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Overview
Comment:Fix a problem with corrupt fts3 database detection introduced by [27199380].
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Timelines: family | ancestors | descendants | both | branch-3.22
Files: files | file ages | folders
SHA3-256: ceeb4fba84a651ddd432e87a968ec8d928030bf5b32c8790188d0fb5787c1b4b
User & Date: dan 2018-12-26 14:23:14.887
Context
2019-09-03
18:04
Disable the undocumented rtreenode() SQL function that is only used for testing, except when doing a build that is specifically intended for testing. (check-in: 8452fd5499 user: drh tags: branch-3.22)
2018-12-26
14:23
Fix a problem with corrupt fts3 database detection introduced by [27199380]. (check-in: ceeb4fba84 user: dan tags: branch-3.22)
14:15
Fix a problem with corrupt fts3 database detection introduced by [95a9a39f]. (check-in: c80bb15b44 user: dan tags: trunk)
11:39
Avoid a left-shift of a negative value (undefined behaviour) when dealing with a corrupt database in fts3. Cherrypick of [b851d12474]. (check-in: 2fa63a8be6 user: dan tags: branch-3.22)
Changes
Unified Diff Ignore Whitespace Patch
Changes to ext/fts3/fts3_write.c.
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  pReader->aDoclist = pNext;
  pReader->pOffsetList = 0;

  /* Check that the doclist does not appear to extend past the end of the
  ** b-tree node. And that the final byte of the doclist is 0x00. If either 
  ** of these statements is untrue, then the data structure is corrupt.
  */
  if( pReader->nDoclist-(pReader->aDoclist-pReader->aNode) > pReader->nNode
   || (pReader->nPopulate==0 && pReader->aDoclist[pReader->nDoclist-1])
  ){
    return FTS_CORRUPT_VTAB;
  }
  return SQLITE_OK;
}









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  pReader->aDoclist = pNext;
  pReader->pOffsetList = 0;

  /* Check that the doclist does not appear to extend past the end of the
  ** b-tree node. And that the final byte of the doclist is 0x00. If either 
  ** of these statements is untrue, then the data structure is corrupt.
  */
  if( pReader->nDoclist > pReader->nNode-(pReader->aDoclist-pReader->aNode)
   || (pReader->nPopulate==0 && pReader->aDoclist[pReader->nDoclist-1])
  ){
    return FTS_CORRUPT_VTAB;
  }
  return SQLITE_OK;
}
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