1 files changed, 26 insertions, 2 deletions

diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index fe7af9f676b..e5f6cf8a115 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -53,6 +53,25 @@ static int is_empty(void *buf, int len)
 }
 
 /**
+ * first_non_ff - find offset of the first non-0xff byte.
+ * @buf: buffer to search in
+ * @len: length of buffer
+ *
+ * This function returns offset of the first non-0xff byte in @buf or %-1 if
+ * the buffer contains only 0xff bytes.
+ */
+static int first_non_ff(void *buf, int len)
+{
+        uint8_t *p = buf;
+        int i;
+
+        for (i = 0; i < len; i++)
+                if (*p++ != 0xff)
+                        return i;
+        return -1;
+}
+
+/**
  * get_master_node - get the last valid master node allowing for corruption.
  * @c: UBIFS file-system description object
  * @lnum: LEB number
@@ -649,8 +668,13 @@ struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
                         clean_buf(c, &buf, lnum, &offs, &len);
                         need_clean = 1;
                 } else {
-                        ubifs_err("corrupt empty space at LEB %d:%d",
-                                  lnum, offs);
+                        int corruption = first_non_ff(buf, len);
+
+                        ubifs_err("corrupt empty space LEB %d:%d, corruption "
+                                  "starts at %d", lnum, offs, corruption);
+                        /* Make sure we dump interesting non-0xFF data */
+                        offs = corruption;
+                        buf += corruption;
                         goto corrupted;
                 }
         }