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Mingli Yu
39ee281be1
Backport patches to fix CVE-2021-3927 and CVE-2021-3928. (From OE-Core rev: 41ba5054fc4d014ab3a2af0cc7673e275aaecee0) Signed-off-by: Mingli Yu <mingli.yu@windriver.com> Signed-off-by: Anuj Mittal <anuj.mittal@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
35 lines
1.0 KiB
Diff
35 lines
1.0 KiB
Diff
From ad7f7a3f81077ddfac451acd33ca049b9f2a5178 Mon Sep 17 00:00:00 2001
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From: Bram Moolenaar <Bram@vim.org>
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Date: Wed, 17 Nov 2021 11:22:21 +0800
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Subject: [PATCH] patch 8.2.3582: reading uninitialized memory when giving
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spell suggestions
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Problem: Reading uninitialized memory when giving spell suggestions.
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Solution: Check that preword is not empty.
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CVE: CVE-2021-3928
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Upstream-Status: Backport [https://github.com/vim/vim/commit/15d9890eee53afc61eb0a03b878a19cb5672f732]
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Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
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---
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src/spellsuggest.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/spellsuggest.c b/src/spellsuggest.c
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index 9d6df7930..88307b203 100644
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--- a/src/spellsuggest.c
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+++ b/src/spellsuggest.c
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@@ -1600,7 +1600,7 @@ suggest_trie_walk(
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// char, e.g., "thes," -> "these".
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p = fword + sp->ts_fidx;
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MB_PTR_BACK(fword, p);
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- if (!spell_iswordp(p, curwin))
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+ if (!spell_iswordp(p, curwin) && *preword != NUL)
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{
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p = preword + STRLEN(preword);
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MB_PTR_BACK(preword, p);
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--
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2.17.1
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