diff --git a/include/linux/damon.h b/include/linux/damon.h
index 6f7edb3590ef..888570f55b41 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -1065,9 +1065,13 @@ static inline bool damon_target_has_pid(const struct damon_ctx *ctx)
 
 static inline unsigned int damon_max_nr_accesses(const struct damon_attrs *attrs)
 {
-	/* {aggr,sample}_interval are unsigned long, hence could overflow */
-	return min(attrs->aggr_interval / attrs->sample_interval,
+	unsigned long sample_interval;
+	unsigned long max_nr_accesses;
+
+	sample_interval = attrs->sample_interval ? : 1;
+	max_nr_accesses = min(attrs->aggr_interval / sample_interval,
 			(unsigned long)UINT_MAX);
+	return max_nr_accesses ? : 1;
 }
 
 
diff --git a/mm/damon/ops-common.c b/mm/damon/ops-common.c
index 5c93ef2bb8a9..d1842e2b00ef 100644
--- a/mm/damon/ops-common.c
+++ b/mm/damon/ops-common.c
@@ -143,6 +143,7 @@ int damon_hot_score(struct damon_ctx *c, struct damon_region *r,
 	 * Transform it to fit in [0, DAMOS_MAX_SCORE]
 	 */
 	hotness = hotness * DAMOS_MAX_SCORE / DAMON_MAX_SUBSCORE;
+	hotness = max(min(hotness, DAMOS_MAX_SCORE), 0);
 
 	return hotness;
 }