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Earlier detection of out-of-range page numbers in the btree layer.

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FossilOrigin-Name: 805bb67a82be51dc6077480691ed815c63a37bd8fc00cf7e67e020349c6e322e
This commit is contained in:
drh
2020-07-28 20:32:12 +00:00
parent 6528bcdc80
commit 1024822ba8
3 changed files with 14 additions and 7 deletions
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7
src/btree.c
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@@ -6290,6 +6290,10 @@ static int freePage2(BtShared *pBt, MemPage *pMemPage, Pgno iPage){
u32 nLeaf; /* Initial number of leaf cells on trunk page */
iTrunk = get4byte(&pPage1->aData[32]);
if( iTrunk>btreePagecount(pBt) ){
rc = SQLITE_CORRUPT_BKPT;
goto freepage_out;
}
rc = btreeGetPage(pBt, iTrunk, &pTrunk, 0);
if( rc!=SQLITE_OK ){
goto freepage_out;
@@ -9127,6 +9131,9 @@ static int btreeCreateTable(Btree *p, Pgno *piTable, int createTabFlags){
** created so far, so the new root-page is (meta[3]+1).
*/
sqlite3BtreeGetMeta(p, BTREE_LARGEST_ROOT_PAGE, &pgnoRoot);
if( pgnoRoot>btreePagecount(pBt) ){
return SQLITE_CORRUPT_BKPT;
}
pgnoRoot++;
/* The new root-page may not be allocated on a pointer-map page, or the