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Earlier detection of corruption in sqlite3BtreeDelete().

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dbsqlfuzz a4c48c291d6e40157a1b749a05eaa7c7faf5a625.

FossilOrigin-Name: 978dc71c388b37740da38c310674315c7d7fe814d1daa16a146b4df71385d1e1
This commit is contained in:
drh
2023-04-02 16:43:20 +00:00
parent 756c6cf281
commit af33654533
4 changed files with 14 additions and 16 deletions
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5
src/btree.c
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@@ -7351,7 +7351,7 @@ static int rebuildPage(
assert( i<iEnd );
j = get2byte(&aData[hdr+5]);
if( j>(u32)usableSize ){ j = 0; }
if( NEVER(j>(u32)usableSize) ){ j = 0; }
memcpy(&pTmp[j], &aData[j], usableSize - j);
for(k=0; pCArray->ixNx[k]<=i && ALWAYS(k<NB*2); k++){}
@@ -9535,6 +9535,9 @@ int sqlite3BtreeDelete(BtCursor *pCur, u8 flags){
if( pPage->nFree<0 && btreeComputeFreeSpace(pPage) ){
return SQLITE_CORRUPT_BKPT;
}
if( pCell<&pPage->aCellIdx[pPage->nCell] ){
return SQLITE_CORRUPT_BKPT;
}
/* If the BTREE_SAVEPOSITION bit is on, then the cursor position must
** be preserved following this delete operation. If the current delete