Merge xiphis.org:/home/antony/work2/p3-bug22694.1

into  xiphis.org:/home/antony/work2/p1-bug22694.2

include/mysql.h

@@ -293,12 +293,6 @@ typedef struct st_mysql
   /* needed for embedded server - no net buffer to store the 'info' */
   char *info_buffer;
 #endif
-  /*
-    In embedded server it points to the statement that is processed
-    in the current query. We store some results directly in statement
-    fields then.
-  */
-  struct st_mysql_stmt *current_stmt;
 } MYSQL;
 
 typedef struct st_mysql_res {

libmysqld/lib_sql.cc

@@ -100,7 +100,6 @@ emb_advanced_command(MYSQL *mysql, enum enum_server_command command,
   mysql->affected_rows= ~(my_ulonglong) 0;
   mysql->field_count= 0;
   net->last_errno= 0;
-  mysql->current_stmt= stmt;
 
   thd->store_globals();				// Fix if more than one connect
   /* 

mysql-test/r/myisam.result

@@ -1757,4 +1757,49 @@ create table t1 (a int not null, key key_block_size=1024 (a));
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '=1024 (a))' at line 1
 create table t1 (a int not null, key `a` key_block_size=1024 (a));
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_block_size=1024 (a))' at line 1
+CREATE TABLE t1 (
+c1 INT,
+c2 VARCHAR(300),
+KEY (c1) KEY_BLOCK_SIZE 1024,
+KEY (c2) KEY_BLOCK_SIZE 8192
+);
+INSERT INTO t1 VALUES (10, REPEAT('a', CEIL(RAND(10) * 300))),
+(11, REPEAT('b', CEIL(RAND() * 300))),
+(12, REPEAT('c', CEIL(RAND() * 300))),
+(13, REPEAT('d', CEIL(RAND() * 300))),
+(14, REPEAT('e', CEIL(RAND() * 300))),
+(15, REPEAT('f', CEIL(RAND() * 300))),
+(16, REPEAT('g', CEIL(RAND() * 300))),
+(17, REPEAT('h', CEIL(RAND() * 300))),
+(18, REPEAT('i', CEIL(RAND() * 300))),
+(19, REPEAT('j', CEIL(RAND() * 300))),
+(20, REPEAT('k', CEIL(RAND() * 300))),
+(21, REPEAT('l', CEIL(RAND() * 300))),
+(22, REPEAT('m', CEIL(RAND() * 300))),
+(23, REPEAT('n', CEIL(RAND() * 300))),
+(24, REPEAT('o', CEIL(RAND() * 300))),
+(25, REPEAT('p', CEIL(RAND() * 300))),
+(26, REPEAT('q', CEIL(RAND() * 300))),
+(27, REPEAT('r', CEIL(RAND() * 300))),
+(28, REPEAT('s', CEIL(RAND() * 300))),
+(29, REPEAT('t', CEIL(RAND() * 300))),
+(30, REPEAT('u', CEIL(RAND() * 300))),
+(31, REPEAT('v', CEIL(RAND() * 300))),
+(32, REPEAT('w', CEIL(RAND() * 300))),
+(33, REPEAT('x', CEIL(RAND() * 300))),
+(34, REPEAT('y', CEIL(RAND() * 300))),
+(35, REPEAT('z', CEIL(RAND() * 300)));
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT * FROM t1;
+CHECK TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+REPAIR TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	repair	status	OK
+DELETE FROM t1 WHERE c1 >= 10;
+CHECK TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+DROP TABLE t1;
 End of 5.1 tests

mysql-test/t/myisam.test

@@ -1054,4 +1054,47 @@ create table t1 (a int not null, key key_block_size=1024 (a));
 --error 1064
 create table t1 (a int not null, key `a` key_block_size=1024 (a));
 
