From: Fernando Fernandez Mancera <fmancera@suse.de>
To: netdev@vger.kernel.org
Cc: sdf@fomichev.me, petrm@nvidia.com, idosch@nvidia.com,
razor@blackwall.org, pabeni@redhat.com, kuba@kernel.org,
edumazet@google.com, davem@davemloft.net, andrew+netdev@lunn.ch,
Fernando Fernandez Mancera <fmancera@suse.de>
Subject: [PATCH net-next] net: vxlan: check ipv6_mod_enabled() on neigh_reduce()
Date: Mon, 30 Mar 2026 14:10:33 +0200 [thread overview]
Message-ID: <20260330121033.4479-1-fmancera@suse.de> (raw)
IPv6 must be enabled or otherwise neigh_reduce() might cause a kernel
panic. This was prevented by a check on in6_dev. Use ipv6_mod_enabled()
instead as it is cleaner and also consistent with the code at
route_shortcircuit().
Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de>
---
drivers/net/vxlan/vxlan_core.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index b5fbd03418b6..b3b692c4b628 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -2027,13 +2027,11 @@ static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
struct vxlan_dev *vxlan = netdev_priv(dev);
const struct in6_addr *daddr;
const struct ipv6hdr *iphdr;
- struct inet6_dev *in6_dev;
struct neighbour *n;
struct nd_msg *msg;
rcu_read_lock();
- in6_dev = __in6_dev_get(dev);
- if (!in6_dev)
+ if (unlikely(!ipv6_mod_enabled()))
goto out;
iphdr = ipv6_hdr(skb);
--
2.53.0
reply other threads:[~2026-03-30 12:10 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260330121033.4479-1-fmancera@suse.de \
--to=fmancera@suse.de \
--cc=andrew+netdev@lunn.ch \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=idosch@nvidia.com \
--cc=kuba@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=petrm@nvidia.com \
--cc=razor@blackwall.org \
--cc=sdf@fomichev.me \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox