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dns-domain: make each label nul-terminated

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dns_label_unescape() does not nul-terminate the buffer if it does not
have enough space. Hence, if a lable is enough long, then strjoin()
triggers buffer-overflow.

Fixes #23705.
This commit is contained in:
Yu Watanabe
2022-06-11 06:01:46 +09:00
parent 288bafa952
commit 9db01ca5b0
2 changed files with 2 additions and 1 deletions
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src/test/test-dns-domain.c
+1
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@@ -540,6 +540,7 @@ TEST(dns_service_split) {
test_dns_service_split_one("_foo._bar", NULL, "_foo._bar", ".", 0);
test_dns_service_split_one("_meh._foo._bar", "_meh", "_foo._bar", ".", 0);
test_dns_service_split_one("Wuff\\032Wuff._foo._bar.waldo.com", "Wuff Wuff", "_foo._bar", "waldo.com", 0);
test_dns_service_split_one("_Q._Q-------------------------------------------------------------", NULL, "_Q._Q-------------------------------------------------------------", ".", 0);
}
static void test_dns_name_change_suffix_one(const char *name, const char *old_suffix, const char *new_suffix, int r, const char *result) {