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, 55 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/080-wireguard-0119-wireguard-avoid-double-unlikely-notation-when-using-.patch b/target/linux/generic/backport-5.4/080-wireguard-0119-wireguard-avoid-double-unlikely-notation-when-using-.patch
new file mode 100644
index 0000000000..7dfc1bb919
--- /dev/null
+++ b/target/linux/generic/backport-5.4/080-wireguard-0119-wireguard-avoid-double-unlikely-notation-when-using-.patch
@@ -0,0 +1,55 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Antonio Quartulli <a@unstable.cc>
+Date: Mon, 22 Feb 2021 17:25:43 +0100
+Subject: [PATCH] wireguard: avoid double unlikely() notation when using
+ IS_ERR()
+
+commit 30ac4e2f54ec067b7b9ca0db27e75681581378d6 upstream.
+
+The definition of IS_ERR() already applies the unlikely() notation
+when checking the error status of the passed pointer. For this
+reason there is no need to have the same notation outside of
+IS_ERR() itself.
+
+Clean up code by removing redundant notation.
+
+Signed-off-by: Antonio Quartulli <a@unstable.cc>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+---
+ drivers/net/wireguard/device.c | 2 +-
+ drivers/net/wireguard/socket.c | 4 ++--
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+--- a/drivers/net/wireguard/device.c
++++ b/drivers/net/wireguard/device.c
+@@ -157,7 +157,7 @@ static netdev_tx_t wg_xmit(struct sk_buf
+ 	} else {
+ 		struct sk_buff *segs = skb_gso_segment(skb, 0);
+ 
+-		if (unlikely(IS_ERR(segs))) {
++		if (IS_ERR(segs)) {
+ 			ret = PTR_ERR(segs);
+ 			goto err_peer;
+ 		}
+--- a/drivers/net/wireguard/socket.c
++++ b/drivers/net/wireguard/socket.c
+@@ -71,7 +71,7 @@ static int send4(struct wg_device *wg, s
+ 				ip_rt_put(rt);
+ 			rt = ip_route_output_flow(sock_net(sock), &fl, sock);
+ 		}
+-		if (unlikely(IS_ERR(rt))) {
++		if (IS_ERR(rt)) {
+ 			ret = PTR_ERR(rt);
+ 			net_dbg_ratelimited("%s: No route to %pISpfsc, error %d\n",
+ 					    wg->dev->name, &endpoint->addr, ret);
+@@ -138,7 +138,7 @@ static int send6(struct wg_device *wg, s
+ 		}
+ 		dst = ipv6_stub->ipv6_dst_lookup_flow(sock_net(sock), sock, &fl,
+ 						      NULL);
+-		if (unlikely(IS_ERR(dst))) {
++		if (IS_ERR(dst)) {
+ 			ret = PTR_ERR(dst);
+ 			net_dbg_ratelimited("%s: No route to %pISpfsc, error %d\n",
+ 					    wg->dev->name, &endpoint->addr, ret);