350 lines
10 KiB
Plaintext
350 lines
10 KiB
Plaintext
# 2004 August 30 {}
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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# This file implements regression tests for SQLite library.
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#
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# This file implements tests to make sure SQLite does not crash or
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# segfault if it sees a corrupt database file.
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#
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# $Id: corrupt.test,v 1.12 2009/07/13 09:41:45 danielk1977 Exp $
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catch {forcedelete test.db test.db-journal test.bu}
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Do not use a codec for tests in this file, as the database file is
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# manipulated directly using tcl scripts (using the [hexio_write] command).
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#
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do_not_use_codec
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# These tests deal with corrupt database files
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#
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database_may_be_corrupt
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# Construct a large database for testing.
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#
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do_test corrupt-1.1 {
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execsql {
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BEGIN;
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CREATE TABLE t1(x);
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INSERT INTO t1 VALUES(randstr(100,100));
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INSERT INTO t1 VALUES(randstr(90,90));
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INSERT INTO t1 VALUES(randstr(80,80));
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INSERT INTO t1 SELECT x || randstr(5,5) FROM t1;
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INSERT INTO t1 SELECT x || randstr(6,6) FROM t1;
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INSERT INTO t1 SELECT x || randstr(7,7) FROM t1;
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INSERT INTO t1 SELECT x || randstr(8,8) FROM t1;
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INSERT INTO t1 VALUES(randstr(3000,3000));
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INSERT INTO t1 SELECT x || randstr(9,9) FROM t1;
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INSERT INTO t1 SELECT x || randstr(10,10) FROM t1;
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INSERT INTO t1 SELECT x || randstr(11,11) FROM t1;
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INSERT INTO t1 SELECT x || randstr(12,12) FROM t1;
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CREATE INDEX t1i1 ON t1(x);
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CREATE TABLE t2 AS SELECT * FROM t1;
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DELETE FROM t2 WHERE rowid%5!=0;
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COMMIT;
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}
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} {}
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integrity_check corrupt-1.2
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# Setup for the tests. Make a backup copy of the good database in test.bu.
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# Create a string of garbage data that is 256 bytes long.
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#
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forcecopy test.db test.bu
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set fsize [file size test.db]
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set junk "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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while {[string length $junk]<256} {append junk $junk}
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set junk [string range $junk 0 255]
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# Go through the database and write garbage data into each 256 segment
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# of the file. Then do various operations on the file to make sure that
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# the database engine can recover gracefully from the corruption.
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#
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for {set i [expr {1*256}]} {$i<$fsize-256} {incr i 256} {
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set tn [expr {$i/256}]
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db close
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forcecopy test.bu test.db
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set fd [open test.db r+]
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fconfigure $fd -translation binary
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seek $fd $i
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puts -nonewline $fd $junk
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close $fd
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do_test corrupt-2.$tn.1 {
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sqlite3 db test.db
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catchsql {SELECT count(*) FROM sqlite_master}
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set x {}
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} {}
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do_test corrupt-2.$tn.2 {
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catchsql {SELECT count(*) FROM t1}
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set x {}
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} {}
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do_test corrupt-2.$tn.3 {
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catchsql {SELECT count(*) FROM t1 WHERE x>'abcdef'}
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set x {}
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} {}
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do_test corrupt-2.$tn.4 {
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catchsql {SELECT count(*) FROM t2}
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set x {}
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} {}
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do_test corrupt-2.$tn.5 {
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catchsql {CREATE TABLE t3 AS SELECT * FROM t1}
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set x {}
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} {}
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do_test corrupt-2.$tn.6 {
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catchsql {DROP TABLE t1}
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set x {}
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} {}
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do_test corrupt-2.$tn.7 {
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catchsql {PRAGMA integrity_check}
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set x {}
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} {}
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# Check that no page references were leaked.
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do_test corrupt-2.$tn.8 {
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set bt [btree_from_db db]
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db_enter db
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array set stats [btree_pager_stats $bt]
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db_leave db
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set stats(ref)
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} {0}
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}
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#------------------------------------------------------------------------
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# For these tests, swap the rootpage entries of t1 (a table) and t1i1 (an
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# index on t1) in sqlite_master. Then perform a few different queries
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# and make sure this is detected as corruption.