+#
+# Bug#22119 - Changing MI_KEY_BLOCK_LENGTH makes a wrong myisamchk
+#
+CREATE TABLE t1 (
+  c1 INT,
+  c2 VARCHAR(300),
+  KEY (c1) KEY_BLOCK_SIZE 1024,
+  KEY (c2) KEY_BLOCK_SIZE 8192
+  );
+INSERT INTO t1 VALUES (10, REPEAT('a', CEIL(RAND(10) * 300))),
+  (11, REPEAT('b', CEIL(RAND() * 300))),
+  (12, REPEAT('c', CEIL(RAND() * 300))),
+  (13, REPEAT('d', CEIL(RAND() * 300))),
+  (14, REPEAT('e', CEIL(RAND() * 300))),
+  (15, REPEAT('f', CEIL(RAND() * 300))),
+  (16, REPEAT('g', CEIL(RAND() * 300))),
+  (17, REPEAT('h', CEIL(RAND() * 300))),
+  (18, REPEAT('i', CEIL(RAND() * 300))),
+  (19, REPEAT('j', CEIL(RAND() * 300))),
+  (20, REPEAT('k', CEIL(RAND() * 300))),
+  (21, REPEAT('l', CEIL(RAND() * 300))),
+  (22, REPEAT('m', CEIL(RAND() * 300))),
+  (23, REPEAT('n', CEIL(RAND() * 300))),
+  (24, REPEAT('o', CEIL(RAND() * 300))),
+  (25, REPEAT('p', CEIL(RAND() * 300))),
+  (26, REPEAT('q', CEIL(RAND() * 300))),
+  (27, REPEAT('r', CEIL(RAND() * 300))),
+  (28, REPEAT('s', CEIL(RAND() * 300))),
+  (29, REPEAT('t', CEIL(RAND() * 300))),
+  (30, REPEAT('u', CEIL(RAND() * 300))),
+  (31, REPEAT('v', CEIL(RAND() * 300))),
+  (32, REPEAT('w', CEIL(RAND() * 300))),
+  (33, REPEAT('x', CEIL(RAND() * 300))),
+  (34, REPEAT('y', CEIL(RAND() * 300))),
+  (35, REPEAT('z', CEIL(RAND() * 300)));
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT * FROM t1;
+CHECK TABLE t1;
+REPAIR TABLE t1;
+DELETE FROM t1 WHERE c1 >= 10;
+CHECK TABLE t1;
+DROP TABLE t1;
+
 --echo End of 5.1 tests

storage/myisam/mi_check.c

@@ -251,11 +251,12 @@ static int check_k_link(MI_CHECK *param, register MI_INFO *info, uint nr)
   my_off_t next_link;
   uint block_size=(nr+1)*MI_MIN_KEY_BLOCK_LENGTH;
   ha_rows records;
-  char llbuff[21],*buff;
+  char llbuff[21], llbuff2[21], *buff;
   DBUG_ENTER("check_k_link");
+  DBUG_PRINT("enter", ("block_size: %u", block_size));
 
   if (param->testflag & T_VERBOSE)
-    printf("block_size %4d:",block_size);
+    printf("block_size %4u:", block_size); /* purecov: tested */
 
