1 files changed, 12 insertions, 8 deletions

diff --git a/fs/ubifs/scan.c b/fs/ubifs/scan.c
index 0ed82479b44b..892ebfee4fe5 100644
--- a/fs/ubifs/scan.c
+++ b/fs/ubifs/scan.c
@@ -238,12 +238,12 @@ void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs,
 {
         int len;
 
-        ubifs_err("corrupted data at LEB %d:%d", lnum, offs);
+        ubifs_err("corruption at LEB %d:%d", lnum, offs);
         if (dbg_failure_mode)
                 return;
         len = c->leb_size - offs;
-        if (len > 4096)
-                len = 4096;
+        if (len > 8192)
+                len = 8192;
         dbg_err("first %d bytes from LEB %d:%d", len, lnum, offs);
         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 4, buf, len, 1);
 }
@@ -256,7 +256,9 @@ void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs,
  * @sbuf: scan buffer (must be c->leb_size)
  *
  * This function scans LEB number @lnum and returns complete information about
- * its contents. Returns an error code in case of failure.
+ * its contents. Returns the scaned information in case of success and,
+ * %-EUCLEAN if the LEB neads recovery, and other negative error codes in case
+ * of failure.
  */
 struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
                                   int offs, void *sbuf)
@@ -279,7 +281,6 @@ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
                 cond_resched();
 
                 ret = ubifs_scan_a_node(c, buf, len, lnum, offs, 0);
-
                 if (ret > 0) {
                         /* Padding bytes or a valid padding node */
                         offs += ret;
@@ -304,7 +305,8 @@ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
                         goto corrupted;
                 default:
                         dbg_err("unknown");
-                        goto corrupted;
+                        err = -EINVAL;
+                        goto error;
                 }
 
                 err = ubifs_add_snod(c, sleb, buf, offs);
@@ -317,8 +319,10 @@ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
                 len -= node_len;
         }
 
-        if (offs % c->min_io_size)
-                goto corrupted;
+        if (offs % c->min_io_size) {
+                ubifs_err("empty space starts at non-aligned offset %d", offs);
+                goto corrupted;;
+        }
 
         ubifs_end_scan(c, sleb, lnum, offs);