[][Add macsec HW offload backport from kernel 5.18]
[Description]
Add macsec HW offload backport from kernel 5.18.
[Release-log]
N/A
Change-Id: I5b143fe620ec4bcae4075d1d85db5e41c8d48717
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5981730
diff --git a/target/linux/mediatek/patches-5.4/999-1783-v5.18-net-macsec-fix-the-length-used-to-copy-the-key-for-offloading.patch b/target/linux/mediatek/patches-5.4/999-1783-v5.18-net-macsec-fix-the-length-used-to-copy-the-key-for-offloading.patch
new file mode 100644
index 0000000..ed68254
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/999-1783-v5.18-net-macsec-fix-the-length-used-to-copy-the-key-for-offloading.patch
@@ -0,0 +1,60 @@
+From 1f7fe5121127e037b86592ba42ce36515ea0e3f7 Mon Sep 17 00:00:00 2001
+From: Antoine Tenart <atenart@kernel.org>
+Date: Thu, 24 Jun 2021 11:38:28 +0200
+Subject: net: macsec: fix the length used to copy the key for offloading
+
+The key length used when offloading macsec to Ethernet or PHY drivers
+was set to MACSEC_KEYID_LEN (16), which is an issue as:
+- This was never meant to be the key length.
+- The key length can be > 16.
+
+Fix this by using MACSEC_MAX_KEY_LEN to store the key (the max length
+accepted in uAPI) and secy->key_len to copy it.
+
+Fixes: 3cf3227a21d1 ("net: macsec: hardware offloading infrastructure")
+Reported-by: Lior Nahmanson <liorna@nvidia.com>
+Signed-off-by: Antoine Tenart <atenart@kernel.org>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/macsec.c | 4 ++--
+ include/net/macsec.h | 2 +-
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
+index 92425e1fd70c0..93dc48b9b4f24 100644
+--- a/drivers/net/macsec.c
++++ b/drivers/net/macsec.c
+@@ -1819,7 +1819,7 @@ static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
+ ctx.sa.rx_sa = rx_sa;
+ ctx.secy = secy;
+ memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
+- MACSEC_KEYID_LEN);
++ secy->key_len);
+
+ err = macsec_offload(ops->mdo_add_rxsa, &ctx);
+ if (err)
+@@ -2061,7 +2061,7 @@ static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
+ ctx.sa.tx_sa = tx_sa;
+ ctx.secy = secy;
+ memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
+- MACSEC_KEYID_LEN);
++ secy->key_len);
+
+ err = macsec_offload(ops->mdo_add_txsa, &ctx);
+ if (err)
+diff --git a/include/net/macsec.h b/include/net/macsec.h
+index 52874cdfe2260..d6fa6b97f6efa 100644
+--- a/include/net/macsec.h
++++ b/include/net/macsec.h
+@@ -241,7 +241,7 @@ struct macsec_context {
+ struct macsec_rx_sc *rx_sc;
+ struct {
+ unsigned char assoc_num;
+- u8 key[MACSEC_KEYID_LEN];
++ u8 key[MACSEC_MAX_KEY_LEN];
+ union {
+ struct macsec_rx_sa *rx_sa;
+ struct macsec_tx_sa *tx_sa;
+--
+cgit 1.2.3-1.el7
+