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authorEric Dumazet <edumazet@google.com>2019-11-05 14:11:54 -0800
committerDavid S. Miller <davem@davemloft.net>2019-11-06 16:14:48 -0800
commit099ecf59f05b5f30f42ebac0ab8cb94f9b18c90c (patch)
tree06d62b7b24635bbb78ad38f24933cad260b5c346 /net/ipv4/af_inet.c
parentnet: annotate lockless accesses to sk->sk_ack_backlog (diff)
downloadlinux-dev-099ecf59f05b5f30f42ebac0ab8cb94f9b18c90c.tar.xz
linux-dev-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/af_inet.c')
-rw-r--r--net/ipv4/af_inet.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 70f92aaca411..53de8e00990e 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -208,7 +208,7 @@ int inet_listen(struct socket *sock, int backlog)
if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN)))
goto out;
- sk->sk_max_ack_backlog = backlog;
+ WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
/* Really, if the socket is already in listen state
* we can only allow the backlog to be adjusted.
*/