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, 35 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/080-wireguard-0094-wireguard-receive-remove-dead-code-from-default-pack.patch b/target/linux/generic/backport-5.4/080-wireguard-0094-wireguard-receive-remove-dead-code-from-default-pack.patch
new file mode 100644
index 0000000000..bcd4fbfbc1
--- /dev/null
+++ b/target/linux/generic/backport-5.4/080-wireguard-0094-wireguard-receive-remove-dead-code-from-default-pack.patch
@@ -0,0 +1,35 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: "Jason A. Donenfeld" <Jason@zx2c4.com>
+Date: Wed, 18 Mar 2020 18:30:46 -0600
+Subject: [PATCH] wireguard: receive: remove dead code from default packet type
+ case
+
+commit 2b8765c52db24c0fbcc81bac9b5e8390f2c7d3c8 upstream.
+
+The situation in which we wind up hitting the default case here
+indicates a major bug in earlier parsing code. It is not a usual thing
+that should ever happen, which means a "friendly" message for it doesn't
+make sense. Rather, replace this with a WARN_ON, just like we do earlier
+in the file for a similar situation, so that somebody sends us a bug
+report and we can fix it.
+
+Reported-by: Fabian Freyer <fabianfreyer@radicallyopensecurity.com>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+---
+ drivers/net/wireguard/receive.c | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+--- a/drivers/net/wireguard/receive.c
++++ b/drivers/net/wireguard/receive.c
+@@ -587,8 +587,7 @@ void wg_packet_receive(struct wg_device
+ 		wg_packet_consume_data(wg, skb);
+ 		break;
+ 	default:
+-		net_dbg_skb_ratelimited("%s: Invalid packet from %pISpfsc\n",
+-					wg->dev->name, skb);
++		WARN(1, "Non-exhaustive parsing of packet header lead to unknown packet type!\n");
+ 		goto err;
+ 	}
+ 	return;