76 lines
2.0 KiB
Plaintext
76 lines
2.0 KiB
Plaintext
# 2013-08-01
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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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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix corruptG
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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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# Create a simple database with a single entry. Then corrupt the
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# header-size varint on the index payload so that it maps into a
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# negative number. Try to use the database.
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#
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do_execsql_test 1.1 {
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PRAGMA page_size=512;
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CREATE TABLE t1(a,b,c);
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INSERT INTO t1(rowid,a,b,c) VALUES(52,'abc','xyz','123');
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CREATE INDEX t1abc ON t1(a,b,c);
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}
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# Corrupt the file
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db close
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hexio_write test.db [expr {3*512 - 15}] 888080807f
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sqlite3 db test.db
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# Try to use the file.
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do_test 1.2 {
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catchsql {
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SELECT c FROM t1 WHERE a>'abc';
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}
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} {0 {}}
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do_test 1.3 {
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catchsql {
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PRAGMA integrity_check
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}
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} {0 ok}
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do_test 1.4 {
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catchsql {
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SELECT c FROM t1 ORDER BY a;
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}
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} {1 {database disk image is malformed}}
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# Corrupt the same file in a slightly different way. Make the record header
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# sane, but corrupt one of the serial_type value to indicate a huge payload
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# such that the payload begins in allocated space but overflows the buffer.
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#
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db close
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hexio_write test.db [expr {3*512-15}] 0513ff7f01
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sqlite3 db test.db
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do_test 2.1 {
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catchsql {
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SELECT rowid FROM t1 WHERE a='abc' and b='xyz123456789XYZ';
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}
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# The following test result is brittle. The point above is to try to
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# force a buffer overread by a corrupt database file. If we get an
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# incorrect answer from a corrupt database file, that is OK. If the
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# result below changes, that just means that "undefined behavior" has
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# changed.
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} {0 52}
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finish_test
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