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uid-range: add some overflow checks

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This commit is contained in:
Lennart Poettering 2022-03-31 14:28:00 +02:00
parent 5674aa7a2c
commit 0a5c6a57c6
1 changed files with 6 additions and 0 deletions
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6
src/shared/uid-range.c
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@ -69,6 +69,9 @@ int uid_range_add(UidRange **p, size_t *n, uid_t start, uid_t nr) {
if (nr <= 0)
return 0;
if (start > UINT32_MAX - nr) /* overflow check */
return -ERANGE;
for (size_t i = 0; i < *n; i++) {
x = (*p) + i;
if (uid_range_intersect(x, start, nr)) {
@ -149,6 +152,9 @@ int uid_range_next_lower(const UidRange *p, size_t n, uid_t *uid) {
assert(p);
assert(uid);
if (*uid == 0)
return -EBUSY;
candidate = *uid - 1;
for (size_t i = 0; i < n; i++) {