bk commit into 4.1 tree (svoj:1.2590) BUG#24855

[Sergey Vojtovich]

Below is the list of changes that have just been committed into a local
4.1 repository of svoj. When svoj does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
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see http://dev.mysql.com/doc/mysql/en/installing-source-tree.html

ChangeSet@stripped, 2007-01-16 18:05:37+04:00, svoj@stripped +1 -0
  BUG#24855 - Crash mysqld 4.1.21 with corrupted tables
  
  Accessing fixed record format table with crashed key definition results
  in server/myisamchk segmentation fault.
  
  This is fixed by refusing to open such tables. Affects MyISAM only.
  No test case, since it requires crashed table.

  myisam/mi_open.c@stripped, 2007-01-16 18:05:36+04:00, svoj@stripped +7 -1
    Refuse to open fixed record format table with key segment that includes
    BLOB part (which is true only for tables with crashed key definition).

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	svoj
# Host:	june.mysql.com
# Root:	/home/svoj/devel/mysql/BUG24855/mysql-4.1-engines

--- 1.88/myisam/mi_open.c	2006-12-02 02:11:39 +04:00
+++ 1.89/myisam/mi_open.c	2007-01-16 18:05:36 +04:00
@@ -315,7 +315,13 @@ MI_INFO *mi_open(const char *name, int m
 	for (j=0 ; j < share->keyinfo[i].keysegs; j++,pos++)
 	{
 	  disk_pos=mi_keyseg_read(disk_pos, pos);
-
+          if (pos->flag & HA_BLOB_PART &&
+              ! (share->options & (HA_OPTION_COMPRESS_RECORD |
+                                   HA_OPTION_PACK_RECORD)))
+          {
+            my_errno= HA_ERR_CRASHED;
+            goto err;
+          }
 	  if (pos->type == HA_KEYTYPE_TEXT || pos->type == HA_KEYTYPE_VARTEXT)
 	  {
 	    if (!pos->language)