[JFFS2] Add some preemptive BUG checks for XATTR code

In a couple of places, we assume that what's at the end of the
->next_in_ino list is a struct jffs2_inode_cache. Let's check
for that, since we expect it to change soon.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
index 0fc19a2..4616fed 100644
--- a/fs/jffs2/erase.c
+++ b/fs/jffs2/erase.c
@@ -230,6 +230,7 @@ static inline void jffs2_remove_node_refs_from_ino_list(struct jffs2_sb_info *c,
 			   at the end of the linked list. Stash it and continue
 			   from the beginning of the list */
 			ic = (struct jffs2_inode_cache *)(*prev);
+			BUG_ON(ic->class != RAWNODE_CLASS_INODE_CACHE);
 			prev = &ic->nodes;
 			continue;
 		}