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Message-Id: <20210712061028.046164014@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:09:53 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Lior Nahmanson <liorna@...dia.com>,
Antoine Tenart <atenart@...nel.org>,
"David S. Miller" <davem@...emloft.net>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 570/800] net: phy: mscc: fix macsec key length
From: Antoine Tenart <atenart@...nel.org>
[ Upstream commit c309217f91f2d2097c2a0a832d9bff50b88c81dc ]
The key length used to store the macsec key 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 instead (the max length accepted in
uAPI).
Fixes: 28c5107aa904 ("net: phy: mscc: macsec support")
Reported-by: Lior Nahmanson <liorna@...dia.com>
Signed-off-by: Antoine Tenart <atenart@...nel.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/net/phy/mscc/mscc_macsec.c | 2 +-
drivers/net/phy/mscc/mscc_macsec.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/phy/mscc/mscc_macsec.c b/drivers/net/phy/mscc/mscc_macsec.c
index 10be266e48e8..b7b2521c73fb 100644
--- a/drivers/net/phy/mscc/mscc_macsec.c
+++ b/drivers/net/phy/mscc/mscc_macsec.c
@@ -501,7 +501,7 @@ static u32 vsc8584_macsec_flow_context_id(struct macsec_flow *flow)
}
/* Derive the AES key to get a key for the hash autentication */
-static int vsc8584_macsec_derive_key(const u8 key[MACSEC_KEYID_LEN],
+static int vsc8584_macsec_derive_key(const u8 key[MACSEC_MAX_KEY_LEN],
u16 key_len, u8 hkey[16])
{
const u8 input[AES_BLOCK_SIZE] = {0};
diff --git a/drivers/net/phy/mscc/mscc_macsec.h b/drivers/net/phy/mscc/mscc_macsec.h
index 9c6d25e36de2..453304bae778 100644
--- a/drivers/net/phy/mscc/mscc_macsec.h
+++ b/drivers/net/phy/mscc/mscc_macsec.h
@@ -81,7 +81,7 @@ struct macsec_flow {
/* Highest takes precedence [0..15] */
u8 priority;
- u8 key[MACSEC_KEYID_LEN];
+ u8 key[MACSEC_MAX_KEY_LEN];
union {
struct macsec_rx_sa *rx_sa;
--
2.30.2
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