diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-13 23:51:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-21 16:15:51 +0300 |
| commit | 1d9c81833dec46ccb52a1d0db970fefb7c4fa071 (patch) | |
| tree | 2790ca1ce1eda312883a692de6898503ab7c9b36 /include | |
| parent | 0de9b3f81e01a3804e14f7e9d30c66841bc31439 (diff) | |
| download | linux-1d9c81833dec46ccb52a1d0db970fefb7c4fa071.tar.xz | |
tcp: Fix data-races around sysctl_tcp_l3mdev_accept.
[ Upstream commit 08a75f10679470552a3a443f9aefd1399604d31d ]
While reading sysctl_tcp_l3mdev_accept, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its readers.
Fixes: 6dd9a14e92e5 ("net: Allow accepted sockets to be bound to l3mdev domain")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/inet_hashtables.h | 2 | ||||
| -rw-r--r-- | include/net/inet_sock.h | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h index 816851807fa8..1a3bf9726b75 100644 --- a/include/net/inet_hashtables.h +++ b/include/net/inet_hashtables.h @@ -201,7 +201,7 @@ static inline bool inet_sk_bound_dev_eq(struct net *net, int bound_dev_if, int dif, int sdif) { #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) - return inet_bound_dev_eq(!!net->ipv4.sysctl_tcp_l3mdev_accept, + return inet_bound_dev_eq(!!READ_ONCE(net->ipv4.sysctl_tcp_l3mdev_accept), bound_dev_if, dif, sdif); #else return inet_bound_dev_eq(true, bound_dev_if, dif, sdif); diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h index 886ed0950b7f..4908513c6dfb 100644 --- a/include/net/inet_sock.h +++ b/include/net/inet_sock.h @@ -121,7 +121,7 @@ static inline int inet_request_bound_dev_if(const struct sock *sk, #ifdef CONFIG_NET_L3_MASTER_DEV struct net *net = sock_net(sk); - if (!bound_dev_if && net->ipv4.sysctl_tcp_l3mdev_accept) + if (!bound_dev_if && READ_ONCE(net->ipv4.sysctl_tcp_l3mdev_accept)) return l3mdev_master_ifindex_by_index(net, skb->skb_iif); #endif @@ -133,7 +133,7 @@ static inline int inet_sk_bound_l3mdev(const struct sock *sk) #ifdef CONFIG_NET_L3_MASTER_DEV struct net *net = sock_net(sk); - if (!net->ipv4.sysctl_tcp_l3mdev_accept) + if (!READ_ONCE(net->ipv4.sysctl_tcp_l3mdev_accept)) return l3mdev_master_ifindex_by_index(net, sk->sk_bound_dev_if); #endif |