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]
Message-Id: <20240423223919.3385493-7-pablo@netfilter.org>
Date: Wed, 24 Apr 2024 00:39:13 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	laforge@...ocom.org,
	pespin@...mocom.de,
	osmith@...mocom.de
Subject: [PATCH net-next 06/12] gtp: pass up link local traffic to userspace socket

According to TS 29.061, it is possible to see IPv6 link-local traffic in
the GTP tunnel, see 11.2.1.3.2 IPv6 Stateless Address Autoconfiguration
(IPv6 SLAAC).

Pass up these packets to the userspace daemon to handle them as control
GTP traffic.

Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
 drivers/net/gtp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index 2fde4f2268c5..2afcf1887592 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -250,6 +250,10 @@ static bool gtp_check_ms_ipv6(struct sk_buff *skb, struct pdp_ctx *pctx,
 
 	ip6h = (struct ipv6hdr *)(skb->data + hdrlen);
 
+	if ((ipv6_addr_type(&ip6h->saddr) & IPV6_ADDR_LINKLOCAL) ||
+	    (ipv6_addr_type(&ip6h->daddr) & IPV6_ADDR_LINKLOCAL))
+		return false;
+
 	if (role == GTP_ROLE_SGSN) {
 		ret = ipv6_pdp_addr_equal(&ip6h->daddr, &pctx->ms.addr6);
 	} else {
-- 
2.30.2


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