	struct logical_volume *log_lv;
>  	struct lvinfo info;
> +	int r = 0;
>  
>  	/* Unimplemented features */
>  	if (log_count > 1) {
> @@ -1404,13 +1407,15 @@ int add_mirror_log(struct cmd_context *cmd, struct logical_volume *lv,
>  
>  	if (!(log_lv = _set_up_mirror_log(cmd, ah, lv, log_count,
>  					  region_size, alloc, in_sync)))
> -		return_0;
> +		goto_out;
>  
>  	if (!attach_mirror_log(first_seg(lv), log_lv))
> -		return_0;
> +		goto_out;
>  
> +	r = 1;
> +out:
>  	alloc_destroy(ah);
> -	return 1;
> +	return r;
>  }
Check.

>  /*
> @@ -1455,8 +1460,10 @@ int add_mirror_images(struct cmd_context *cmd, struct logical_volume *lv,
>  	 */
>  	if (log_count &&
>  	    !(log_lv = _set_up_mirror_log(cmd, ah, lv, log_count, region_size,
> -					  alloc, mirror_in_sync())))
> -		return_0;
> +					  alloc, mirror_in_sync()))) {
> +		stack;
> +		goto out_remove_imgs;
> +	}
>  
>  	/* The log initialization involves vg metadata commit.
>  	   So from here on, if failure occurs, the log must be explicitly
> @@ -1503,6 +1510,7 @@ int add_mirror_images(struct cmd_context *cmd, struct logical_volume *lv,
>  			  "abandoned log LV before retrying.");
>  
>    out_remove_imgs:
> +	alloc_destroy(ah);
>  	return 0;
>  }
Check.

-- 
Peter Rockai | me()mornfall!net | prockai()redhat!com
 http://blog.mornfall.net | http://web.mornfall.net

"In My Egotistical Opinion, most people's C programs should be
 indented six feet downward and covered with dirt."
     -- Blair P. Houghton on the subject of C program indentation