3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #***********************************************************************
11 # This file implements regression tests for SQLite library.
13 # This file implements tests to make sure SQLite does not crash or
14 # segfault if it sees a corrupt database file.
16 # $Id: corrupt2.test,v 1.20 2009/04/06 17:50:03 danielk1977 Exp $
18 set testdir [file dirname $argv0]
19 source $testdir/tester.tcl
20 set testprefix corrupt2
22 # Do not use a codec for tests in this file, as the database file is
23 # manipulated directly using tcl scripts (using the [hexio_write] command).
27 # These tests deal with corrupt database files
29 database_may_be_corrupt
32 catch { set presql "$::G(perm:presql);" }
33 unset -nocomplain ::G(perm:presql)
35 # The following tests - corrupt2-1.* - create some databases corrupted in
36 # specific ways and ensure that SQLite detects them as corrupt.
38 do_test corrupt2-1.1 {
41 PRAGMA page_size=1024;
42 CREATE TABLE abc(a, b, c);
46 do_test corrupt2-1.2 {
48 # Corrupt the 16 byte magic string at the start of the file
49 forcedelete corrupt.db
50 forcedelete corrupt.db-journal
51 forcecopy test.db corrupt.db
52 set f [open corrupt.db RDWR]
57 sqlite3 db2 corrupt.db
60 SELECT * FROM sqlite_master;
62 } {1 {file is not a database}}
64 do_test corrupt2-1.3 {
67 # Corrupt the page-size (bytes 16 and 17 of page 1).
68 forcedelete corrupt.db
69 forcedelete corrupt.db-journal
70 forcecopy test.db corrupt.db
71 set f [open corrupt.db RDWR]
72 fconfigure $f -encoding binary
74 puts -nonewline $f "\x00\xFF"
77 sqlite3 db2 corrupt.db
80 SELECT * FROM sqlite_master;
82 } {1 {file is not a database}}
84 do_test corrupt2-1.4 {
87 # Corrupt the free-block list on page 1.
88 forcedelete corrupt.db
89 forcedelete corrupt.db-journal
90 forcecopy test.db corrupt.db
91 set f [open corrupt.db RDWR]
92 fconfigure $f -encoding binary
94 puts -nonewline $f "\xFF\xFF"
97 sqlite3 db2 corrupt.db
100 SELECT * FROM sqlite_master;
102 } {1 {database disk image is malformed}}
104 do_test corrupt2-1.5 {
107 # Corrupt the free-block list on page 1.
108 forcedelete corrupt.db
109 forcedelete corrupt.db-journal
110 forcecopy test.db corrupt.db
111 set f [open corrupt.db RDWR]
112 fconfigure $f -encoding binary
114 puts -nonewline $f "\x00\xC8"
116 puts -nonewline $f "\x00\x00"
117 puts -nonewline $f "\x10\x00"
120 sqlite3 db2 corrupt.db
123 SELECT * FROM sqlite_master;
125 } {1 {database disk image is malformed}}
128 # Corrupt a database by having 2 indices of the same name:
129 do_test corrupt2-2.1 {
131 forcedelete corrupt.db
132 forcedelete corrupt.db-journal
133 forcecopy test.db corrupt.db
135 sqlite3 db2 corrupt.db
138 CREATE INDEX a1 ON abc(a);
139 CREATE INDEX a2 ON abc(b);
140 PRAGMA writable_schema = 1;
142 SET name = 'a3', sql = 'CREATE INDEX a3' || substr(sql, 16, 10000)
143 WHERE type = 'index';
144 PRAGMA writable_schema = 0;
148 sqlite3 db2 corrupt.db
151 SELECT * FROM sqlite_master;
153 } {1 {malformed database schema (a3) - index a3 already exists}}
157 do_test corrupt2-3.1 {
158 forcedelete corrupt.db
159 forcedelete corrupt.db-journal
160 sqlite3 db2 corrupt.db
164 PRAGMA auto_vacuum = 1;
165 PRAGMA page_size = 1024;
166 CREATE TABLE t1(a, b, c);
167 CREATE TABLE t2(a, b, c);
168 INSERT INTO t2 VALUES(randomblob(100), randomblob(100), randomblob(100));
169 INSERT INTO t2 SELECT * FROM t2;
170 INSERT INTO t2 SELECT * FROM t2;
171 INSERT INTO t2 SELECT * FROM t2;
172 INSERT INTO t2 SELECT * FROM t2;
177 # On the root page of table t2 (page 4), set one of the child page-numbers
178 # to 0. This corruption will be detected when SQLite attempts to update
179 # the pointer-map after moving the content of page 4 to page 3 as part
180 # of the DROP TABLE operation below.
