netdev - [PATCH net 1/2] udp: add missing rehash callback to udplite

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-next>] [day] [month] [year] [list]

Message-Id: <1547655465-16133-1-git-send-email-alexey.kodanev@oracle.com>
Date:   Wed, 16 Jan 2019 19:17:44 +0300
From:   Alexey Kodanev <alexey.kodanev@...cle.com>
To:     netdev@...r.kernel.org
Cc:     Peter Oskolkov <posk@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        David Miller <davem@...emloft.net>,
        Alexey Kodanev <alexey.kodanev@...cle.com>
Subject: [PATCH net 1/2] udp: add missing rehash callback to udplite

After commit 4cdeeee9252a ("net: udp: prefer listeners bound to an
address"), UDP-Lite only works when specifying a local address for
the sockets.

This is related to the problem addressed in the commit 719f835853a9
("udp: add rehash on connect()"). Moreover, __udp4_lib_lookup() now
looks for a socket immediately in the secondary hash table.

The issue was found with LTP/network tests (UDP-Lite test-cases).

Signed-off-by: Alexey Kodanev <alexey.kodanev@...cle.com>
---
 net/ipv4/udp.c      | 2 +-
 net/ipv4/udp_impl.h | 1 +
 net/ipv4/udplite.c  | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 3fb0ed5..26d3a4c 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1918,7 +1918,7 @@ void udp_lib_rehash(struct sock *sk, u16 newhash)
 }
 EXPORT_SYMBOL(udp_lib_rehash);
 
-static void udp_v4_rehash(struct sock *sk)
+void udp_v4_rehash(struct sock *sk)
 {
 	u16 new_hash = ipv4_portaddr_hash(sock_net(sk),
 					  inet_sk(sk)->inet_rcv_saddr,
diff --git a/net/ipv4/udp_impl.h b/net/ipv4/udp_impl.h
index 3226726..6b2fa77 100644
--- a/net/ipv4/udp_impl.h
+++ b/net/ipv4/udp_impl.h
@@ -10,6 +10,7 @@
 int __udp4_lib_err(struct sk_buff *, u32, struct udp_table *);
 
 int udp_v4_get_port(struct sock *sk, unsigned short snum);
+void udp_v4_rehash(struct sock *sk);
 
 int udp_setsockopt(struct sock *sk, int level, int optname,
 		   char __user *optval, unsigned int optlen);
diff --git a/net/ipv4/udplite.c b/net/ipv4/udplite.c
index 39c7f17..3c94b8f 100644
--- a/net/ipv4/udplite.c
+++ b/net/ipv4/udplite.c
@@ -53,6 +53,7 @@ struct proto 	udplite_prot = {
 	.sendpage	   = udp_sendpage,
 	.hash		   = udp_lib_hash,
 	.unhash		   = udp_lib_unhash,
+	.rehash		   = udp_v4_rehash,
 	.get_port	   = udp_v4_get_port,
 	.memory_allocated  = &udp_memory_allocated,
 	.sysctl_mem	   = sysctl_udp_mem,
-- 
1.8.3.1