BUG#11684 fix.

Repair crashes mysql when table has fulltext index.


myisam/sort.c:
  Use static ft_buf instead of dynamic mergebuf. Latter could be NULL if record has long words.
mysql-test/r/fulltext.result:
  Test case for BUG#11684 - repair crashes mysql when table has fulltext index.
mysql-test/t/fulltext.test:
  Test case for BUG#11684 - repair crashes mysql when table has fulltext index.

1 files changed, 8 insertions, 6 deletions

diff --git a/myisam/sort.c b/myisam/sort.c
index 95ede6ddaa1..45a670c3f6b 100644
--- a/myisam/sort.c
+++ b/myisam/sort.c
@@ -532,13 +532,15 @@ int thr_write_keys(MI_SORT_PARAM *sort_param)
 
       while (!got_error &&
 	     !my_b_read(&sinfo->tempfile_for_exceptions,(byte*)&key_length,
-			sizeof(key_length)) &&
-	     !my_b_read(&sinfo->tempfile_for_exceptions,(byte*)mergebuf,
-			(uint) key_length))
+			sizeof(key_length)))
       {
-	if (_mi_ck_write(info,sinfo->key,(uchar*) mergebuf,
-			 key_length - info->s->rec_reflength))
-	  got_error=1;
+        byte ft_buf[HA_FT_MAXLEN + HA_FT_WLEN + 10];
+        if (key_length > sizeof(ft_buf) ||
+            my_b_read(&sinfo->tempfile_for_exceptions, (byte*)ft_buf,
+                      (uint)key_length) ||
+            _mi_ck_write(info, sinfo->key, (uchar*)ft_buf,
+                         key_length - info->s->rec_reflength))
+          got_error=1;
       }
     }
   }