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patch 9.1.1734: Memory leak when allocating match fails

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Problem:  Memory leak when allocating match fails
Solution: Initialize m to NULL and centralize cleanup via goto fail to
          avoid leaks on early returns (Damien Lejay)

closes: #18204

Signed-off-by: Damien Lejay <damien@lejay.be>
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Damien Lejay
2025-09-05 17:29:31 +02:00
committed by Christian Brabandt
parent 4daf031253
commit 37e7728294
2 changed files with 13 additions and 10 deletions
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21
src/match.c
View File

@@ -21,7 +21,7 @@
* Add match to the match list of window "wp".
* If "pat" is not NULL the pattern will be highlighted with the group "grp"
* with priority "prio".
* If "pos_list" is not NULL the list of posisions defines the highlights.
* If "pos_list" is not NULL the list of positions defines the highlights.
* Optionally, a desired ID "id" can be specified (greater than or equal to 1).
* If no particular ID is desired, -1 must be specified for "id".
* Return ID of added match, -1 on failure.
@@ -38,7 +38,7 @@ match_add(
{
matchitem_T *cur;
matchitem_T *prev;
matchitem_T *m;
matchitem_T *m = NULL;
int hlg_id;
regprog_T *regprog = NULL;
int rtype = UPD_SOME_VALID;
@@ -86,15 +86,12 @@ match_add(
// Build new match.
m = ALLOC_CLEAR_ONE(matchitem_T);
if (m == NULL)
return -1;
goto fail;
if (pos_list != NULL && pos_list->lv_len > 0)
{
m->mit_pos_array = ALLOC_CLEAR_MULT(llpos_T, pos_list->lv_len);
if (m->mit_pos_array == NULL)
{
vim_free(m);
return -1;
}
goto fail;
m->mit_pos_count = pos_list->lv_len;
}
m->mit_id = id;
@@ -213,9 +210,13 @@ match_add(
return id;
fail:
vim_free(m->mit_pattern);
vim_free(m->mit_pos_array);
vim_free(m);
vim_regfree(regprog);
if (m != NULL)
{
vim_free(m->mit_pattern);
vim_free(m->mit_pos_array);
vim_free(m);
}
return -1;
}

2
src/version.c
View File

@@ -724,6 +724,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
1734,
/**/
1733,
/**/