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macsec: clear encryption keys from the stack after setting up offload

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[ Upstream commit aaab73f8fb ]

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: 3cf3227a21 ("net: macsec: hardware offloading infrastructure")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sabrina Dubroca 2022-11-02 22:33:16 +01:00 committed by Greg Kroah-Hartman
parent f0d1731d95
commit c1d3a65203
1 changed files with 2 additions and 0 deletions
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2
drivers/net/macsec.c
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@ -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;
}