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calendarspec: use ADD_SAFE for repeat offset calculation

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Use overflow-safe ADD_SAFE() instead of raw addition when
computing the next matching calendar component with repeat.
On overflow, skip the component instead of using a bogus value.

CID#1548052

Follow-up for a2eb5ea79c
This commit is contained in:
Luca Boccassi
2026-03-28 21:56:41 +00:00
parent 1eb2bd5aaf
commit de2a7614f1
1 changed files with 2 additions and 3 deletions
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5
src/shared/calendarspec.c
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@@ -1149,9 +1149,8 @@ static int find_matching_component(
} else if (c->repeat > 0) {
int k;
k = start + ROUND_UP(*val - start, c->repeat);
if ((!d_set || k < d) && (stop < 0 || k <= stop)) {
if (ADD_SAFE(&k, start, ROUND_UP(*val - start, c->repeat)) &&
(!d_set || k < d) && (stop < 0 || k <= stop)) {
d = k;
d_set = true;
}