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upstream: Plug mem addrinfo mem leaks. 

Prevent mem leaks in the (unlikely) event that getaddrinfo returns
no addresses.  ALso, remove an unneeded NULL check in addr_ntop. From
khaleesicodes via github PR#281, ok deraadt@

OpenBSD-Commit-ID: e8a5afc686376637c355c5f7e122dc4b080b9c1a
This commit is contained in:
dtucker@openbsd.org 2021-10-22 10:51:57 +00:00 committed by Darren Tucker
parent 27c8c343b6
commit 22b2681d88
1 changed files with 17 additions and 5 deletions
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22
addr.c
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@ -1,4 +1,4 @@
/* $OpenBSD: addr.c,v 1.3 2021/10/22 09:22:04 dtucker Exp $ */
/* $OpenBSD: addr.c,v 1.4 2021/10/22 10:51:57 dtucker Exp $ */
/*
* Copyright (c) 2004-2008 Damien Miller <djm@mindrot.org>
@ -312,9 +312,14 @@ addr_pton(const char *p, struct xaddr *n)
if (p == NULL || getaddrinfo(p, NULL, &hints, &ai) != 0)
return -1;
if (ai == NULL || ai->ai_addr == NULL)
if (ai == NULL)
return -1;
if (ai->ai_addr == NULL) {
freeaddrinfo(ai);
return -1;
}
if (n != NULL && addr_sa_to_xaddr(ai->ai_addr, ai->ai_addrlen,
n) == -1) {
freeaddrinfo(ai);
@ -336,12 +341,19 @@ addr_sa_pton(const char *h, const char *s, struct sockaddr *sa, socklen_t slen)
if (h == NULL || getaddrinfo(h, s, &hints, &ai) != 0)
return -1;
if (ai == NULL || ai->ai_addr == NULL)
if (ai == NULL)
return -1;
if (ai->ai_addr == NULL) {
freeaddrinfo(ai);
return -1;
}
if (sa != NULL) {
if (slen < ai->ai_addrlen)
if (slen < ai->ai_addrlen) {
freeaddrinfo(ai);
return -1;
}
memcpy(sa, &ai->ai_addr, ai->ai_addrlen);
}
@ -357,7 +369,7 @@ addr_ntop(const struct xaddr *n, char *p, size_t len)
if (addr_xaddr_to_sa(n, _SA(&ss), &slen, 0) == -1)
return -1;
if (n == NULL || p == NULL || len == 0)
if (p == NULL || len == 0)
return -1;
if (getnameinfo(_SA(&ss), slen, p, len, NULL, 0,
NI_NUMERICHOST) == -1)