From: Jeff Mahoney <jeffm@suse.com>
Subject: hfs: avoid crash in hfs_bnode_create
Patch-mainline: not yet
References: bnc#552250

 Commit 634725a92938b0f282b17cec0b007dca77adebd2 removed the BUG_ON
 in hfs_bnode_create in hfsplus. This patch removes it from the hfs
 version and avoids an fsfuzzer crash.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Acked-by: Jeff Mahoney <jeffm@suse.com>
---
 fs/hfs/bnode.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/fs/hfs/bnode.c
+++ b/fs/hfs/bnode.c
@@ -413,7 +413,11 @@ struct hfs_bnode *hfs_bnode_create(struc
 	spin_lock(&tree->hash_lock);
 	node = hfs_bnode_findhash(tree, num);
 	spin_unlock(&tree->hash_lock);
-	BUG_ON(node);
+	if (node) {
+		printk(KERN_CRIT "new node %u already hashed?\n", num);
+		WARN_ON(1);
+		return node;
+	}
 	node = __hfs_bnode_create(tree, num);
 	if (!node)
 		return ERR_PTR(-ENOMEM);