libdm: do not read region before checking dms for NULL (Coverity)

dm_stats_get_area_start() attempts to assign a region pointer from
a stats handle before checking it is non-NULL: move the assignment
after the test.

1 files changed, 2 insertions, 1 deletions

diff --git a/libdm/libdm-stats.c b/libdm/libdm-stats.c
index f8d0012e2..b7000cc80 100644
--- a/libdm/libdm-stats.c
+++ b/libdm/libdm-stats.c
@@ -1328,9 +1328,10 @@ int dm_stats_get_current_region_area_len(const struct dm_stats *dms,
 int dm_stats_get_area_start(const struct dm_stats *dms, uint64_t *start,
 			    uint64_t region_id, uint64_t area_id)
 {
-	struct dm_stats_region *region = &dms->regions[region_id];
+	struct dm_stats_region *region;
 	if (!dms || !dms->regions)
 		return_0;
+	region = &dms->regions[region_id];
 	*start = region->start + region->step * area_id;
 	return 1;
 }