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, 41 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/080-wireguard-0079-wireguard-allowedips-use-kfree_rcu-instead-of-call_r.patch b/target/linux/generic/backport-5.4/080-wireguard-0079-wireguard-allowedips-use-kfree_rcu-instead-of-call_r.patch
new file mode 100644
index 0000000000..edd90484dd
--- /dev/null
+++ b/target/linux/generic/backport-5.4/080-wireguard-0079-wireguard-allowedips-use-kfree_rcu-instead-of-call_r.patch
@@ -0,0 +1,41 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Wei Yongjun <weiyongjun1@huawei.com>
+Date: Sun, 15 Dec 2019 22:08:04 +0100
+Subject: [PATCH] wireguard: allowedips: use kfree_rcu() instead of call_rcu()
+
+commit d89ee7d5c73af15c1c6f12b016cdf469742b5726 upstream.
+
+The callback function of call_rcu() just calls a kfree(), so we
+can use kfree_rcu() instead of call_rcu() + callback function.
+
+Signed-off-by: Wei Yongjun <weiyongjun1@huawei.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/allowedips.c | 7 +------
+ 1 file changed, 1 insertion(+), 6 deletions(-)
+
+--- a/drivers/net/wireguard/allowedips.c
++++ b/drivers/net/wireguard/allowedips.c
+@@ -31,11 +31,6 @@ static void copy_and_assign_cidr(struct
+ #define CHOOSE_NODE(parent, key) \
+ 	parent->bit[(key[parent->bit_at_a] >> parent->bit_at_b) & 1]
+ 
+-static void node_free_rcu(struct rcu_head *rcu)
+-{
+-	kfree(container_of(rcu, struct allowedips_node, rcu));
+-}
+-
+ static void push_rcu(struct allowedips_node **stack,
+ 		     struct allowedips_node __rcu *p, unsigned int *len)
+ {
+@@ -112,7 +107,7 @@ static void walk_remove_by_peer(struct a
+ 				if (!node->bit[0] || !node->bit[1]) {
+ 					rcu_assign_pointer(*nptr, DEREF(
+ 					       &node->bit[!REF(node->bit[0])]));
+-					call_rcu(&node->rcu, node_free_rcu);
++					kfree_rcu(node, rcu);
+ 					node = DEREF(nptr);
+ 				}
+ 			}