This is a note to let you know that I've just added the patch titled
net: macsec: indicate next pn update when offloading
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-macsec-indicate-next-pn-update-when-offloading.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f87921dec1abfe5f5a403c16fd6d706403ff9031
Author: Radu Pirea (NXP OSS) <radu-nicolae.pirea@xxxxxxxxxxx>
Date: Thu Oct 5 21:06:33 2023 +0300
net: macsec: indicate next pn update when offloading
[ Upstream commit 0412cc846a1ef38697c3f321f9b174da91ecd3b5 ]
Indicate next PN update using update_pn flag in macsec_context.
Offloaded MACsec implementations does not know whether or not the
MACSEC_SA_ATTR_PN attribute was passed for an SA update and assume
that next PN should always updated, but this is not always true.
The PN can be reset to its initial value using the following command:
$ ip macsec set macsec0 tx sa 0 off #octeontx2-pf case
Or, the update PN command will succeed even if the driver does not support
PN updates.
$ ip macsec set macsec0 tx sa 0 pn 1 on #mscc phy driver case
Comparing the initial PN with the new PN value is not a solution. When
the user updates the PN using its initial value the command will
succeed, even if the driver does not support it. Like this:
$ ip macsec add macsec0 tx sa 0 pn 1 on key 00 \
ead3664f508eb06c40ac7104cdae4ce5
$ ip macsec set macsec0 tx sa 0 pn 1 on #mlx5 case
Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@xxxxxxxxxxx>
Reviewed-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Stable-dep-of: e0a8c918daa5 ("net: phy: mscc: macsec: reject PN update requests")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 4fb58fc5ec95a..0ffcef2fa10af 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -2414,6 +2414,7 @@ static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
ctx.sa.assoc_num = assoc_num;
ctx.sa.tx_sa = tx_sa;
+ ctx.sa.update_pn = !!prev_pn.full64;
ctx.secy = secy;
ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
@@ -2507,6 +2508,7 @@ static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
ctx.sa.assoc_num = assoc_num;
ctx.sa.rx_sa = rx_sa;
+ ctx.sa.update_pn = !!prev_pn.full64;
ctx.secy = secy;
ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
diff --git a/include/net/macsec.h b/include/net/macsec.h
index d6fa6b97f6efa..0dc4303329391 100644
--- a/include/net/macsec.h
+++ b/include/net/macsec.h
@@ -240,6 +240,7 @@ struct macsec_context {
struct macsec_secy *secy;
struct macsec_rx_sc *rx_sc;
struct {
+ bool update_pn;
unsigned char assoc_num;
u8 key[MACSEC_MAX_KEY_LEN];
union {
