4.19-stable review patch. If anyone has any objections, please let me know.
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From: Kuniyuki Iwashima kuniyu@amazon.com
[ Upstream commit bd9f2d05731f6a112d0c7391a0d537bfc588dbe6 ]
net->unx.sysctl_max_dgram_qlen is exposed as a sysctl knob and can be changed concurrently.
Let's use READ_ONCE() in unix_create1().
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Kuniyuki Iwashima kuniyu@amazon.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/unix/af_unix.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index c01955ccf6b39..4a4b6d2544534 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -812,7 +812,7 @@ static struct sock *unix_create1(struct net *net, struct socket *sock, int kern)
sk->sk_allocation = GFP_KERNEL_ACCOUNT; sk->sk_write_space = unix_write_space; - sk->sk_max_ack_backlog = net->unx.sysctl_max_dgram_qlen; + sk->sk_max_ack_backlog = READ_ONCE(net->unx.sysctl_max_dgram_qlen); sk->sk_destruct = unix_sock_destructor; u = unix_sk(sk); u->inflight = 0;