From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Fri, 15 Oct 2021 01:06:25 +0000 (+0900)
Subject: network: route: fix possible overflow in conversion usec_t -> uint32_t
X-Git-Tag: v250-rc1~470^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ff43dddab7260c9220eaea2a545514772c0e581f;p=thirdparty%2Fsystemd.git

network: route: fix possible overflow in conversion usec_t -> uint32_t
---

diff --git a/src/network/networkd-route.c b/src/network/networkd-route.c
index f7ef657bcaa..767f47a8b4c 100644
--- a/src/network/networkd-route.c
+++ b/src/network/networkd-route.c
@@ -1391,7 +1391,7 @@ static int route_configure(
 
         if (route->lifetime != USEC_INFINITY && kernel_route_expiration_supported()) {
                 r = sd_netlink_message_append_u32(req, RTA_EXPIRES,
-                        DIV_ROUND_UP(usec_sub_unsigned(route->lifetime, now(clock_boottime_or_monotonic())), USEC_PER_SEC));
+                        MIN(DIV_ROUND_UP(usec_sub_unsigned(route->lifetime, now(clock_boottime_or_monotonic())), USEC_PER_SEC), UINT32_MAX));
                 if (r < 0)
                         return log_link_error_errno(link, r, "Could not append RTA_EXPIRES attribute: %m");
         }