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1 office 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  
19 set testdir [file dirname $argv0]
20 source $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 #
25 do_not_use_codec
26  
27 # We must have the page_size pragma for these tests to work.
28 #
29 ifcapable !pager_pragmas {
30 finish_test
31 return
32 }
33  
34 # Create a simple, small database.
35 #
36 do_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 #
53 do_test corrupt7-1.2 {
54 hexio_get_int [hexio_read test.db 16 2]
55 } 1024 ;# The page size is 1024
56 do_test corrupt7-1.3 {
57 hexio_get_int [hexio_read test.db 20 1]
58 } 0 ;# Unused bytes per page is 0
59  
60 integrity_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 #
68 ifcapable 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 ***
75 Page 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 ***
82 Page 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 ***
90 Corruption 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 ***
97 On 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  
130 finish_test