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-rw-r--r--fs/btrfs/disk-io.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index bb6cdbd..c7d8fb0 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);
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