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Commit daf4e2c8 authored by Lennert Buytenhek's avatar Lennert Buytenhek Committed by Marcel Holtmann
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ieee802154: Fix EUI-64 station address validation.



Refuse to allow setting an EUI-64 group address as an interface
address, as those are not valid station addresses.

Signed-off-by: default avatarLennert Buytenhek <buytenh@wantstofly.org>
Acked-by: default avatarAlexander Aring <alex.aring@gmail.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 3b369bd2
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+4 −6
Original line number Diff line number Diff line
@@ -225,15 +225,13 @@ static inline bool ieee802154_is_valid_psdu_len(const u8 len)
 * ieee802154_is_valid_psdu_len - check if extended addr is valid
 * @addr: extended addr to check
 */
static inline bool ieee802154_is_valid_extended_addr(const __le64 addr)
static inline bool ieee802154_is_valid_extended_unicast_addr(const __le64 addr)
{
	/* These EUI-64 addresses are reserved by IEEE. 0xffffffffffffffff
	 * is used internally as extended to short address broadcast mapping.
	 * This is currently a workaround because neighbor discovery can't
	 * deal with short addresses types right now.
	/* Bail out if the address is all zero, or if the group
	 * address bit is set.
	 */
	return ((addr != cpu_to_le64(0x0000000000000000ULL)) &&
		(addr != cpu_to_le64(0xffffffffffffffffULL)));
		!(addr & cpu_to_le64(0x0100000000000000ULL)));
}

/**
+2 −2
Original line number Diff line number Diff line
@@ -126,7 +126,7 @@ static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
		return -EBUSY;

	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
	if (!ieee802154_is_valid_extended_addr(extended_addr))
	if (!ieee802154_is_valid_extended_unicast_addr(extended_addr))
		return -EINVAL;

	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
@@ -539,7 +539,7 @@ ieee802154_if_add(struct ieee802154_local *local, const char *name,
	switch (type) {
	case NL802154_IFTYPE_NODE:
		ndev->type = ARPHRD_IEEE802154;
		if (ieee802154_is_valid_extended_addr(extended_addr))
		if (ieee802154_is_valid_extended_unicast_addr(extended_addr))
			ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
		else
			memcpy(ndev->dev_addr, ndev->perm_addr,