Commit88b6bc4

Artur Zakirov

committed

Fix possible subtraction overflow

1 parent284ecc4 commit88b6bc4Copy full SHA for 88b6bc4

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-2

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-2

lines changed

Lines changed: 5 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -724,6 +724,7 @@ dataPlaceToPage(RumBtree btree, Page page, OffsetNumber off)`
`724`	`724`	`DatumaddInfo=0;`
`725`	`725`	`booladdInfoIsNull= false;`
`726`	`726`	`intmaxoff=RumPageGetOpaque(page)->maxoff;`
	`727`	`+intfreespace;`
`727`	`728`
`728`	`729`	`/*`
`729`	`730`	`* We're going to prevent var-byte re-encoding of whole page.`
`@@ -760,7 +761,8 @@ dataPlaceToPage(RumBtree btree, Page page, OffsetNumber off)`
`760`	`761`	`&btree->items[j],btree->addInfo[j],btree->addInfoIsNull[j],`
`761`	`762`	`&iptr,btree->rumstate,ptr-page);`
`762`	`763`
`763`		`-if (RumDataPageFreeSpacePre(page,ptr2)<0)`
	`764`	`+freespace=RumDataPageFreeSpacePre(page,ptr2);`
	`765`	`+if (freespace<0)`
`764`	`766`	`break;`
`765`	`767`
`766`	`768`	`ptr=rumPlaceToDataPageLeaf(ptr,btree->entryAttnum,`
`@@ -790,7 +792,8 @@ dataPlaceToPage(RumBtree btree, Page page, OffsetNumber off)`
`790`	`792`
`791`	`793`	`RumPageGetOpaque(page)->maxoff+=i;`
`792`	`794`
`793`		`-if (RumDataPageFreeSpacePre(page,ptr)<0)`
	`795`	`+freespace=RumDataPageFreeSpacePre(page,ptr);`
	`796`	`+if (freespace<0)`
`794`	`797`	`elog(ERROR,"Not enough of space in leaf page!");`
`795`	`798`
`796`	`799`	`/* Update indexes in the end of page */`

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