From: dsahern@kernel.org
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, lberger@labn.net,
renato@opensourcerouting.org, David Ahern <dsahern@gmail.com>
Subject: [PATCH net] net/tcp: Fix socket lookups with SO_BINDTODEVICE
Date: Mon, 18 Jun 2018 12:30:37 -0700 [thread overview]
Message-ID: <20180618193037.3365-1-dsahern@kernel.org> (raw)
From: David Ahern <dsahern@gmail.com>
Similar to 69678bcd4d2d ("udp: fix SO_BINDTODEVICE"), TCP socket lookups
need to fail if dev_match is not true. Currently, a packet to a given port
can match a socket bound to device when it should not. In the VRF case,
this causes the lookup to hit a VRF socket and not a global socket
resulting in a response trying to go through the VRF when it should it.
Fixes: 3fa6f616a7a4d ("net: ipv4: add second dif to inet socket lookups")
Fixes: 4297a0ef08572 ("net: ipv6: add second dif to inet6 socket lookups")
Reported-by: Lou Berger <lberger@labn.net>
Diagnosed-by: Renato Westphal <renato@opensourcerouting.org>
Tested-by: Renato Westphal <renato@opensourcerouting.org>
Signed-off-by: David Ahern <dsahern@gmail.com>
---
net/ipv4/inet_hashtables.c | 4 ++--
net/ipv6/inet6_hashtables.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 31ff46daae97..3647167c8fa3 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -243,9 +243,9 @@ static inline int compute_score(struct sock *sk, struct net *net,
bool dev_match = (sk->sk_bound_dev_if == dif ||
sk->sk_bound_dev_if == sdif);
- if (exact_dif && !dev_match)
+ if (!dev_match)
return -1;
- if (sk->sk_bound_dev_if && dev_match)
+ if (sk->sk_bound_dev_if)
score += 4;
}
if (sk->sk_incoming_cpu == raw_smp_processor_id())
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 2febe26de6a1..595ad408dba0 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -113,9 +113,9 @@ static inline int compute_score(struct sock *sk, struct net *net,
bool dev_match = (sk->sk_bound_dev_if == dif ||
sk->sk_bound_dev_if == sdif);
- if (exact_dif && !dev_match)
+ if (!dev_match)
return -1;
- if (sk->sk_bound_dev_if && dev_match)
+ if (sk->sk_bound_dev_if)
score++;
}
if (sk->sk_incoming_cpu == raw_smp_processor_id())
--
2.11.0
next reply other threads:[~2018-06-18 19:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-18 19:30 dsahern [this message]
2018-06-19 23:04 ` [PATCH net] net/tcp: Fix socket lookups with SO_BINDTODEVICE David Miller
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=20180618193037.3365-1-dsahern@kernel.org \
--to=dsahern@kernel.org \
--cc=davem@davemloft.net \
--cc=dsahern@gmail.com \
--cc=lberger@labn.net \
--cc=netdev@vger.kernel.org \
--cc=renato@opensourcerouting.org \
/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;
as well as URLs for NNTP newsgroup(s).