patch 9.1.1344: double free in f_complete_match() (after v9.1.1341)
Commit:
https://github.com/vim/vim/commit/3accf046ec3d0ee4a762d15452ae46596e1a0540
Author: Christian Brabandt <c...@256bit.org>
Date: Fri Apr 25 19:01:06 2025 +0200
patch 9.1.1344: double free in f_complete_match() (after v9.1.1341)
Problem: double free in f_complete_match() (after v9.1.1341)
Solution: remove additional free of trig pointer, correctly free
regmatch.regprog and before_cursor in the error case
closes: #17203
Signed-off-by: glepnir <glephun...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>
diff --git a/src/insexpand.c b/src/insexpand.c
index 77c98311d..94901f133 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -3592,7 +3592,6 @@ f_complete_match(typval_T *argvars, typval_T *rettv)
regmatch_T regmatch;
char_u *before_cursor = NULL;
char_u *cur_end = NULL;
- char_u *trig = NULL;
int bytepos = 0;
char_u part[MAXPATHL];
int ret;
@@ -3643,20 +3642,21 @@ f_complete_match(typval_T *argvars, typval_T *rettv)
{
if (vim_regexec_nl(®match, before_cursor, (colnr_T)0))
{
- bytepos = (int)(regmatch.startp[0] - before_cursor);
- trig = vim_strnsave(regmatch.startp[0],
+ char_u *trig = vim_strnsave(regmatch.startp[0],
regmatch.endp[0] - regmatch.startp[0]);
if (trig == NULL)
{
vim_free(before_cursor);
+ vim_regfree(regmatch.regprog);
return;
}
+ bytepos = (int)(regmatch.startp[0] - before_cursor);
ret = add_match_to_list(rettv, trig, -1, bytepos);
vim_free(trig);
if (ret == FAIL)
{
- vim_free(trig);
+ vim_free(before_cursor);
vim_regfree(regmatch.regprog);
return;
}
diff --git a/src/version.c b/src/version.c
index cd66bef57..1e8d8e350 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1344,
/**/
1343,
/**/
--
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