[PATCH 3/7] net/ncsi: Use struct sockaddr_storage for pending_mac

Kees Cook
2025-05-20T22:31:14Z

To avoid future casting with coming API type changes, switch struct
ncsi_dev_priv::pending_mac to a full struct sockaddr_storage.

Signed-off-by: Kees Cook <kees@kernel.org>
---
Cc: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Cc: Paul Fertser <fercerpav@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Simon Horman <horms@kernel.org>
Cc: <netdev@vger.kernel.org>
---
net/ncsi/internal.h | 2 +-
net/ncsi/ncsi-manage.c | 2 +-
net/ncsi/ncsi-rsp.c | 18 +++++++++---------
3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h
index 2c260f33b55c..e76c6de0c784 100644
--- a/net/ncsi/internal.h
+++ b/net/ncsi/internal.h
@@ -322,7 +322,7 @@ struct ncsi_dev_priv {
#define NCSI_DEV_RESHUFFLE 4
#define NCSI_DEV_RESET 8 /* Reset state of NC */
unsigned int gma_flag; /* OEM GMA flag */
- struct sockaddr pending_mac; /* MAC address received from GMA */
+ struct sockaddr_storage pending_mac; /* MAC address received from GMA */
spinlock_t lock; /* Protect the NCSI device */
unsigned int package_probe_id;/* Current ID during probe */
unsigned int package_num; /* Number of packages */
diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c
index b36947063783..0202db2aea3e 100644
--- a/net/ncsi/ncsi-manage.c
+++ b/net/ncsi/ncsi-manage.c
@@ -1058,7 +1058,7 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
break;
case ncsi_dev_state_config_apply_mac:
rtnl_lock();
- ret = dev_set_mac_address(dev, &ndp->pending_mac, NULL);
+ ret = dev_set_mac_address(dev, (struct sockaddr *)&ndp->pending_mac, NULL);
rtnl_unlock();
if (ret < 0)
netdev_warn(dev, "NCSI: 'Writing MAC address to device failed\n");
diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c
index 8668888c5a2f..472cc68ad86f 100644
--- a/net/ncsi/ncsi-rsp.c
+++ b/net/ncsi/ncsi-rsp.c
@@ -628,7 +628,7 @@ static int ncsi_rsp_handler_snfc(struct ncsi_request *nr)
static int ncsi_rsp_handler_oem_gma(struct ncsi_request *nr, int mfr_id)
{
struct ncsi_dev_priv *ndp = nr->ndp;
- struct sockaddr *saddr = &ndp->pending_mac;
+ struct sockaddr_storage *saddr = &ndp->pending_mac;
struct net_device *ndev = ndp->ndev.dev;
struct ncsi_rsp_oem_pkt *rsp;
u32 mac_addr_off = 0;
@@ -644,11 +644,11 @@ static int ncsi_rsp_handler_oem_gma(struct ncsi_request *nr, int mfr_id)
else if (mfr_id == NCSI_OEM_MFR_INTEL_ID)
mac_addr_off = INTEL_MAC_ADDR_OFFSET;

- saddr->sa_family = ndev->type;
- memcpy(saddr->sa_data, &rsp->data[mac_addr_off], ETH_ALEN);
+ saddr->ss_family = ndev->type;
+ memcpy(saddr->__data, &rsp->data[mac_addr_off], ETH_ALEN);
if (mfr_id == NCSI_OEM_MFR_BCM_ID || mfr_id == NCSI_OEM_MFR_INTEL_ID)
- eth_addr_inc((u8 *)saddr->sa_data);
- if (!is_valid_ether_addr((const u8 *)saddr->sa_data))
+ eth_addr_inc(saddr->__data);
+ if (!is_valid_ether_addr(saddr->__data))
return -ENXIO;

/* Set the flag for GMA command which should only be called once */
@@ -1088,7 +1088,7 @@ static int ncsi_rsp_handler_netlink(struct ncsi_request *nr)
static int ncsi_rsp_handler_gmcma(struct ncsi_request *nr)
{
struct ncsi_dev_priv *ndp = nr->ndp;
- struct sockaddr *saddr = &ndp->pending_mac;
+ struct sockaddr_storage *saddr = &ndp->pending_mac;
struct net_device *ndev = ndp->ndev.dev;
struct ncsi_rsp_gmcma_pkt *rsp;
int i;
@@ -1105,15 +1105,15 @@ static int ncsi_rsp_handler_gmcma(struct ncsi_request *nr)
rsp->addresses[i][4], rsp->addresses[i][5]);
}

- saddr->sa_family = ndev->type;
+ saddr->ss_family = ndev->type;
for (i = 0; i < rsp->address_count; i++) {
if (!is_valid_ether_addr(rsp->addresses[i])) {
netdev_warn(ndev, "NCSI: Unable to assign %pM to device\n",
rsp->addresses[i]);
continue;
}
- memcpy(saddr->sa_data, rsp->addresses[i], ETH_ALEN);
- netdev_warn(ndev, "NCSI: Will set MAC address to %pM\n", saddr->sa_data);
+ memcpy(saddr->__data, rsp->addresses[i], ETH_ALEN);
+ netdev_warn(ndev, "NCSI: Will set MAC address to %pM\n", saddr->__data);
break;
}

--
2.34.1