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Enhance the sqlite3BtreeTransferRow() routine so that it does more careful

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checks for corrupt database pages.

FossilOrigin-Name: 85952e71175dae73c4e587a3b80783825d91fe8567a819e072da651c1ff4131b
This commit is contained in:
drh
2020-12-16 21:09:45 +00:00
parent e5baf5c283
commit 0a8b6a9f8f
4 changed files with 14 additions and 8 deletions
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6
src/btree.c
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@@ -8973,6 +8973,9 @@ int sqlite3BtreeTransferRow(BtCursor *pDest, BtCursor *pSrc, i64 iKey){
if( pDest->pKeyInfo==0 ) aOut += putVarint(aOut, iKey);
nIn = pSrc->info.nLocal;
aIn = pSrc->info.pPayload;
if( aIn+nIn>pSrc->pPage->aDataEnd ){
return SQLITE_CORRUPT_BKPT;
}
nRem = pSrc->info.nPayload;
if( nIn==nRem && nIn<pDest->pPage->maxLocal ){
memcpy(aOut, aIn, nIn);
@@ -8993,6 +8996,9 @@ int sqlite3BtreeTransferRow(BtCursor *pDest, BtCursor *pSrc, i64 iKey){
}
if( nRem>nIn ){
if( aIn+nIn+4>pSrc->pPage->aDataEnd ){
return SQLITE_CORRUPT_BKPT;
}
ovflIn = get4byte(&pSrc->info.pPayload[nIn]);
}