[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20241014151247.1902637-8-stefan.wiehler@nokia.com>
Date: Mon, 14 Oct 2024 17:05:53 +0200
From: Stefan Wiehler <stefan.wiehler@...ia.com>
To: "David S . Miller" <davem@...emloft.net>,
David Ahern <dsahern@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
Stefan Wiehler <stefan.wiehler@...ia.com>
Subject: [PATCH net v5 07/10] ip6mr: Lock RCU before ip6mr_get_table() call in ip6_mroute_setsockopt()
When IPV6_MROUTE_MULTIPLE_TABLES is enabled, calls to ip6mr_get_table()
must be done under RCU or RTNL lock.
Fixes: d1db275dd3f6 ("ipv6: ip6mr: support multiple tables")
Signed-off-by: Stefan Wiehler <stefan.wiehler@...ia.com>
---
net/ipv6/ip6mr.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index ecb9e86fe45a..b54353bee2f8 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1668,7 +1668,9 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, sockptr_t optval,
inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
return -EOPNOTSUPP;
+ rcu_read_lock();
mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
+ rcu_read_unlock();
if (!mrt)
return -ENOENT;
--
2.42.0
Powered by blists - more mailing lists