diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index 41138760e..73707b63c 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.138 - 
 =====================================
+  Separate filemap extent allocation from region table.
   Fix segmentation fault when filemap region creation fails
   Fix performance of region cleanup for failed filemap creation.
   Fix very slow region deletion with many regions.
diff --git a/libdm/libdm-stats.c b/libdm/libdm-stats.c
index 34870e367..78b66ab40 100644
--- a/libdm/libdm-stats.c
+++ b/libdm/libdm-stats.c
@@ -4324,6 +4324,7 @@ static uint64_t *_stats_create_file_regions(struct dm_stats *dms, int fd,
 					    int precise, uint64_t *count)
 {
 	uint64_t *regions = NULL, i, max_region;
+	struct dm_pool *extent_mem = NULL;
 	struct _extent *extents = NULL;
 	char *hist_arg = NULL;
 	struct statfs fsbuf;
@@ -4357,9 +4358,19 @@ static uint64_t *_stats_create_file_regions(struct dm_stats *dms, int fd,
 		return 0;
 	}
 
-	if (!(extents = _stats_get_extents_for_file(dms->mem, fd, count)))
+	/* Use a temporary, private pool for the extent table. This avoids
+         * hijacking the dms->mem (region table) pool which would lead to
+         * interleaving temporary allocations with dm_stats_list() data,
+         * causing complications in the error path.
+         */
+	if (!(extent_mem = dm_pool_create("extents", sizeof(*extents))))
 		return_0;
 
+	if (!(extents = _stats_get_extents_for_file(extent_mem, fd, count))) {
+		dm_pool_destroy(extent_mem);
+		return_0;
+	}
+
         if (bounds) {
                 /* _build_histogram_arg enables precise if vals < 1ms. */
                 if (!(hist_arg = _build_histogram_arg(bounds, &precise)))
@@ -4386,7 +4397,8 @@ static uint64_t *_stats_create_file_regions(struct dm_stats *dms, int fd,
 
 	if (bounds)
 		dm_free(hist_arg);
-	dm_pool_free(dms->mem, extents);
+	dm_pool_free(extent_mem, extents);
+	dm_pool_destroy(extent_mem);
 	return regions;
 
 out_remove:
@@ -4407,7 +4419,8 @@ out_remove:
 	*count = 0;
 
 out:
-	dm_pool_free(dms->mem, extents);
+	dm_pool_free(extent_mem, extents);
+	dm_pool_destroy(extent_mem);
 	dm_free(hist_arg);
 	dm_free(regions);
 	return NULL;