   next_link=info->s->state.key_del[nr];
   records= (ha_rows) (info->state->key_file_length / block_size);
@@ -265,14 +266,46 @@ static int check_k_link(MI_CHECK *param, register MI_INFO *info, uint nr)
       DBUG_RETURN(1);
     if (param->testflag & T_VERBOSE)
       printf("%16s",llstr(next_link,llbuff));
-    if (next_link > info->state->key_file_length ||
-	next_link & (info->s->blocksize-1))
+
+    /* Key blocks must lay within the key file length entirely. */
+    if (next_link + block_size > info->state->key_file_length)
+    {
+      /* purecov: begin tested */
+      mi_check_print_error(param, "Invalid key block position: %s  "
+                           "key block size: %u  file_length: %s",
+                           llstr(next_link, llbuff), block_size,
+                           llstr(info->state->key_file_length, llbuff2));
+      DBUG_RETURN(1);
+      /* purecov: end */
+    }
+
+    /* Key blocks must be aligned at MI_MIN_KEY_BLOCK_LENGTH. */
+    if (next_link & (MI_MIN_KEY_BLOCK_LENGTH - 1))
+    {
+      /* purecov: begin tested */
+      mi_check_print_error(param, "Mis-aligned key block: %s  "
+                           "minimum key block length: %u",
+                           llstr(next_link, llbuff), MI_MIN_KEY_BLOCK_LENGTH);
       DBUG_RETURN(1);
+      /* purecov: end */
+    }
+
+    /*
+      Read the key block with MI_MIN_KEY_BLOCK_LENGTH to find next link.
+      If the key cache block size is smaller than block_size, we can so
+      avoid unecessary eviction of cache block.
+    */
     if (!(buff=key_cache_read(info->s->key_cache,
                               info->s->kfile, next_link, DFLT_INIT_HITS,
-                              (byte*) info->buff,
-			      myisam_block_size, block_size, 1)))
+                              (byte*) info->buff, MI_MIN_KEY_BLOCK_LENGTH,
+                              MI_MIN_KEY_BLOCK_LENGTH, 1)))
+    {
+      /* purecov: begin tested */
+      mi_check_print_error(param, "key cache read error for block: %s",
+			   llstr(next_link,llbuff));
       DBUG_RETURN(1);
+      /* purecov: end */
+    }
     next_link=mi_sizekorr(buff);
     records--;
     param->key_file_blocks+=block_size;
@@ -556,17 +589,37 @@ static int chk_index_down(MI_CHECK *param, MI_INFO *info, MI_KEYDEF *keyinfo,
                      ha_checksum *key_checksum, uint level)
 {
   char llbuff[22],llbuff2[22];
-  if (page > info->state->key_file_length || (page & (info->s->blocksize -1)))
-  {
-    my_off_t max_length=my_seek(info->s->kfile,0L,MY_SEEK_END,MYF(0));
-    mi_check_print_error(param,"Wrong pagepointer: %s at page: %s",
-                llstr(page,llbuff),llstr(page,llbuff2));
-
-    if (page+info->s->blocksize > max_length)
+  DBUG_ENTER("chk_index_down");
+
+  /* Key blocks must lay within the key file length entirely. */
+  if (page + keyinfo->block_length > info->state->key_file_length)
+  {
+    /* purecov: begin tested */
+    /* Give it a chance to fit in the real file size. */
+    my_off_t max_length= my_seek(info->s->kfile, 0L, MY_SEEK_END, MYF(0));
+    mi_check_print_error(param, "Invalid key block position: %s  "
+                         "key block size: %u  file_length: %s",
+                         llstr(page, llbuff), keyinfo->block_length,
+                         llstr(info->state->key_file_length, llbuff2));
+    if (page + keyinfo->block_length > max_length)
       goto err;
-    info->state->key_file_length=(max_length &
-                                  ~ (my_off_t) (info->s->blocksize-1));
+    /* Fix the remebered key file length. */
+    info->state->key_file_length= (max_length &
+                                   ~ (my_off_t) (keyinfo->block_length - 1));
+    /* purecov: end */
+  }
+
+  /* Key blocks must be aligned at MI_MIN_KEY_BLOCK_LENGTH. */
+  if (page & (MI_MIN_KEY_BLOCK_LENGTH - 1))
+  {
+    /* purecov: begin tested */
+    mi_check_print_error(param, "Mis-aligned key block: %s  "
+                         "minimum key block length: %u",
+                         llstr(page, llbuff), MI_MIN_KEY_BLOCK_LENGTH);
+    goto err;
+    /* purecov: end */
   }
+
   if (!_mi_fetch_keypage(info,keyinfo,page, DFLT_INIT_HITS,buff,0))
   {
     mi_check_print_error(param,"Can't read key from filepos: %s",
@@ -577,9 +630,12 @@ static int chk_index_down(MI_CHECK *param, MI_INFO *info, MI_KEYDEF *keyinfo,
   if (chk_index(param,info,keyinfo,page,buff,keys,key_checksum,level))
     goto err;
 
-  return 0;
+  DBUG_RETURN(0);
+
+  /* purecov: begin tested */
 err:
-  return 1;
+  DBUG_RETURN(1);
+  /* purecov: end */
 }
 
 

storage/myisam/mi_dynrec.c

@@ -1203,9 +1203,11 @@ ulong _mi_rec_unpack(register MI_INFO *info, register byte *to, byte *from,
       {
 	uint size_length=rec_length- mi_portable_sizeof_char_ptr;
 	ulong blob_length=_mi_calc_blob_length(size_length,from);
-	if ((ulong) (from_end-from) - size_length < blob_length ||
-	    min_pack_length > (uint) (from_end -(from+size_length+blob_length)))
-	  goto err;
+        ulong from_left= (ulong) (from_end - from);
+        if (from_left < size_length ||
+            from_left - size_length < blob_length ||
+            from_left - size_length - blob_length < min_pack_length)
+          goto err;
 	memcpy((byte*) to,(byte*) from,(size_t) size_length);
 	from+=size_length;
 	memcpy_fixed((byte*) to+size_length,(byte*) &from,sizeof(char*));