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. It creates a base
15 # data base file, then tests that single byte corruptions in
16 # increasingly larger quantities are handled gracefully.
18 # $Id: corruptC.test,v 1.14 2009/07/11 06:55:34 danielk1977 Exp $
20 catch {forcedelete test.db test.db-journal test.bu}
22 set testdir [file dirname $argv0]
23 source $testdir/tester.tcl
25 # Do not use a codec for tests in this file, as the database file is
26 # manipulated directly using tcl scripts (using the [hexio_write] command).
30 # These tests deal with corrupt database files
32 database_may_be_corrupt
34 # Construct a compact, dense database for testing.
36 do_test corruptC-1.1 {
38 PRAGMA auto_vacuum = 0;
39 PRAGMA legacy_file_format=1;
42 INSERT INTO t1 VALUES(1,1);
43 INSERT OR IGNORE INTO t1 SELECT x*2,y FROM t1;
44 INSERT OR IGNORE INTO t1 SELECT x*3,y FROM t1;
45 INSERT OR IGNORE INTO t1 SELECT x*5,y FROM t1;
46 INSERT OR IGNORE INTO t1 SELECT x*7,y FROM t1;
47 INSERT OR IGNORE INTO t1 SELECT x*11,y FROM t1;
48 INSERT OR IGNORE INTO t1 SELECT x*13,y FROM t1;
49 CREATE INDEX t1i1 ON t1(x);
50 CREATE TABLE t2 AS SELECT x,2 as y FROM t1 WHERE rowid%5!=0;
55 ifcapable {integrityck} {
56 integrity_check corruptC-1.2
59 # Generate random integer
62 return [expr {round(rand()*$range)}]
65 # Setup for the tests. Make a backup copy of the good database in test.bu.
68 forcecopy test.db test.bu
70 set fsize [file size test.db]
72 # Set a quasi-random random seed.
73 if {[info exists ::G(issoak)]} {
74 # If we are doing SOAK tests, we want a different
75 # random seed for each run. Ideally we would like
76 # to use [clock clicks] or something like that here.
77 set qseed [file mtime test.db]
79 # If we are not doing soak tests,
86 # First test some specific corruption tests found from earlier runs
87 # with specific seeds.
90 # test that a corrupt content offset size is handled (seed 5577)
91 do_test corruptC-2.1 {
93 forcecopy test.bu test.db
95 # insert corrupt byte(s)
96 hexio_write test.db 2053 [format %02x 0x04]
99 catchsql {PRAGMA integrity_check}
100 } {1 {database disk image is malformed}}
102 # test that a corrupt content offset size is handled (seed 5649)
104 # Update 2016-12-27: As of check-in [0b86fbca66] "In sqlite3BtreeInsert() when
105 # replacing a re-existing row, try to overwrite the cell directly rather than
106 # deallocate and reallocate the cell" on 2016-12-09, this test case no longer
107 # detects the offset size problem during the UPDATE. We have to run a subsequent
108 # integrity_check to see it.
