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authorEric Dumazet <edumazet@google.com>2019-11-05 23:11:53 +0100
committerDavid S. Miller <davem@davemloft.net>2019-11-07 01:14:48 +0100
commit288efe8606b62d0753ba6722b36ef241877251fd (patch)
tree37cbacf02e504fafe20062ae25909a4ecfc4c807 /net/ipv6/tcp_ipv6.c
parentnet: use helpers to change sk_ack_backlog (diff)
downloadlinux-288efe8606b62d0753ba6722b36ef241877251fd.tar.xz
linux-288efe8606b62d0753ba6722b36ef241877251fd.zip
net: annotate lockless accesses to sk->sk_ack_backlog
sk->sk_ack_backlog can be read without any lock being held. 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/ipv6/tcp_ipv6.c')
-rw-r--r--net/ipv6/tcp_ipv6.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 4804b6dc5e65..81f51335e326 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1891,7 +1891,7 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
state = inet_sk_state_load(sp);
if (state == TCP_LISTEN)
- rx_queue = sp->sk_ack_backlog;
+ rx_queue = READ_ONCE(sp->sk_ack_backlog);
else
/* Because we don't lock the socket,
* we might find a transient negative value.