cifs: check for NULL last_entry before calling cifs_save_resume_key
[linux-2.6.git] / fs / cifs / readdir.c
index 5de03ec..a090bbe 100644 (file)
@@ -554,7 +554,10 @@ static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
                                 rc);
                        return rc;
                }
-               cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
+               /* FindFirst/Next set last_entry to NULL on malformed reply */
+               if (cifsFile->srch_inf.last_entry)
+                       cifs_save_resume_key(cifsFile->srch_inf.last_entry,
+                                               cifsFile);
        }
 
        while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
@@ -562,7 +565,10 @@ static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
                cFYI(1, "calling findnext2");
                rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
                                  &cifsFile->srch_inf);
-               cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
+               /* FindFirst/Next set last_entry to NULL on malformed reply */
+               if (cifsFile->srch_inf.last_entry)
+                       cifs_save_resume_key(cifsFile->srch_inf.last_entry,
+                                               cifsFile);
                if (rc)
                        return -ENOENT;
        }