5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kuniyuki Iwashima <kuniyu@xxxxxxxxxx> [ 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@xxxxxxxxxx> Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- net/unix/af_unix.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -873,7 +873,7 @@ static struct sock *unix_create1(struct 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;