kernel-5.4: backport fd16931a2f51 for chacha neon

Without this patch, the chacha block counter is not incremented on neon
rounds, resulting in incorrect calculations and corrupt packets.

This also switches to using `--no-numbered --zero-commit` so that future
diffs are smaller.

Reported-by: Hans Geiblinger <cybrnook2002@yahoo.com>
Reviewed-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Cc: David Bauer <mail@david-bauer.net>
Cc: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/080-wireguard-0091-wireguard-socket-remove-extra-call-to-synchronize_ne.patch b/target/linux/generic/backport-5.4/080-wireguard-0091-wireguard-socket-remove-extra-call-to-synchronize_ne.patch
new file mode 100644
index 0000000000..458e9d51e5
--- /dev/null
+++ b/target/linux/generic/backport-5.4/080-wireguard-0091-wireguard-socket-remove-extra-call-to-synchronize_ne.patch
@@ -0,0 +1,32 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: "Jason A. Donenfeld" <Jason@zx2c4.com>
+Date: Fri, 14 Feb 2020 23:57:23 +0100
+Subject: [PATCH] wireguard: socket: remove extra call to synchronize_net
+
+commit 1fbc33b0a7feb6ca72bf7dc8a05d81485ee8ee2e upstream.
+
+synchronize_net() is a wrapper around synchronize_rcu(), so there's no
+point in having synchronize_net and synchronize_rcu back to back,
+despite the documentation comment suggesting maybe it's somewhat useful,
+"Wait for packets currently being received to be done." This commit
+removes the extra call.
+
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
+Reviewed-by: Eric Dumazet <edumazet@google.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+---
+ drivers/net/wireguard/socket.c | 1 -
+ 1 file changed, 1 deletion(-)
+
+--- a/drivers/net/wireguard/socket.c
++++ b/drivers/net/wireguard/socket.c
+@@ -432,7 +432,6 @@ void wg_socket_reinit(struct wg_device *
+ 		wg->incoming_port = ntohs(inet_sk(new4)->inet_sport);
+ 	mutex_unlock(&wg->socket_update_lock);
+ 	synchronize_rcu();
+-	synchronize_net();
+ 	sock_free(old4);
+ 	sock_free(old6);
+ }