109 do_test corruptC-2.2 {
111 forcecopy test.bu test.db
113 # insert corrupt byte(s)
114 hexio_write test.db 27 [format %02x 0x08]
115 hexio_write test.db 233 [format %02x 0x6a]
116 hexio_write test.db 328 [format %02x 0x67]
117 hexio_write test.db 750 [format %02x 0x1f]
118 hexio_write test.db 1132 [format %02x 0x52]
119 hexio_write test.db 1133 [format %02x 0x84]
120 hexio_write test.db 1220 [format %02x 0x01]
121 hexio_write test.db 3688 [format %02x 0xc1]
122 hexio_write test.db 3714 [format %02x 0x58]
123 hexio_write test.db 3746 [format %02x 0x9a]
126 db eval {UPDATE t1 SET y=1}
127 db eval {PRAGMA integrity_check}
128 } {/Offset .* out of range/}
130 # test that a corrupt free cell size is handled (seed 13329)
131 do_test corruptC-2.3 {
133 forcecopy test.bu test.db
135 # insert corrupt byte(s)
136 hexio_write test.db 1094 [format %02x 0x76]
139 catchsql {UPDATE t1 SET y=1}
140 } {1 {database disk image is malformed}}
142 # test that a corrupt free cell size is handled (seed 169571)
143 do_test corruptC-2.4 {
145 forcecopy test.bu test.db
147 # insert corrupt byte(s)
148 hexio_write test.db 3119 [format %02x 0xdf]
151 catchsql {UPDATE t2 SET y='abcdef-uvwxyz'}
152 } {1 {database disk image is malformed}}
154 # test that a corrupt free cell size is handled (seed 169571)
155 do_test corruptC-2.5 {
157 forcecopy test.bu test.db
159 # insert corrupt byte(s)
160 hexio_write test.db 3119 [format %02x 0xdf]
161 hexio_write test.db 4073 [format %02x 0xbf]
164 catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
165 catchsql {PRAGMA integrity_check}
166 } {0 {{*** in database main ***
167 On tree page 4 cell 19: Extends off end of page} {database disk image is malformed}}}
169 # {0 {{*** in database main ***
170 # Corruption detected in cell 710 on page 4
171 # Multiple uses for byte 661 of page 4
172 # Fragmented space is 249 byte reported as 21 on page 4}}}
174 # test that a corrupt free cell size is handled (seed 169595)
175 do_test corruptC-2.6 {
177 forcecopy test.bu test.db
179 # insert corrupt byte(s)
180 hexio_write test.db 619 [format %02x 0xe2]
181 hexio_write test.db 3150 [format %02x 0xa8]
184 catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
185 } {1 {database disk image is malformed}}
187 # corruption (seed 178692)
188 do_test corruptC-2.7 {
190 forcecopy test.bu test.db
192 # insert corrupt byte(s)
193 hexio_write test.db 3074 [format %02x 0xa0]
196 catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
197 } {1 {database disk image is malformed}}
200 # corruption (seed 179069)
201 # Obsolete. With single-pass DELETE the corruption in the
202 # main database is not detected.
204 do_test corruptC-2.8 {
206 forcecopy test.bu test.db
208 # insert corrupt byte(s)
209 hexio_write test.db 1393 [format %02x 0x7d]
210 hexio_write test.db 84 [format %02x 0x19]
211 hexio_write test.db 3287 [format %02x 0x3b]
212 hexio_write test.db 2564 [format %02x 0xed]
213 hexio_write test.db 2139 [format %02x 0x55]
216 catchsql {BEGIN; DELETE FROM t1 WHERE x>13; ROLLBACK;}
217 } {1 {database disk image is malformed}}
220 # corruption (seed 170434)
222 # UPDATE: Prior to 3.8.2, this used to return SQLITE_CORRUPT. It no longer
223 # does. That is Ok, the point of these tests is to verify that no buffer
224 # overruns or overreads can be caused by corrupt databases.
225 do_test corruptC-2.9 {
227 forcecopy test.bu test.db
229 # insert corrupt byte(s)
230 hexio_write test.db 2095 [format %02x 0xd6]
233 catchsql {BEGIN; DELETE FROM t1 WHERE x>13; ROLLBACK;}
236 # corruption (seed 186504)
237 do_test corruptC-2.10 {
239 forcecopy test.bu test.db
241 # insert corrupt byte(s)
242 hexio_write test.db 3130 [format %02x 0x02]
245 catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
246 } {1 {database disk image is malformed}}
248 # corruption (seed 1589)
249 do_test corruptC-2.11 {
251 forcecopy test.bu test.db
253 # insert corrupt byte(s)
254 hexio_write test.db 55 [format %02x 0xa7]
257 catchsql {BEGIN; CREATE TABLE t3 AS SELECT x,3 as y FROM t2 WHERE rowid%5!=0; ROLLBACK;}
258 } {1 {database disk image is malformed}}
260 # corruption (seed 14166)
261 do_test corruptC-2.12 {
263 forcecopy test.bu test.db
265 # insert corrupt byte(s)
266 hexio_write test.db 974 [format %02x 0x2e]
269 catchsql {SELECT count(*) FROM sqlite_master;}
270 } {1 {malformed database schema (t1i1) - corrupt database}}
272 # corruption (seed 218803)
273 do_test corruptC-2.13 {
275 forcecopy test.bu test.db
277 # insert corrupt byte(s)
278 hexio_write test.db 102 [format %02x 0x12]
281 catchsql {BEGIN; CREATE TABLE t3 AS SELECT x,3 as y FROM t2 WHERE rowid%5!=0; ROLLBACK;}
282 } {1 {database disk image is malformed}}
284 do_test corruptC-2.14 {
286 forcecopy test.bu test.db
289 set blob [string repeat abcdefghij 10000]
290 execsql { INSERT INTO t1 VALUES (1, $blob) }
293 set filesize [file size test.db]
294 hexio_write test.db [expr $filesize-2048] 00000001
295 catchsql {DELETE FROM t1 WHERE rowid = (SELECT max(rowid) FROM t1)}
296 } {1 {database disk image is malformed}}
298 # At one point this particular corrupt database was causing a buffer
299 # overread. Which caused a crash in a run of all.test once.
