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vim-patch:8.2.4065: computation overflow with large cound for :yank

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Problem:    Computation overflow with large cound for :yank.
Solution:   Avoid an overflow.

3cf21b3051

Co-authored-by: Bram Moolenaar <Bram@vim.org>
This commit is contained in:
zeertzjq
2024-07-14 05:58:32 +08:00
parent 6276fce11e
commit 5531c95101
3 changed files with 16 additions and 7 deletions
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8
src/nvim/ex_docmd.c
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@@ -1411,7 +1411,11 @@ void set_cmd_count(exarg_T *eap, linenr_T count, bool validate)
}
} else {
eap->line1 = eap->line2;
eap->line2 += count - 1;
if (eap->line2 >= INT32_MAX - (count - 1)) {
eap->line2 = INT32_MAX;
} else {
eap->line2 += count - 1;
}
eap->addr_count++;
// Be vi compatible: no error message for out of range.
if (validate && eap->line2 > curbuf->b_ml.ml_line_count) {
@@ -1429,7 +1433,7 @@ static int parse_count(exarg_T *eap, const char **errormsg, bool validate)
if ((eap->argt & EX_COUNT) && ascii_isdigit(*eap->arg)
&& (!(eap->argt & EX_BUFNAME) || *(p = skipdigits(eap->arg + 1)) == NUL
|| ascii_iswhite(*p))) {
linenr_T n = getdigits_int32(&eap->arg, false, -1);
linenr_T n = getdigits_int32(&eap->arg, false, INT32_MAX);
eap->arg = skipwhite(eap->arg);
if (eap->args != NULL) {