kernel-5.4: bump to 5.4.102 and refresh patches

5.4.102 backported a lot of stuff that our WireGuard backport already
did, in addition to other patches we had, so those patches were
removed from that part of the series. In the process other patches were
refreshed or reworked to account for upstream changes.

This commit involved `update_kernel.sh -v -u 5.4`.

Cc: John Audia <graysky@archlinux.us>
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-0092-wireguard-receive-remove-dead-code-from-default-pack.patch b/target/linux/generic/backport-5.4/080-wireguard-0092-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-0092-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;