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#
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do_test corrupt-3.1 {
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db close
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forcecopy test.bu test.db
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sqlite3 db test.db
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list
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} {}
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do_test corrupt-3.2 {
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set t1_r [execsql {SELECT rootpage FROM sqlite_master WHERE name = 't1i1'}]
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set t1i1_r [execsql {SELECT rootpage FROM sqlite_master WHERE name = 't1'}]
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set cookie [expr [execsql {PRAGMA schema_version}] + 1]
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sqlite3_db_config db DEFENSIVE 0
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execsql "
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PRAGMA writable_schema = 1;
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UPDATE sqlite_master SET rootpage = $t1_r WHERE name = 't1';
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UPDATE sqlite_master SET rootpage = $t1i1_r WHERE name = 't1i1';
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PRAGMA writable_schema = 0;
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PRAGMA schema_version = $cookie;
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"
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} {}
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# This one tests the case caught by code in checkin [2313].
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do_test corrupt-3.3 {
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db close
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sqlite3 db test.db
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catchsql {
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INSERT INTO t1 VALUES('abc');
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}
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} {1 {database disk image is malformed}}
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do_test corrupt-3.4 {
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db close
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sqlite3 db test.db
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catchsql {
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SELECT * FROM t1;
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}
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} {1 {database disk image is malformed}}
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do_test corrupt-3.5 {
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db close
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sqlite3 db test.db
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catchsql {
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SELECT * FROM t1 WHERE oid = 10;
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}
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} {1 {database disk image is malformed}}
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do_test corrupt-3.6 {
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db close
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sqlite3 db test.db
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catchsql {
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SELECT * FROM t1 WHERE x = 'abcde';
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}
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} {1 {database disk image is malformed}}
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do_test corrupt-4.1 {
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db close
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forcedelete test.db test.db-journal
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sqlite3 db test.db
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execsql {
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PRAGMA page_size = 1024;
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CREATE TABLE t1(a INTEGER PRIMARY KEY, b TEXT);
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}
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for {set i 0} {$i < 10} {incr i} {
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set text [string repeat $i 220]
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execsql { INSERT INTO t1 VALUES($i, $text) }
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}
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execsql { CREATE INDEX i1 ON t1(b) }
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} {}
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do_test corrupt-4.2 {
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set iRoot [db one {SELECT rootpage FROM sqlite_master WHERE name = 'i1'}]
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set iOffset [hexio_get_int [hexio_read test.db [expr 12+($iRoot-1)*1024] 2]]
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set data [hexio_render_int32 [expr $iRoot - 1]]
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hexio_write test.db [expr ($iRoot-1)*1024 + $iOffset] $data
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db close
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sqlite3 db test.db
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# The following DELETE statement attempts to delete a cell stored on the
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# root page of index i1. After this cell is deleted it must be replaced
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# by a cell retrieved from the child page (a leaf) of the deleted cell.
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# This will fail, as the block modified the database image so that the
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# child page of the deleted cell is from a table (intkey) b-tree, not an
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# index b-tree as expected. At one point this was causing an assert()
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# to fail.
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catchsql { DELETE FROM t1 WHERE rowid = 3 }
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} {1 {database disk image is malformed}}
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do_test corrupt-5.1 {
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db close
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forcedelete test.db test.db-journal
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sqlite3 db test.db
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execsql { PRAGMA page_size = 1024 }
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set ct "CREATE TABLE t1(c0 "
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set i 0
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while {[string length $ct] < 950} { append ct ", c[incr i]" }
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append ct ")"
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execsql $ct
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} {}
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do_test corrupt-5.2 {
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db close
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hexio_write test.db 108 00000000
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sqlite3 db test.db
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catchsql { SELECT * FROM sqlite_master }
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} {1 {database disk image is malformed}}
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# At one point, the specific corruption caused by this test case was
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# causing a buffer overwrite. Although a crash was never demonstrated,
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# running this testcase under valgrind revealed the problem.
