This is a note to let you know that I've just added the patch titled
macsec: clear encryption keys from the stack after setting up offload
to the 6.0-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:
macsec-clear-encryption-keys-from-the-stack-after-se.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e7e771d76f6b96ecdcd71cc31bb1425b2c0a5f19
Author: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Date: Wed Nov 2 22:33:16 2022 +0100
macsec: clear encryption keys from the stack after setting up offload
[ Upstream commit aaab73f8fba4fd38f4d2617440d541a1c334e819 ]
macsec_add_rxsa and macsec_add_txsa copy the key to an on-stack
offloading context to pass it to the drivers, but leaves it there when
it's done. Clear it with memzero_explicit as soon as it's not needed
anymore.
Fixes: 3cf3227a21d1 ("net: macsec: hardware offloading infrastructure")
Signed-off-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Reviewed-by: Antoine Tenart <atenart@xxxxxxxxxx>
Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 2add76c8064b..ddfa853ec9b5 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -1861,6 +1861,7 @@ static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
secy->key_len);
err = macsec_offload(ops->mdo_add_rxsa, &ctx);
+ memzero_explicit(ctx.sa.key, secy->key_len);
if (err)
goto cleanup;
}
@@ -2103,6 +2104,7 @@ static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
secy->key_len);
err = macsec_offload(ops->mdo_add_txsa, &ctx);
+ memzero_explicit(ctx.sa.key, secy->key_len);
if (err)
goto cleanup;
}
