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-rw-r--r--drivers/md/raid5.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index ef0fd4830803..a095c7a4cd7c 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -6514,9 +6514,12 @@ raid5_store_stripe_size(struct mddev *mddev, const char *page, size_t len)
/*
* The value should not be bigger than PAGE_SIZE. It requires to
- * be multiple of DEFAULT_STRIPE_SIZE.
+ * be multiple of DEFAULT_STRIPE_SIZE and the value should be power
+ * of two.
*/
- if (new % DEFAULT_STRIPE_SIZE != 0 || new > PAGE_SIZE || new == 0)
+ if (new % DEFAULT_STRIPE_SIZE != 0 ||
+ new > PAGE_SIZE || new == 0 ||
+ new != roundup_pow_of_two(new))
return -EINVAL;
err = mddev_lock(mddev);