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| author |   Eric Dumazet <edumazet@google.com> | 2019-11-05 14:11:54 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-11-06 16:14:48 -0800 |
| commit | 099ecf59f05b5f30f42ebac0ab8cb94f9b18c90c (patch) | |
| tree | 06d62b7b24635bbb78ad38f24933cad260b5c346 /net/ipv4/inet_connection_sock.c | |
| parent | net: annotate lockless accesses to sk->sk_ack_backlog (diff) | |
| download | wireguard-linux-099ecf59f05b5f30f42ebac0ab8cb94f9b18c90c.tar.xz wireguard-linux-099ecf59f05b5f30f42ebac0ab8cb94f9b18c90c.zip | |
net: annotate lockless accesses to sk->sk_max_ack_backlog
sk->sk_max_ack_backlog can be read without any lock being held
at least in TCP/DCCP cases.
We need to use READ_ONCE()/WRITE_ONCE() to avoid load/store tearing
and/or potential KCSAN warnings.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/inet_connection_sock.c')
| -rw-r--r-- | net/ipv4/inet_connection_sock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index eb30fc1770de..e4c6e8b40490 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -716,7 +716,7 @@ static void reqsk_timer_handler(struct timer_list *t) * ones are about to clog our table. */ qlen = reqsk_queue_len(queue); - if ((qlen << 1) > max(8U, sk_listener->sk_max_ack_backlog)) { + if ((qlen << 1) > max(8U, READ_ONCE(sk_listener->sk_max_ack_backlog))) { int young = reqsk_queue_len_young(queue) << 1; while (thresh > 2) { |