182 set fd [open corrupt.db r+]
183 fconfigure $fd -encoding binary -translation binary
184 seek $fd [expr 1024*3 + 12]
185 set zCelloffset [read $fd 2]
186 binary scan $zCelloffset S iCelloffset
187 seek $fd [expr 1024*3 + $iCelloffset]
188 puts -nonewline $fd "\00\00\00\00"
191 sqlite3 db2 corrupt.db
196 } {1 {database disk image is malformed}}
198 do_test corrupt2-4.1 {
202 } {1 {database disk image is malformed}}
206 unset -nocomplain result
207 do_test corrupt2-5.1 {
208 forcedelete corrupt.db
209 forcedelete corrupt.db-journal
210 sqlite3 db2 corrupt.db
214 PRAGMA auto_vacuum = 0;
215 PRAGMA page_size = 1024;
216 CREATE TABLE t1(a, b, c);
217 CREATE TABLE t2(a, b, c);
218 INSERT INTO t2 VALUES(randomblob(100), randomblob(100), randomblob(100));
219 INSERT INTO t2 SELECT * FROM t2;
220 INSERT INTO t2 SELECT * FROM t2;
221 INSERT INTO t2 SELECT * FROM t2;
222 INSERT INTO t2 SELECT * FROM t2;
223 INSERT INTO t1 SELECT * FROM t2;
228 # This block links a page from table t2 into the t1 table structure.
230 set fd [open corrupt.db r+]
231 fconfigure $fd -encoding binary -translation binary
232 seek $fd [expr 1024 + 12]
233 set zCelloffset [read $fd 2]
234 binary scan $zCelloffset S iCelloffset
235 seek $fd [expr 1024 + $iCelloffset]
236 set zChildPage [read $fd 4]
237 seek $fd [expr 2*1024 + 12]
238 set zCelloffset [read $fd 2]
239 binary scan $zCelloffset S iCelloffset
240 seek $fd [expr 2*1024 + $iCelloffset]
241 puts -nonewline $fd $zChildPage
244 sqlite3 db2 corrupt.db
246 db2 eval {SELECT rowid FROM t1} {
247 set result [db2 eval {pragma integrity_check}]
251 } {{*** in database main ***
252 On tree page 2 cell 0: 2nd reference to page 10
253 Page 4 is never used}}
257 proc corruption_test {args} {
264 forcedelete corrupt.db
265 forcedelete corrupt.db-journal
267 sqlite3 db corrupt.db
275 sqlite3 db corrupt.db
279 ifcapable autovacuum {
280 # The tests within this block - corrupt2-6.* - aim to test corruption
281 # detection within an incremental-vacuum. When an incremental-vacuum
282 # step is executed, the last non-free page of the database file is
283 # moved into a free space in the body of the file. After doing so,
284 # the page reference in the parent page must be updated to refer
285 # to the new location. These tests test the outcome of corrupting
286 # that page reference before performing the incremental vacuum.
289 # The last page in the database page is the second page
290 # in an overflow chain.
