git: 82e4762f42a0 - main - route(8): Add null check for prefsrc option

The branch main has been updated by pouria:

URL: https://cgit.FreeBSD.org/src/commit/?id=82e4762f42a063785e5d19abcacd7e4a4eb3e548

commit 82e4762f42a063785e5d19abcacd7e4a4eb3e548
Author:     Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org>
AuthorDate: 2026-07-31 16:39:23 +0000
Commit:     Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org>
CommitDate: 2026-07-31 16:39:23 +0000

    route(8): Add null check for prefsrc option
    
    Reported by:    Shawn Webb <shawn.webb@hardenedbsd.org>, bms
    Fixes:  dd235f097af4 ("route(8): Add prefsrc option in netlink")
---
 sbin/route/route_netlink.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sbin/route/route_netlink.c b/sbin/route/route_netlink.c
index a412265b6feb..f145771ebb12 100644
--- a/sbin/route/route_netlink.c
+++ b/sbin/route/route_netlink.c
@@ -226,7 +226,8 @@ rtmsg_nl_int(struct nl_helper *h, int cmd, int rtm_flags, int fib, int rtm_addrs
 		rtm->rtm_flags = RTM_F_PREFIX;
 
 	snl_add_msg_attr_ip(&nw, RTA_DST, dst);
-	snl_add_msg_attr_ip(&nw, RTA_PREFSRC, prefsrc);
+	if (prefsrc != NULL)
+		snl_add_msg_attr_ip(&nw, RTA_PREFSRC, prefsrc);
 	snl_add_msg_attr_u32(&nw, RTA_TABLE, fib);
 
 	uint32_t rta_oif = 0;