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Overview
Comment:Fix a buffer overrun in the atomic multifile commit logic of the pager. (CVS 1556)
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SHA1: 3b78ffe0b5dfa20e5c638d85ed400afda8a9f948
User & Date: drh 2004-06-10 00:51:44
Context
2004-06-10
01:08
Tests in lock.test no conform to the new locking scheme. (CVS 1557) check-in: a60afd04 user: drh tags: trunk
00:51
Fix a buffer overrun in the atomic multifile commit logic of the pager. (CVS 1556) check-in: 3b78ffe0 user: drh tags: trunk
00:29
Check for schema updates if the parser fails to find a table. More locking test updates. (CVS 1555) check-in: a2228351 user: drh tags: trunk
Changes
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Changes to src/pager.c.

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** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.117 2004/06/09 20:03:09 drh Exp $
*/
#include "os.h"         /* Must be first to enable large file support */
#include "sqliteInt.h"
#include "pager.h"
#include <assert.h>
#include <string.h>

................................................................................
  if( rc ) goto end_playback;
  if( nMaster>0 ){
    zMaster = sqliteMalloc(nMaster);
    if( !zMaster ){
      rc = SQLITE_NOMEM;
      goto end_playback;
    }
    rc = sqlite3OsRead(&pPager->jfd, zMaster, pPager->nMaster);
    if( rc!=SQLITE_OK || (zMaster[0] && !sqlite3OsFileExists(zMaster)) ){
      goto end_playback;
    }
  }

  /* Truncate the database file back to it's original size */
  assert( pPager->origDbSize==0 || pPager->origDbSize==mxPg );







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805
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** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.118 2004/06/10 00:51:44 drh Exp $
*/
#include "os.h"         /* Must be first to enable large file support */
#include "sqliteInt.h"
#include "pager.h"
#include <assert.h>
#include <string.h>

................................................................................
  if( rc ) goto end_playback;
  if( nMaster>0 ){
    zMaster = sqliteMalloc(nMaster);
    if( !zMaster ){
      rc = SQLITE_NOMEM;
      goto end_playback;
    }
    rc = sqlite3OsRead(&pPager->jfd, zMaster, nMaster);
    if( rc!=SQLITE_OK || (zMaster[0] && !sqlite3OsFileExists(zMaster)) ){
      goto end_playback;
    }
  }

  /* Truncate the database file back to it's original size */
  assert( pPager->origDbSize==0 || pPager->origDbSize==mxPg );