1 files changed, 6 insertions, 0 deletions

diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index d32714094375..8a759016c2e3 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -409,6 +409,12 @@ static int nilfs_store_disk_layout(struct the_nilfs *nilfs,
         nilfs->ns_first_data_block = le64_to_cpu(sbp->s_first_data_block);
         nilfs->ns_r_segments_percentage =
                 le32_to_cpu(sbp->s_r_segments_percentage);
+        if (nilfs->ns_r_segments_percentage < 1 ||
+            nilfs->ns_r_segments_percentage > 99) {
+                printk(KERN_ERR "NILFS: invalid reserved segments percentage.\n");
+                return -EINVAL;
+        }
+
         nilfs_set_nsegments(nilfs, le64_to_cpu(sbp->s_nsegments));
         nilfs->ns_crc_seed = le32_to_cpu(sbp->s_crc_seed);
         return 0;