292 corruption_test -sqlprep {
293 PRAGMA auto_vacuum = incremental;
294 PRAGMA page_size = 1024;
295 CREATE TABLE t1(a, b);
296 INSERT INTO t1 VALUES(1, randomblob(2500));
297 INSERT INTO t1 VALUES(2, randomblob(2500));
298 DELETE FROM t1 WHERE a = 1;
300 hexio_write corrupt.db [expr 1024*5] 00000008
302 do_test corrupt2-6.1 {
303 catchsql " $::presql pragma incremental_vacuum = 1 "
304 } {1 {database disk image is malformed}}
307 # The last page in the database page is a non-root b-tree page.
309 corruption_test -sqlprep {
310 PRAGMA auto_vacuum = incremental;
311 PRAGMA page_size = 1024;
312 CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
313 INSERT INTO t1 VALUES(1, randomblob(2500));
314 INSERT INTO t1 VALUES(2, randomblob(50));
315 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
316 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
317 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
318 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
319 DELETE FROM t1 WHERE a = 1;
321 hexio_write corrupt.db [expr 1024*2 + 8] 00000009
323 do_test corrupt2-6.2 {
324 catchsql " $::presql pragma incremental_vacuum = 1 "
325 } {1 {database disk image is malformed}}
328 # Set up a pointer-map entry so that the last page of the database
329 # file appears to be a b-tree root page. This should be detected
332 corruption_test -sqlprep {
333 PRAGMA auto_vacuum = incremental;
334 PRAGMA page_size = 1024;
335 CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
336 INSERT INTO t1 VALUES(1, randomblob(2500));
337 INSERT INTO t1 VALUES(2, randomblob(2500));
338 INSERT INTO t1 VALUES(3, randomblob(2500));
339 DELETE FROM t1 WHERE a = 1;
341 set nPage [expr [file size corrupt.db] / 1024]
342 hexio_write corrupt.db [expr 1024 + ($nPage-3)*5] 010000000
344 do_test corrupt2-6.3 {
345 catchsql " $::presql pragma incremental_vacuum = 1 "
346 } {1 {database disk image is malformed}}
349 if {![nonzero_reserved_bytes]} {
350 corruption_test -sqlprep {
351 PRAGMA auto_vacuum = 1;
352 PRAGMA page_size = 1024;
353 CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
354 INSERT INTO t1 VALUES(1, randomblob(2500));
355 DELETE FROM t1 WHERE a = 1;
357 set nAppend [expr 1024*207 - [file size corrupt.db]]
358 set fd [open corrupt.db r+]
360 puts -nonewline $fd [string repeat x $nAppend]
362 hexio_write corrupt.db 28 00000000
364 do_test corrupt2-6.4 {
370 } {1 {database disk image is malformed}}
377 PRAGMA auto_vacuum = 0;
378 PRAGMA page_size = 1024;
379 CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
380 CREATE INDEX i1 ON t1(b);
381 INSERT INTO t1 VALUES(1, randomblob(50));
382 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
383 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
384 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
385 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
386 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
387 INSERT INTO t1 SELECT NULL, randomblob(50) FROM t1;
390 corruption_test -sqlprep $sqlprep -corrupt {
391 # Set the page-flags of one of the leaf pages of the index B-Tree to
392 # 0x0D (interpreted by SQLite as "leaf page of a table B-Tree").
394 set fd [open corrupt.db r+]
395 fconfigure $fd -translation binary -encoding binary
396 seek $fd [expr 1024*2 + 8]
397 set zRightChild [read $fd 4]
398 binary scan $zRightChild I iRightChild
399 seek $fd [expr 1024*($iRightChild-1)]
400 puts -nonewline $fd "\x0D"
403 do_test corrupt2-7.1 {
404 catchsql " $::presql SELECT b FROM t1 ORDER BY b ASC "
405 } {1 {database disk image is malformed}}
408 corruption_test -sqlprep $sqlprep -corrupt {
409 # Mess up the page-header of one of the leaf pages of the index B-Tree.
410 # The corruption is detected as part of an OP_Prev opcode.
