[PATCH] bonding: reject IEEE 802.15.4 devices in bond_enslave
From: Jiale Yao
Date: Mon Aug 31 2026 - 13:02:47 EST
Bonding already refuses CAN devices because their protocol-specific state
is incompatible with the bonding model. IEEE 802.15.4 devices have the
same constraint: they keep protocol-specific state in
dev->ieee802154_ptr and do not use Ethernet link-layer semantics.
Extend the existing check to reject ARPHRD_IEEE802154 and
ARPHRD_IEEE802154_MONITOR devices before bonding changes their link-layer
settings.
Link: https://lore.kernel.org/netdev/aohMHTTH4VqqgZA7@fedora/
Link: https://lore.kernel.org/netdev/6001bd73-ef68-4820-8371-a22775fb820a@xxxxxxxxxxxx/
Fixes: d5ae67bacd96 ("ieee802154: rework interface registration")
Suggested-by: Oliver Hartkopp <socketcan@xxxxxxxxxxxx>
Signed-off-by: Jiale Yao <yaojiale02@xxxxxxx>
---
drivers/net/bonding/bond_main.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 522eab060f9e..c716336c5172 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1894,9 +1894,11 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
struct sockaddr_storage ss;
int res = 0, i;
- if (slave_dev->type == ARPHRD_CAN) {
+ if (slave_dev->type == ARPHRD_CAN ||
+ slave_dev->type == ARPHRD_IEEE802154 ||
+ slave_dev->type == ARPHRD_IEEE802154_MONITOR) {
BOND_NL_ERR(bond_dev, extack,
- "CAN devices cannot be enslaved");
+ "CAN and IEEE 802.15.4 devices cannot be enslaved");
return -EPERM;
}
--
2.34.1