Headline
CVE-2022-2287: patch 9.0.0021: invalid memory access when adding word to spell word … · vim/vim@5e59ea5
Out-of-bounds Read in GitHub repository vim/vim prior to 9.0.
@@ -4366,6 +4366,23 @@ wordtree_alloc(spellinfo_T *spin)
return (wordnode_T *)getroom(spin, sizeof(wordnode_T), TRUE);
}
/*
* Return TRUE if “word” contains valid word characters.
* Control characters and trailing ‘/’ are invalid. Space is OK.
*/
static int
valid_spell_word(char_u *word)
{
char_u *p;
if (enc_utf8 && !utf_valid_string(word, NULL))
return FALSE;
for (p = word; *p != NUL; p += mb_ptr2len§)
if (*p < ' ' || (p[0] == ‘/’ && p[1] == NUL))
return FALSE;
return TRUE;
}
/*
* Store a word in the tree(s).
* Always store it in the case-folded tree. For a keep-case word this is
@@ -4391,7 +4408,7 @@ store_word(
char_u *p;
// Avoid adding illegal bytes to the word tree.
if (enc_utf8 && !utf_valid_string(word, NULL))
if (!valid_spell_word(word))
return FAIL;
(void)spell_casefold(curwin, word, len, foldword, MAXWLEN);
@@ -6194,7 +6211,7 @@ spell_add_word(
int i;
char_u *spf;
if (enc_utf8 && !utf_valid_string(word, NULL))
if (!valid_spell_word(word))
{
emsg(_(e_illegal_character_in_word));
return;
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