1 files changed, 6 insertions, 0 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index bb6cdbda4f56..c7d8fb0dbff6 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -613,6 +613,12 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
                 goto err;
         }
         found_level = btrfs_header_level(eb);
+        if (found_level >= BTRFS_MAX_LEVEL) {
+                btrfs_info(root->fs_info, "bad tree block level %d\n",
+                           (int)btrfs_header_level(eb));
+                ret = -EIO;
+                goto err;
+        }
 
         btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb),
                                        eb, found_level);