1 files changed, 33 insertions, 9 deletions

diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 6ca08ad887c..1fc1e92356e 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -220,7 +220,7 @@ static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c,
                                 struct jffs2_tmp_dnode_info *tn)
 {
         uint32_t fn_end = tn->fn->ofs + tn->fn->size;
-        struct jffs2_tmp_dnode_info *this;
+        struct jffs2_tmp_dnode_info *this, *ptn;
 
         dbg_readinode("insert fragment %#04x-%#04x, ver %u at %08x\n", tn->fn->ofs, fn_end, tn->version, ref_offset(tn->fn->raw));
 
@@ -251,11 +251,18 @@ static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c,
         if (this) {
                 /* If the node is coincident with another at a lower address,
                    back up until the other node is found. It may be relevant */
-                while (this->overlapped)
-                        this = tn_prev(this);
-
-                /* First node should never be marked overlapped */
-                BUG_ON(!this);
+                while (this->overlapped) {
+                        ptn = tn_prev(this);
+                        if (!ptn) {
+                                /*
+                                 * We killed a node which set the overlapped
+                                 * flags during the scan. Fix it up.
+                                 */
+                                this->overlapped = 0;
+                                break;
+                        }
+                        this = ptn;
+                }
                 dbg_readinode("'this' found %#04x-%#04x (%s)\n", this->fn->ofs, this->fn->ofs + this->fn->size, this->fn ? "data" : "hole");
         }
 
@@ -360,7 +367,17 @@ static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c,
                         }
                         if (!this->overlapped)
                                 break;
-                        this = tn_prev(this);
+
+                        ptn = tn_prev(this);
+                        if (!ptn) {
+                                /*
+                                 * We killed a node which set the overlapped
+                                 * flags during the scan. Fix it up.
+                                 */
+                                this->overlapped = 0;
+                                break;
+                        }
+                        this = ptn;
                 }
         }
 
@@ -456,8 +473,15 @@ static int jffs2_build_inode_fragtree(struct jffs2_sb_info *c,
                 eat_last(&rii->tn_root, &last->rb);
                 ver_insert(&ver_root, last);
 
-                if (unlikely(last->overlapped))
-                        continue;
+                if (unlikely(last->overlapped)) {
+                        if (pen)
+                                continue;
+                        /*
+                         * We killed a node which set the overlapped
+                         * flags during the scan. Fix it up.
+                         */
+                        last->overlapped = 0;
+                }
 
                 /* Now we have a bunch of nodes in reverse version
                    order, in the tree at ver_root. Most of the time,