301 do_test corruptC-2.15 {
303 forcecopy test.bu test.db
304 hexio_write test.db 986 b9
306 catchsql {SELECT count(*) FROM sqlite_master;}
307 } {1 {database disk image is malformed}}
310 # Now test for a series of quasi-random seeds.
311 # We loop over the entire file size and touch
312 # each byte at least once.
313 for {set tn 0} {$tn<$fsize} {incr tn 1} {
317 forcecopy test.bu test.db
320 # Seek to a random location in the file, and write a random single byte
321 # value. Then do various operations on the file to make sure that
322 # the database engine can handle the corruption gracefully.
325 for {set i 1} {$i<=512 && !$last} {incr i 1} {
329 # on the first corrupt value, use location $tn
330 # this ensures that we touch each location in the
331 # file at least once.
334 # insert random byte at random location
335 set roffset [random $fsize]
337 set rbyte [format %02x [random 255]]
339 # You can uncomment the following to have it trace
340 # exactly how it's corrupting the file. This is
341 # useful for generating the "seed specific" tests
343 # set rline "$roffset $rbyte"
346 hexio_write test.db $roffset $rbyte
349 # do a few random operations to make sure that if
350 # they error, they error gracefully instead of crashing.
351 do_test corruptC-3.$tn.($qseed).$i.1 {
352 catchsql {SELECT count(*) FROM sqlite_master}
355 do_test corruptC-3.$tn.($qseed).$i.2 {
356 catchsql {SELECT count(*) FROM t1}
359 do_test corruptC-3.$tn.($qseed).$i.3 {
360 catchsql {SELECT count(*) FROM t1 WHERE x>13}
363 do_test corruptC-3.$tn.($qseed).$i.4 {
364 catchsql {SELECT count(*) FROM t2}
367 do_test corruptC-3.$tn.($qseed).$i.5 {
368 catchsql {SELECT count(*) FROM t2 WHERE x<13}
371 do_test corruptC-3.$tn.($qseed).$i.6 {
372 catchsql {BEGIN; UPDATE t1 SET y=1; ROLLBACK;}
375 do_test corruptC-3.$tn.($qseed).$i.7 {
376 catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
379 do_test corruptC-3.$tn.($qseed).$i.8 {
380 catchsql {BEGIN; DELETE FROM t1 WHERE x>13; ROLLBACK;}
383 do_test corruptC-3.$tn.($qseed).$i.9 {
384 catchsql {BEGIN; DELETE FROM t2 WHERE x<13; ROLLBACK;}
387 do_test corruptC-3.$tn.($qseed).$i.10 {
388 catchsql {BEGIN; CREATE TABLE t3 AS SELECT x,3 as y FROM t2 WHERE rowid%5!=0; ROLLBACK;}
392 # check the integrity of the database.
393 # once the corruption is detected, we can stop.
394 ifcapable {integrityck} {
395 set res [ catchsql {PRAGMA integrity_check} ]
396 set ans [lindex $res 1]
397 if { [ string compare $ans "ok" ] != 0 } {
401 # if we are not capable of doing an integrity check,
402 # stop after corrupting 5 bytes.
403 ifcapable {!integrityck} {
409 # Check that no page references were leaked.
410 # TBD: need to figure out why this doesn't work
411 # work with ROLLBACKs...
413 do_test corruptC-3.$tn.($qseed).$i.11 {
414 set bt [btree_from_db db]
416 array set stats [btree_pager_stats $bt]