This is a note to let you know that I've just added the patch titled
net: atlantic: macsec: clear encryption keys from the stack
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:
net-atlantic-macsec-clear-encryption-keys-from-the-s.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 7945ee1fb5ae251b120570050d54c44523737000
Author: Antoine Tenart <atenart@xxxxxxxxxx>
Date: Tue Nov 8 16:34:59 2022 +0100
net: atlantic: macsec: clear encryption keys from the stack
[ Upstream commit 879785def0f5e71d54399de0f8a5cb399db14171 ]
Commit aaab73f8fba4 ("macsec: clear encryption keys from the stack after
setting up offload") made sure to clean encryption keys from the stack
after setting up offloading, but the atlantic driver made a copy and did
not clear it. Fix this.
[4 Fixes tags below, all part of the same series, no need to split this]
Fixes: 9ff40a751a6f ("net: atlantic: MACSec ingress offload implementation")
Fixes: b8f8a0b7b5cb ("net: atlantic: MACSec ingress offload HW bindings")
Fixes: 27736563ce32 ("net: atlantic: MACSec egress offload implementation")
Fixes: 9d106c6dd81b ("net: atlantic: MACSec egress offload HW bindings")
Signed-off-by: Antoine Tenart <atenart@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_macsec.c b/drivers/net/ethernet/aquantia/atlantic/aq_macsec.c
index 8b53d6688a4b..958b7f8c77d9 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_macsec.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_macsec.c
@@ -585,6 +585,7 @@ static int aq_update_txsa(struct aq_nic_s *nic, const unsigned int sc_idx,
ret = aq_mss_set_egress_sakey_record(hw, &key_rec, sa_idx);
+ memzero_explicit(&key_rec, sizeof(key_rec));
return ret;
}
@@ -932,6 +933,7 @@ static int aq_update_rxsa(struct aq_nic_s *nic, const unsigned int sc_idx,
ret = aq_mss_set_ingress_sakey_record(hw, &sa_key_record, sa_idx);
+ memzero_explicit(&sa_key_record, sizeof(sa_key_record));
return ret;
}
diff --git a/drivers/net/ethernet/aquantia/atlantic/macsec/macsec_api.c b/drivers/net/ethernet/aquantia/atlantic/macsec/macsec_api.c
index 36c7cf05630a..431924959520 100644
--- a/drivers/net/ethernet/aquantia/atlantic/macsec/macsec_api.c
+++ b/drivers/net/ethernet/aquantia/atlantic/macsec/macsec_api.c
@@ -757,6 +757,7 @@ set_ingress_sakey_record(struct aq_hw_s *hw,
u16 table_index)
{
u16 packed_record[18];
+ int ret;
if (table_index >= NUMROWS_INGRESSSAKEYRECORD)
return -EINVAL;
@@ -789,9 +790,12 @@ set_ingress_sakey_record(struct aq_hw_s *hw,
packed_record[16] = rec->key_len & 0x3;
- return set_raw_ingress_record(hw, packed_record, 18, 2,
- ROWOFFSET_INGRESSSAKEYRECORD +
- table_index);
+ ret = set_raw_ingress_record(hw, packed_record, 18, 2,
+ ROWOFFSET_INGRESSSAKEYRECORD +
+ table_index);
+
+ memzero_explicit(packed_record, sizeof(packed_record));
+ return ret;
}
int aq_mss_set_ingress_sakey_record(struct aq_hw_s *hw,
@@ -1739,14 +1743,14 @@ static int set_egress_sakey_record(struct aq_hw_s *hw,
ret = set_raw_egress_record(hw, packed_record, 8, 2,
ROWOFFSET_EGRESSSAKEYRECORD + table_index);
if (unlikely(ret))
- return ret;
+ goto clear_key;
ret = set_raw_egress_record(hw, packed_record + 8, 8, 2,
ROWOFFSET_EGRESSSAKEYRECORD + table_index -
32);
- if (unlikely(ret))
- return ret;
- return 0;
+clear_key:
+ memzero_explicit(packed_record, sizeof(packed_record));
+ return ret;
}
int aq_mss_set_egress_sakey_record(struct aq_hw_s *hw,
