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ext/session/sessionbig2.test

61 строка1 KB

drh

Fix both a buffer overread and overwrite in the sessions rebase module.

26 июн 2026, 18:17

26 июн 2026, 18:17e151b6e

# 2026 June 26
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
#
# This file implements regression tests for sessions SQLite extension.
#

if {![info exists testdir]} {
  set testdir [file join [file dirname [info script]] .. .. test]
} 
source [file join [file dirname [info script]] session_common.tcl]
source $testdir/tester.tcl
ifcapable !session {finish_test; return}

if {[permutation]=="session_strm" || [permutation]=="session_eec"} {
  finish_test
  return
}

if {$::tcl_platform(pointerSize)<8} {
  finish_test
  return
}

set testprefix sessionbig2

foreach {tn sz} {
  1 1000
  2 1073741820
} {
  reset_db

  set big [string repeat A $sz]

  do_execsql_test 1.$tn.0 {
    CREATE TABLE t(pk BLOB PRIMARY KEY);
    INSERT INTO t VALUES($big);
  }
  set D [changeset_from_sql { DELETE FROM t WHERE 1 }]
  do_execsql_test 1.$tn.1 {
    DROP TABLE t;
    CREATE TABLE t(pk BLOB PRIMARY KEY, v INT);
    INSERT INTO t VALUES($big, 1);
  }
  set U [changeset_from_sql { UPDATE t SET v=2 WHERE 1 }]
  do_test 1.$tn.2 {
    sqlite3rebaser_create R
    R configure $D
    R rebase $U
    R delete
  } {}
}

finish_test