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Improved detection of cells that extend into the reserved space at the end

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of the page while adjusting overflow page pointers during autovacuum.

FossilOrigin-Name: 8097712c9c1f4ea16bc5dd462da248ef98896061
This commit is contained in:
drh
2017-01-12 15:11:03 +00:00
parent 24be549329
commit b701c9a6c3
3 changed files with 15 additions and 13 deletions
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14
src/btree.c
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@@ -3356,12 +3356,14 @@ static int modifyPagePointer(MemPage *pPage, Pgno iFrom, Pgno iTo, u8 eType){
if( eType==PTRMAP_OVERFLOW1 ){
CellInfo info;
pPage->xParseCell(pPage, pCell, &info);
if( info.nLocal<info.nPayload
&& pCell+info.nSize-1<=pPage->aData+pPage->maskPage
&& iFrom==get4byte(pCell+info.nSize-4)
){
put4byte(pCell+info.nSize-4, iTo);
break;
if( info.nLocal<info.nPayload ){
if( pCell+info.nSize > pPage->aData+pPage->pBt->usableSize ){
return SQLITE_CORRUPT_BKPT;
}
if( iFrom==get4byte(pCell+info.nSize-4) ){
put4byte(pCell+info.nSize-4, iTo);
break;
}
}
}else{
if( get4byte(pCell)==iFrom ){