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do_test corrupt-6.1 {
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db close
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forcedelete test.db test.db-journal
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sqlite3 db test.db
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execsql {
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PRAGMA page_size = 1024; CREATE TABLE t1(x);
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}
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# The root page of t1 is 1024 bytes in size. The header is 8 bytes, and
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# each of the cells inserted by the following INSERT statements consume
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# 16 bytes (including the 2 byte cell-offset array entry). So the page
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# can contain up to 63 cells.
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for {set i 0} {$i < 63} {incr i} {
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execsql { INSERT INTO t1 VALUES( randomblob(10) ) }
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}
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# Free the cell stored right at the end of the page (at offset pgsz-14).
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execsql { DELETE FROM t1 WHERE rowid=1 }
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set rootpage [db one {SELECT rootpage FROM sqlite_master WHERE name = 't1'}]
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db close
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set offset [expr ($rootpage * 1024)-14+2]
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hexio_write test.db $offset 00FF
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sqlite3 db test.db
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catchsql { INSERT INTO t1 VALUES( randomblob(10) ) }
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} {1 {database disk image is malformed}}
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ifcapable oversize_cell_check {
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db close
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forcedelete test.db test.db-journal
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sqlite3 db test.db
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execsql {
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PRAGMA page_size = 1024; CREATE TABLE t1(x);
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}
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do_test corrupt-7.1 {
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for {set i 0} {$i < 39} {incr i} {
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execsql {
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INSERT INTO t1 VALUES(X'000100020003000400050006000700080009000A');
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}
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}
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} {}
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db close
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# Corrupt the root page of table t1 so that the first offset in the
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# cell-offset array points to the data for the SQL blob associated with
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# record (rowid=10). The root page still passes the checks in btreeInitPage(),
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# because the start of said blob looks like the start of a legitimate
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# page cell.
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#
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# Test case cc-2 overwrites the blob so that it no longer looks like a
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# real cell. But, by the time it is overwritten, btreeInitPage() has already
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# initialized the root page, so no corruption is detected.
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#
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# Test case cc-3 inserts an extra record into t1, forcing balance-deeper
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# to run. After copying the contents of the root page to the new child,
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# btreeInitPage() is called on the child. This time, it detects corruption
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# (because the start of the blob associated with the (rowid=10) record
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# no longer looks like a real cell). At one point the code assumed that
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# detecting corruption was not possible at that point, and an assert() failed.
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#
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set fd [open test.db r+]
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fconfigure $fd -translation binary -encoding binary
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seek $fd [expr 1024+8]
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puts -nonewline $fd "\x03\x14"
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close $fd
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sqlite3 db test.db
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do_test corrupt-7.2 {
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execsql {
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UPDATE t1 SET x = X'870400020003000400050006000700080009000A'
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WHERE rowid = 10;
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}
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} {}
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do_test corrupt-7.3 {
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catchsql {
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INSERT INTO t1 VALUES(X'000100020003000400050006000700080009000A');
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}
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} {1 {database disk image is malformed}}
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}
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db close
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forcedelete test.db test.db-journal
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do_test corrupt-8.1 {
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sqlite3 db test.db
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execsql {
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PRAGMA page_size = 1024;
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PRAGMA secure_delete = on;
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PRAGMA auto_vacuum = 0;
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CREATE TABLE t1(x INTEGER PRIMARY KEY, y);
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INSERT INTO t1 VALUES(5, randomblob(1900));
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}
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hexio_write test.db 2044 [hexio_render_int32 2]
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hexio_write test.db 24 [hexio_render_int32 45]
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catchsql { INSERT OR REPLACE INTO t1 VALUES(5, randomblob(1900)) }
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} {1 {database disk image is malformed}}
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db close
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forcedelete test.db test.db-journal
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do_test corrupt-8.2 {
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sqlite3 db test.db
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execsql {
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PRAGMA page_size = 1024;
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PRAGMA secure_delete = on;
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PRAGMA auto_vacuum = 0;
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CREATE TABLE t1(x INTEGER PRIMARY KEY, y);
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INSERT INTO t1 VALUES(5, randomblob(900));
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INSERT INTO t1 VALUES(6, randomblob(900));
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}
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hexio_write test.db 2047 FF
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hexio_write test.db 24 [hexio_render_int32 45]
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catchsql { INSERT INTO t1 VALUES(4, randomblob(1900)) }
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} {1 {database disk image is malformed}}
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finish_test
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