netdev - [PATCH net-next 1/4] net: route: expire rt if the dst it holds is expired

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Thu,  7 Mar 2024 18:11:59 +0100
From: Leone Fernando <leone4fernando@...il.com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	dsahern@...nel.org,
	willemb@...gle.com
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Leone Fernando <leone4fernando@...il.com>
Subject: [PATCH net-next 1/4] net: route: expire rt if the dst it holds is expired

The function rt_is_expired is used to verify that a cached dst is valid.
Currently, this function ignores the rt.dst->expires value.

Add a check to rt_is_expired that validates that the dst is not expired.

Signed-off-by: Leone Fernando <leone4fernando@...il.com>
---
 net/ipv4/route.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index c8f76f56dc16..73e742424e97 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -392,7 +392,8 @@ static inline int ip_rt_proc_init(void)
 
 static inline bool rt_is_expired(const struct rtable *rth)
 {
-	return rth->rt_genid != rt_genid_ipv4(dev_net(rth->dst.dev));
+	return rth->rt_genid != rt_genid_ipv4(dev_net(rth->dst.dev)) ||
+	       (rth->dst.expires && time_after(jiffies, rth->dst.expires));
 }
 
 void rt_cache_flush(struct net *net)
-- 
2.34.1