412 set fd [open corrupt.db r+]
413 fconfigure $fd -translation binary -encoding binary
414 seek $fd [expr 1024*2 + 12]
415 set zCellOffset [read $fd 2]
416 binary scan $zCellOffset S iCellOffset
417 seek $fd [expr 1024*2 + $iCellOffset]
418 set zChild [read $fd 4]
419 binary scan $zChild I iChild
420 seek $fd [expr 1024*($iChild-1)+3]
421 puts -nonewline $fd "\xFFFF"
424 do_test corrupt2-7.1 {
425 catchsql " $::presql SELECT b FROM t1 ORDER BY b DESC "
426 } {1 {database disk image is malformed}}
429 corruption_test -sqlprep $sqlprep -corrupt {
430 # Set the page-flags of one of the leaf pages of the table B-Tree to
431 # 0x0A (interpreted by SQLite as "leaf page of an index B-Tree").
433 set fd [open corrupt.db r+]
434 fconfigure $fd -translation binary -encoding binary
435 seek $fd [expr 1024*1 + 8]
436 set zRightChild [read $fd 4]
437 binary scan $zRightChild I iRightChild
438 seek $fd [expr 1024*($iRightChild-1)]
439 puts -nonewline $fd "\x0A"
442 do_test corrupt2-8.1 {
443 catchsql " $::presql SELECT * FROM t1 WHERE rowid=1000 "
444 } {1 {database disk image is malformed}}
447 corruption_test -sqlprep {
448 CREATE TABLE t1(a, b, c); CREATE TABLE t8(a, b, c); CREATE TABLE tE(a, b, c);
449 CREATE TABLE t2(a, b, c); CREATE TABLE t9(a, b, c); CREATE TABLE tF(a, b, c);
450 CREATE TABLE t3(a, b, c); CREATE TABLE tA(a, b, c); CREATE TABLE tG(a, b, c);
451 CREATE TABLE t4(a, b, c); CREATE TABLE tB(a, b, c); CREATE TABLE tH(a, b, c);
452 CREATE TABLE t5(a, b, c); CREATE TABLE tC(a, b, c); CREATE TABLE tI(a, b, c);
453 CREATE TABLE t6(a, b, c); CREATE TABLE tD(a, b, c); CREATE TABLE tJ(a, b, c);
454 CREATE TABLE x1(a, b, c); CREATE TABLE x8(a, b, c); CREATE TABLE xE(a, b, c);
455 CREATE TABLE x2(a, b, c); CREATE TABLE x9(a, b, c); CREATE TABLE xF(a, b, c);
456 CREATE TABLE x3(a, b, c); CREATE TABLE xA(a, b, c); CREATE TABLE xG(a, b, c);
457 CREATE TABLE x4(a, b, c); CREATE TABLE xB(a, b, c); CREATE TABLE xH(a, b, c);
458 CREATE TABLE x5(a, b, c); CREATE TABLE xC(a, b, c); CREATE TABLE xI(a, b, c);
459 CREATE TABLE x6(a, b, c); CREATE TABLE xD(a, b, c); CREATE TABLE xJ(a, b, c);
461 set fd [open corrupt.db r+]
462 fconfigure $fd -translation binary -encoding binary
464 set zRightChild [read $fd 4]
465 binary scan $zRightChild I iRightChild
466 seek $fd [expr 1024*($iRightChild-1)+3]
467 puts -nonewline $fd "\x00\x00"
470 do_test corrupt2-9.1 {
471 catchsql " $::presql SELECT sql FROM sqlite_master "
472 } {1 {database disk image is malformed}}
475 corruption_test -sqlprep {
476 CREATE TABLE t1(a, b, c);
477 CREATE TABLE t2(a, b, c);
478 PRAGMA writable_schema = 1;
479 UPDATE sqlite_master SET rootpage = NULL WHERE name = 't2';
481 do_test corrupt2-10.1 {
482 catchsql " $::presql SELECT * FROM t2 "
483 } {1 {malformed database schema (t2)}}
484 do_test corrupt2-10.2 {
489 corruption_test -sqlprep {
490 PRAGMA auto_vacuum = incremental;
491 CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
492 CREATE TABLE t2(a INTEGER PRIMARY KEY, b);
493 INSERT INTO t1 VALUES(1, randstr(100,100));
494 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
495 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
496 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
