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[html parser] Check for integer overflow when computing new buffer sizes.

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Moonchild 2021-02-24 09:57:24 +00:00 • committed by roytam1
commit 5934c74a3f
7 changed files with 36 additions and 13 deletions
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3
parser/html/nsHtml5Portability.h
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@ -1,6 +1,6 @@
/*
* Copyright (c) 2008-2015 Mozilla Foundation
* Copyright (c) 2018-2020 Moonchild Productions
* Copyright (c) 2018-2021 Moonchild Productions
* Copyright (c) 2020 Binary Outcast
*
* Permission is hereby granted, free of charge, to any person obtaining a
@ -60,6 +60,7 @@ class nsHtml5StateSnapshot;
class nsHtml5Portability
{
public:
static int32_t checkedAdd(int32_t a, int32_t b);
static nsIAtom* newLocalNameFromBuffer(char16_t* buf, int32_t offset, int32_t length, nsHtml5AtomTable* interner);
static nsHtml5String newStringFromBuffer(char16_t* buf, int32_t offset, int32_t length, nsHtml5TreeBuilder* treeBuilder, bool maybeAtomize);
static nsHtml5String newEmptyString();