From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Mon, 3 Jun 2019 14:29:07 +0000 (+0900)
Subject: network: fix UBSAN issue
X-Git-Tag: v243-rc1~320
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3681d639353dbb5b976252f14b5ba42624c4562d;p=thirdparty%2Fsystemd.git

network: fix UBSAN issue

Closes #12724.
---

diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
index 600bad474dc..d6c6f5f2715 100644
--- a/src/network/networkd-address.c
+++ b/src/network/networkd-address.c
@@ -787,7 +787,7 @@ int config_parse_address(const char *unit,
         else
                 n->in_addr_peer = buffer;
 
-        if (n->family == AF_INET && n->broadcast.s_addr == 0)
+        if (n->family == AF_INET && n->broadcast.s_addr == 0 && n->prefixlen <= 30)
                 n->broadcast.s_addr = n->in_addr.in.s_addr | htonl(0xfffffffflu >> n->prefixlen);
 
         n = NULL;