[JFFS2] Fix readinode failure when read_dnode() detects CRC failure.

We should have stopped returning 1 from read_dnode() to indicate
failure. We can just mark the damn thing obsolete immediately. But I
missed a case where we don't.

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

1 files changed, 9 insertions, 14 deletions

diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index b66eb0c4a0c5..170da20b97c7 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -210,8 +210,7 @@ static void jffs2_kill_tn(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info *
  * offset, and the one with the smallest length will come first in the
  * ordering.
  *
- * Returns 0 if the node was inserted
- *         1 if the node is obsolete (because we can't mark it so yet)
+ * Returns 0 if the node was handled (including marking it obsolete)
  *         < 0 an if error occurred
  */
 static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c,
@@ -572,8 +571,7 @@ static struct jffs2_raw_node_ref *jffs2_first_valid_node(struct jffs2_raw_node_r
  * Helper function for jffs2_get_inode_nodes().
  * It is called every time an directory entry node is found.
  *
- * Returns: 0 on succes;
- *          1 if the node should be marked obsolete;
+ * Returns: 0 on success;
  *          negative error code on failure.
  */
 static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref,
@@ -680,8 +678,7 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r
  * Helper function for jffs2_get_inode_nodes().
  * It is called every time an inode node is found.
  *
- * Returns: 0 on success;
- *          1 if the node should be marked obsolete;
+ * Returns: 0 on success (possibly after marking a bad node obsolete);
  *          negative error code on failure.
  */
 static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref,
@@ -690,7 +687,7 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
 {
         struct jffs2_tmp_dnode_info *tn;
         uint32_t len, csize;
-        int ret = 1;
+        int ret = 0;
         uint32_t crc;
 
         /* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
@@ -719,8 +716,9 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
                 /* Sanity checks */
                 if (unlikely(je32_to_cpu(rd->offset) > je32_to_cpu(rd->isize)) ||
                     unlikely(PAD(je32_to_cpu(rd->csize) + sizeof(*rd)) != PAD(je32_to_cpu(rd->totlen)))) {
-                                JFFS2_WARNING("inode node header CRC is corrupted at %#08x\n", ref_offset(ref));
-                                jffs2_dbg_dump_node(c, ref_offset(ref));
+                        JFFS2_WARNING("inode node header CRC is corrupted at %#08x\n", ref_offset(ref));
+                        jffs2_dbg_dump_node(c, ref_offset(ref));
+                        jffs2_mark_node_obsolete(c, ref);
                         goto free_out;
                 }
 
@@ -775,6 +773,7 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
                         if (len >= csize && unlikely(tn->partial_crc != je32_to_cpu(rd->data_crc))) {
                                 JFFS2_NOTICE("wrong data CRC in data node at 0x%08x: read %#08x, calculated %#08x.\n",
                                         ref_offset(ref), tn->partial_crc, je32_to_cpu(rd->data_crc));
+                                jffs2_mark_node_obsolete(c, ref);
                                 goto free_out;
                         }
 
@@ -854,7 +853,6 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
  * It is called every time an unknown node is found.
  *
  * Returns: 0 on success;
- *          1 if the node should be marked obsolete;
  *          negative error code on failure.
  */
 static inline int read_unknown(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref, struct jffs2_unknown_node *un)
@@ -1088,10 +1086,7 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf
                         }
 
                         err = read_unknown(c, ref, &node->u);
-                        if (err == 1) {
-                                jffs2_mark_node_obsolete(c, ref);
-                                break;
-                        } else if (unlikely(err))
+                        if (unlikely(err))
                                 goto free_out;
 
                 }