497 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
498 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
499 INSERT INTO t2 SELECT * FROM t1;
502 set offset [expr [file size corrupt.db] - 1024]
503 hexio_write corrupt.db $offset FF
504 hexio_write corrupt.db 24 12345678
506 do_test corrupt2-11.1 {
507 catchsql " $::presql PRAGMA incremental_vacuum "
508 } {1 {database disk image is malformed}}
510 corruption_test -sqlprep {
511 PRAGMA auto_vacuum = incremental;
512 CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
513 CREATE TABLE t2(a INTEGER PRIMARY KEY, b);
514 INSERT INTO t1 VALUES(1, randstr(100,100));
515 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
516 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
517 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
518 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
519 INSERT INTO t1 SELECT NULL, randstr(100,100) FROM t1;
520 INSERT INTO t2 SELECT * FROM t1;
523 set pgno [expr [file size corrupt.db] / 1024]
524 hexio_write corrupt.db [expr 1024+5*($pgno-3)] 03
525 hexio_write corrupt.db 24 12345678
527 do_test corrupt2-12.1 {
528 catchsql " $::presql PRAGMA incremental_vacuum "
529 } {1 {database disk image is malformed}}
532 ifcapable autovacuum {
533 # It is not possible for the last page in a database file to be the
534 # pending-byte page (AKA the locking page). This test verifies that if
535 # an attempt is made to commit a transaction to such an auto-vacuum
536 # database SQLITE_CORRUPT is returned.
538 corruption_test -tclprep {
540 PRAGMA auto_vacuum = full;
541 PRAGMA page_size = 1024;
542 CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
543 INSERT INTO t1 VALUES(NULL, randstr(50,50));
545 for {set ii 0} {$ii < 10} {incr ii} {
546 db eval " $::presql INSERT INTO t1 SELECT NULL, randstr(50,50) FROM t1 "
549 do_test corrupt2-13.1 {
551 } $::sqlite_pending_byte
552 hexio_write corrupt.db [expr $::sqlite_pending_byte+1023] 00
553 hexio_write corrupt.db 28 00000000
555 do_test corrupt2-13.2 {
557 } [expr $::sqlite_pending_byte + 1024]
558 do_test corrupt2-13.3 {
559 catchsql { DELETE FROM t1 WHERE rowid < 30; }
560 } {1 {database disk image is malformed}}
564 #-------------------------------------------------------------------------
565 # Test that PRAGMA integrity_check detects cases where the freelist-count
566 # header field is smaller than the actual number of pages on the freelist.
570 do_execsql_test 14.0 {
571 PRAGMA auto_vacuum = 0;
573 INSERT INTO t1 VALUES(randomblob(3500));
577 do_execsql_test 14.1 {
578 PRAGMA integrity_check;
579 PRAGMA freelist_count;
582 # There are now 3 free pages. Modify the header-field so that it
583 # (incorrectly) says that just 2 are free.
586 hexio_write test.db 36 [hexio_render_int32 2]
588 execsql { PRAGMA freelist_count }
591 do_execsql_test 14.3 {
592 PRAGMA integrity_check;
593 } {{*** in database main ***
594 Main freelist: size is 3 but should be 2}}
596 # Use 2 of the free pages on the free-list.
598 do_execsql_test 14.4 {
599 INSERT INTO t1 VALUES(randomblob(2500));
600 PRAGMA freelist_count;
603 do_execsql_test 14.5 {
604 PRAGMA integrity_check;
605 } {{*** in database main ***
606 Main freelist: size is 1 but should be 0}}