1# 2008 June 11 2# 3# The author disclaims copyright to this source code. In place of 4# a legal notice, here is a blessing: 5# 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. 9# 10#*********************************************************************** 11# This file implements regression tests for SQLite library. 12# 13# This file implements tests to make sure SQLite does not crash or 14# segfault if it sees a corrupt database file. It specifically focuses 15# on corrupt cell offsets in a btree page. 16# 17# $Id: corrupt7.test,v 1.8 2009/08/10 10:18:08 danielk1977 Exp $ 18 19set testdir [file dirname $argv0] 20source $testdir/tester.tcl 21 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). 24# 25do_not_use_codec 26 27# We must have the page_size pragma for these tests to work. 28# 29ifcapable !pager_pragmas { 30 finish_test 31 return 32} 33 34# Create a simple, small database. 35# 36do_test corrupt7-1.1 { 37 execsql { 38 PRAGMA auto_vacuum=OFF; 39 PRAGMA page_size=1024; 40 CREATE TABLE t1(x); 41 INSERT INTO t1(x) VALUES(1); 42 INSERT INTO t1(x) VALUES(2); 43 INSERT INTO t1(x) SELECT x+2 FROM t1; 44 INSERT INTO t1(x) SELECT x+4 FROM t1; 45 INSERT INTO t1(x) SELECT x+8 FROM t1; 46 } 47 file size test.db 48} [expr {1024*2}] 49 50# Verify that the file format is as we expect. The page size 51# should be 1024 bytes. 52# 53do_test corrupt7-1.2 { 54 hexio_get_int [hexio_read test.db 16 2] 55} 1024 ;# The page size is 1024 56do_test corrupt7-1.3 { 57 hexio_get_int [hexio_read test.db 20 1] 58} 0 ;# Unused bytes per page is 0 59 60integrity_check corrupt7-1.4 61 62# Deliberately corrupt some of the cell offsets in the btree page 63# on page 2 of the database. 64# 65# The error message is different depending on whether or not the 66# SQLITE_ENABLE_OVERSIZE_CELL_CHECK compile-time option is engaged. 67# 68ifcapable oversize_cell_check { 69 do_test corrupt7-2.1 { 70 db close 71 hexio_write test.db 1062 FF 72 sqlite3 db test.db 73 db eval {PRAGMA integrity_check(1)} 74 } {{*** in database main *** 75Page 2: btreeInitPage() returns error code 11}} 76 do_test corrupt7-2.2 { 77 db close 78 hexio_write test.db 1062 04 79 sqlite3 db test.db 80 db eval {PRAGMA integrity_check(1)} 81 } {{*** in database main *** 82Page 2: btreeInitPage() returns error code 11}} 83} else { 84 do_test corrupt7-2.1 { 85 db close 86 hexio_write test.db 1062 FF 87 sqlite3 db test.db 88 db eval {PRAGMA integrity_check(1)} 89 } {{*** in database main *** 90Corruption detected in cell 15 on page 2}} 91 do_test corrupt7-2.2 { 92 db close 93 hexio_write test.db 1062 04 94 sqlite3 db test.db 95 db eval {PRAGMA integrity_check(1)} 96 } {{*** in database main *** 97On tree page 2 cell 15: Rowid 0 out of order (previous was 15)}} 98} 99 100# The code path that was causing the buffer overrun that this test 101# case was checking for was removed. 102# 103#do_test corrupt7-3.1 { 104# execsql { 105# DROP TABLE t1; 106# CREATE TABLE t1(a, b); 107# INSERT INTO t1 VALUES(1, 'one'); 108# INSERT INTO t1 VALUES(100, 'one hundred'); 109# INSERT INTO t1 VALUES(100000, 'one hundred thousand'); 110# CREATE INDEX i1 ON t1(b); 111# } 112# db close 113# 114# # Locate the 3rd cell in the index. 115# set cell_offset [hexio_get_int [hexio_read test.db [expr 1024*2 + 12] 2]] 116# incr cell_offset [expr 1024*2] 117# incr cell_offset 1 118# 119# # This write corrupts the "header-size" field of the database record 120# # stored in the index cell. At one point this was causing sqlite to 121# # reference invalid memory. 122# hexio_write test.db $cell_offset FFFF7F 123# 124# sqlite3 db test.db 125# catchsql { 126# SELECT b FROM t1 WHERE b > 'o' AND b < 'p'; 127# } 128#} {1 {database disk image is malformed}} 129 130finish_test 131